ASTReader.cpp revision e95b9198b8b70ce0219cfb89483b41102e02dbf5
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 "clang/Basic/VersionTuple.h" 41#include "llvm/ADT/StringExtras.h" 42#include "llvm/Bitcode/BitstreamReader.h" 43#include "llvm/Support/MemoryBuffer.h" 44#include "llvm/Support/ErrorHandling.h" 45#include "llvm/Support/FileSystem.h" 46#include "llvm/Support/Path.h" 47#include "llvm/Support/system_error.h" 48#include <algorithm> 49#include <iterator> 50#include <cstdio> 51#include <sys/stat.h> 52#include <iostream> 53 54using namespace clang; 55using namespace clang::serialization; 56 57//===----------------------------------------------------------------------===// 58// PCH validator implementation 59//===----------------------------------------------------------------------===// 60 61ASTReaderListener::~ASTReaderListener() {} 62 63bool 64PCHValidator::ReadLanguageOptions(const LangOptions &LangOpts) { 65 const LangOptions &PPLangOpts = PP.getLangOptions(); 66#define PARSE_LANGOPT_BENIGN(Option) 67#define PARSE_LANGOPT_IMPORTANT(Option, DiagID) \ 68 if (PPLangOpts.Option != LangOpts.Option) { \ 69 Reader.Diag(DiagID) << LangOpts.Option << PPLangOpts.Option; \ 70 return true; \ 71 } 72 73 PARSE_LANGOPT_BENIGN(Trigraphs); 74 PARSE_LANGOPT_BENIGN(BCPLComment); 75 PARSE_LANGOPT_BENIGN(DollarIdents); 76 PARSE_LANGOPT_BENIGN(AsmPreprocessor); 77 PARSE_LANGOPT_IMPORTANT(GNUMode, diag::warn_pch_gnu_extensions); 78 PARSE_LANGOPT_IMPORTANT(GNUKeywords, diag::warn_pch_gnu_keywords); 79 PARSE_LANGOPT_BENIGN(ImplicitInt); 80 PARSE_LANGOPT_BENIGN(Digraphs); 81 PARSE_LANGOPT_BENIGN(HexFloats); 82 PARSE_LANGOPT_IMPORTANT(C99, diag::warn_pch_c99); 83 PARSE_LANGOPT_IMPORTANT(C1X, diag::warn_pch_c1x); 84 PARSE_LANGOPT_IMPORTANT(Microsoft, diag::warn_pch_microsoft_extensions); 85 PARSE_LANGOPT_BENIGN(MSCVersion); 86 PARSE_LANGOPT_IMPORTANT(CPlusPlus, diag::warn_pch_cplusplus); 87 PARSE_LANGOPT_IMPORTANT(CPlusPlus0x, diag::warn_pch_cplusplus0x); 88 PARSE_LANGOPT_BENIGN(CXXOperatorName); 89 PARSE_LANGOPT_IMPORTANT(ObjC1, diag::warn_pch_objective_c); 90 PARSE_LANGOPT_IMPORTANT(ObjC2, diag::warn_pch_objective_c2); 91 PARSE_LANGOPT_IMPORTANT(ObjCNonFragileABI, diag::warn_pch_nonfragile_abi); 92 PARSE_LANGOPT_IMPORTANT(ObjCNonFragileABI2, diag::warn_pch_nonfragile_abi2); 93 PARSE_LANGOPT_IMPORTANT(AppleKext, diag::warn_pch_apple_kext); 94 PARSE_LANGOPT_IMPORTANT(ObjCDefaultSynthProperties, 95 diag::warn_pch_objc_auto_properties); 96 PARSE_LANGOPT_BENIGN(ObjCInferRelatedResultType) 97 PARSE_LANGOPT_IMPORTANT(NoConstantCFStrings, 98 diag::warn_pch_no_constant_cfstrings); 99 PARSE_LANGOPT_BENIGN(PascalStrings); 100 PARSE_LANGOPT_BENIGN(WritableStrings); 101 PARSE_LANGOPT_IMPORTANT(LaxVectorConversions, 102 diag::warn_pch_lax_vector_conversions); 103 PARSE_LANGOPT_IMPORTANT(AltiVec, diag::warn_pch_altivec); 104 PARSE_LANGOPT_IMPORTANT(Exceptions, diag::warn_pch_exceptions); 105 PARSE_LANGOPT_IMPORTANT(ObjCExceptions, diag::warn_pch_objc_exceptions); 106 PARSE_LANGOPT_IMPORTANT(CXXExceptions, diag::warn_pch_cxx_exceptions); 107 PARSE_LANGOPT_IMPORTANT(SjLjExceptions, diag::warn_pch_sjlj_exceptions); 108 PARSE_LANGOPT_IMPORTANT(MSBitfields, diag::warn_pch_ms_bitfields); 109 PARSE_LANGOPT_IMPORTANT(NeXTRuntime, diag::warn_pch_objc_runtime); 110 PARSE_LANGOPT_IMPORTANT(Freestanding, diag::warn_pch_freestanding); 111 PARSE_LANGOPT_IMPORTANT(NoBuiltin, diag::warn_pch_builtins); 112 PARSE_LANGOPT_IMPORTANT(ThreadsafeStatics, 113 diag::warn_pch_thread_safe_statics); 114 PARSE_LANGOPT_IMPORTANT(POSIXThreads, diag::warn_pch_posix_threads); 115 PARSE_LANGOPT_IMPORTANT(Blocks, diag::warn_pch_blocks); 116 PARSE_LANGOPT_BENIGN(EmitAllDecls); 117 PARSE_LANGOPT_IMPORTANT(MathErrno, diag::warn_pch_math_errno); 118 PARSE_LANGOPT_BENIGN(getSignedOverflowBehavior()); 119 PARSE_LANGOPT_IMPORTANT(HeinousExtensions, 120 diag::warn_pch_heinous_extensions); 121 // FIXME: Most of the options below are benign if the macro wasn't 122 // used. Unfortunately, this means that a PCH compiled without 123 // optimization can't be used with optimization turned on, even 124 // though the only thing that changes is whether __OPTIMIZE__ was 125 // defined... but if __OPTIMIZE__ never showed up in the header, it 126 // doesn't matter. We could consider making this some special kind 127 // of check. 128 PARSE_LANGOPT_IMPORTANT(Optimize, diag::warn_pch_optimize); 129 PARSE_LANGOPT_IMPORTANT(OptimizeSize, diag::warn_pch_optimize_size); 130 PARSE_LANGOPT_IMPORTANT(Static, diag::warn_pch_static); 131 PARSE_LANGOPT_IMPORTANT(PICLevel, diag::warn_pch_pic_level); 132 PARSE_LANGOPT_IMPORTANT(GNUInline, diag::warn_pch_gnu_inline); 133 PARSE_LANGOPT_IMPORTANT(NoInline, diag::warn_pch_no_inline); 134 PARSE_LANGOPT_IMPORTANT(Deprecated, diag::warn_pch_deprecated); 135 PARSE_LANGOPT_IMPORTANT(AccessControl, diag::warn_pch_access_control); 136 PARSE_LANGOPT_IMPORTANT(CharIsSigned, diag::warn_pch_char_signed); 137 PARSE_LANGOPT_IMPORTANT(ShortWChar, diag::warn_pch_short_wchar); 138 PARSE_LANGOPT_IMPORTANT(ShortEnums, diag::warn_pch_short_enums); 139 if ((PPLangOpts.getGCMode() != 0) != (LangOpts.getGCMode() != 0)) { 140 Reader.Diag(diag::warn_pch_gc_mode) 141 << LangOpts.getGCMode() << PPLangOpts.getGCMode(); 142 return true; 143 } 144 PARSE_LANGOPT_BENIGN(getVisibilityMode()); 145 PARSE_LANGOPT_IMPORTANT(getStackProtectorMode(), 146 diag::warn_pch_stack_protector); 147 PARSE_LANGOPT_BENIGN(InstantiationDepth); 148 PARSE_LANGOPT_IMPORTANT(OpenCL, diag::warn_pch_opencl); 149 PARSE_LANGOPT_IMPORTANT(CUDA, diag::warn_pch_cuda); 150 PARSE_LANGOPT_BENIGN(CatchUndefined); 151 PARSE_LANGOPT_BENIGN(DefaultFPContract); 152 PARSE_LANGOPT_IMPORTANT(ElideConstructors, diag::warn_pch_elide_constructors); 153 PARSE_LANGOPT_BENIGN(SpellChecking); 154 PARSE_LANGOPT_IMPORTANT(ObjCAutoRefCount, diag::warn_pch_auto_ref_count); 155 PARSE_LANGOPT_BENIGN(ObjCInferRelatedReturnType); 156#undef PARSE_LANGOPT_IMPORTANT 157#undef PARSE_LANGOPT_BENIGN 158 159 return false; 160} 161 162bool PCHValidator::ReadTargetTriple(StringRef Triple) { 163 if (Triple == PP.getTargetInfo().getTriple().str()) 164 return false; 165 166 Reader.Diag(diag::warn_pch_target_triple) 167 << Triple << PP.getTargetInfo().getTriple().str(); 168 return true; 169} 170 171namespace { 172 struct EmptyStringRef { 173 bool operator ()(StringRef r) const { return r.empty(); } 174 }; 175 struct EmptyBlock { 176 bool operator ()(const PCHPredefinesBlock &r) const {return r.Data.empty();} 177 }; 178} 179 180static bool EqualConcatenations(SmallVector<StringRef, 2> L, 181 PCHPredefinesBlocks R) { 182 // First, sum up the lengths. 183 unsigned LL = 0, RL = 0; 184 for (unsigned I = 0, N = L.size(); I != N; ++I) { 185 LL += L[I].size(); 186 } 187 for (unsigned I = 0, N = R.size(); I != N; ++I) { 188 RL += R[I].Data.size(); 189 } 190 if (LL != RL) 191 return false; 192 if (LL == 0 && RL == 0) 193 return true; 194 195 // Kick out empty parts, they confuse the algorithm below. 196 L.erase(std::remove_if(L.begin(), L.end(), EmptyStringRef()), L.end()); 197 R.erase(std::remove_if(R.begin(), R.end(), EmptyBlock()), R.end()); 198 199 // Do it the hard way. At this point, both vectors must be non-empty. 200 StringRef LR = L[0], RR = R[0].Data; 201 unsigned LI = 0, RI = 0, LN = L.size(), RN = R.size(); 202 (void) RN; 203 for (;;) { 204 // Compare the current pieces. 205 if (LR.size() == RR.size()) { 206 // If they're the same length, it's pretty easy. 207 if (LR != RR) 208 return false; 209 // Both pieces are done, advance. 210 ++LI; 211 ++RI; 212 // If either string is done, they're both done, since they're the same 213 // length. 214 if (LI == LN) { 215 assert(RI == RN && "Strings not the same length after all?"); 216 return true; 217 } 218 LR = L[LI]; 219 RR = R[RI].Data; 220 } else if (LR.size() < RR.size()) { 221 // Right piece is longer. 222 if (!RR.startswith(LR)) 223 return false; 224 ++LI; 225 assert(LI != LN && "Strings not the same length after all?"); 226 RR = RR.substr(LR.size()); 227 LR = L[LI]; 228 } else { 229 // Left piece is longer. 230 if (!LR.startswith(RR)) 231 return false; 232 ++RI; 233 assert(RI != RN && "Strings not the same length after all?"); 234 LR = LR.substr(RR.size()); 235 RR = R[RI].Data; 236 } 237 } 238} 239 240static std::pair<FileID, StringRef::size_type> 241FindMacro(const PCHPredefinesBlocks &Buffers, StringRef MacroDef) { 242 std::pair<FileID, StringRef::size_type> Res; 243 for (unsigned I = 0, N = Buffers.size(); I != N; ++I) { 244 Res.second = Buffers[I].Data.find(MacroDef); 245 if (Res.second != StringRef::npos) { 246 Res.first = Buffers[I].BufferID; 247 break; 248 } 249 } 250 return Res; 251} 252 253bool PCHValidator::ReadPredefinesBuffer(const PCHPredefinesBlocks &Buffers, 254 StringRef OriginalFileName, 255 std::string &SuggestedPredefines, 256 FileManager &FileMgr) { 257 // We are in the context of an implicit include, so the predefines buffer will 258 // have a #include entry for the PCH file itself (as normalized by the 259 // preprocessor initialization). Find it and skip over it in the checking 260 // below. 261 llvm::SmallString<256> PCHInclude; 262 PCHInclude += "#include \""; 263 PCHInclude += NormalizeDashIncludePath(OriginalFileName, FileMgr); 264 PCHInclude += "\"\n"; 265 std::pair<StringRef,StringRef> Split = 266 StringRef(PP.getPredefines()).split(PCHInclude.str()); 267 StringRef Left = Split.first, Right = Split.second; 268 if (Left == PP.getPredefines()) { 269 Error("Missing PCH include entry!"); 270 return true; 271 } 272 273 // If the concatenation of all the PCH buffers is equal to the adjusted 274 // command line, we're done. 275 SmallVector<StringRef, 2> CommandLine; 276 CommandLine.push_back(Left); 277 CommandLine.push_back(Right); 278 if (EqualConcatenations(CommandLine, Buffers)) 279 return false; 280 281 SourceManager &SourceMgr = PP.getSourceManager(); 282 283 // The predefines buffers are different. Determine what the differences are, 284 // and whether they require us to reject the PCH file. 285 SmallVector<StringRef, 8> PCHLines; 286 for (unsigned I = 0, N = Buffers.size(); I != N; ++I) 287 Buffers[I].Data.split(PCHLines, "\n", /*MaxSplit=*/-1, /*KeepEmpty=*/false); 288 289 SmallVector<StringRef, 8> CmdLineLines; 290 Left.split(CmdLineLines, "\n", /*MaxSplit=*/-1, /*KeepEmpty=*/false); 291 292 // Pick out implicit #includes after the PCH and don't consider them for 293 // validation; we will insert them into SuggestedPredefines so that the 294 // preprocessor includes them. 295 std::string IncludesAfterPCH; 296 SmallVector<StringRef, 8> AfterPCHLines; 297 Right.split(AfterPCHLines, "\n", /*MaxSplit=*/-1, /*KeepEmpty=*/false); 298 for (unsigned i = 0, e = AfterPCHLines.size(); i != e; ++i) { 299 if (AfterPCHLines[i].startswith("#include ")) { 300 IncludesAfterPCH += AfterPCHLines[i]; 301 IncludesAfterPCH += '\n'; 302 } else { 303 CmdLineLines.push_back(AfterPCHLines[i]); 304 } 305 } 306 307 // Make sure we add the includes last into SuggestedPredefines before we 308 // exit this function. 309 struct AddIncludesRAII { 310 std::string &SuggestedPredefines; 311 std::string &IncludesAfterPCH; 312 313 AddIncludesRAII(std::string &SuggestedPredefines, 314 std::string &IncludesAfterPCH) 315 : SuggestedPredefines(SuggestedPredefines), 316 IncludesAfterPCH(IncludesAfterPCH) { } 317 ~AddIncludesRAII() { 318 SuggestedPredefines += IncludesAfterPCH; 319 } 320 } AddIncludes(SuggestedPredefines, IncludesAfterPCH); 321 322 // Sort both sets of predefined buffer lines, since we allow some extra 323 // definitions and they may appear at any point in the output. 324 std::sort(CmdLineLines.begin(), CmdLineLines.end()); 325 std::sort(PCHLines.begin(), PCHLines.end()); 326 327 // Determine which predefines that were used to build the PCH file are missing 328 // from the command line. 329 std::vector<StringRef> MissingPredefines; 330 std::set_difference(PCHLines.begin(), PCHLines.end(), 331 CmdLineLines.begin(), CmdLineLines.end(), 332 std::back_inserter(MissingPredefines)); 333 334 bool MissingDefines = false; 335 bool ConflictingDefines = false; 336 for (unsigned I = 0, N = MissingPredefines.size(); I != N; ++I) { 337 StringRef Missing = MissingPredefines[I]; 338 if (Missing.startswith("#include ")) { 339 // An -include was specified when generating the PCH; it is included in 340 // the PCH, just ignore it. 341 continue; 342 } 343 if (!Missing.startswith("#define ")) { 344 Reader.Diag(diag::warn_pch_compiler_options_mismatch); 345 return true; 346 } 347 348 // This is a macro definition. Determine the name of the macro we're 349 // defining. 350 std::string::size_type StartOfMacroName = strlen("#define "); 351 std::string::size_type EndOfMacroName 352 = Missing.find_first_of("( \n\r", StartOfMacroName); 353 assert(EndOfMacroName != std::string::npos && 354 "Couldn't find the end of the macro name"); 355 StringRef MacroName = Missing.slice(StartOfMacroName, EndOfMacroName); 356 357 // Determine whether this macro was given a different definition on the 358 // command line. 359 std::string MacroDefStart = "#define " + MacroName.str(); 360 std::string::size_type MacroDefLen = MacroDefStart.size(); 361 SmallVector<StringRef, 8>::iterator ConflictPos 362 = std::lower_bound(CmdLineLines.begin(), CmdLineLines.end(), 363 MacroDefStart); 364 for (; ConflictPos != CmdLineLines.end(); ++ConflictPos) { 365 if (!ConflictPos->startswith(MacroDefStart)) { 366 // Different macro; we're done. 367 ConflictPos = CmdLineLines.end(); 368 break; 369 } 370 371 assert(ConflictPos->size() > MacroDefLen && 372 "Invalid #define in predefines buffer?"); 373 if ((*ConflictPos)[MacroDefLen] != ' ' && 374 (*ConflictPos)[MacroDefLen] != '(') 375 continue; // Longer macro name; keep trying. 376 377 // We found a conflicting macro definition. 378 break; 379 } 380 381 if (ConflictPos != CmdLineLines.end()) { 382 Reader.Diag(diag::warn_cmdline_conflicting_macro_def) 383 << MacroName; 384 385 // Show the definition of this macro within the PCH file. 386 std::pair<FileID, StringRef::size_type> MacroLoc = 387 FindMacro(Buffers, Missing); 388 assert(MacroLoc.second!=StringRef::npos && "Unable to find macro!"); 389 SourceLocation PCHMissingLoc = 390 SourceMgr.getLocForStartOfFile(MacroLoc.first) 391 .getFileLocWithOffset(MacroLoc.second); 392 Reader.Diag(PCHMissingLoc, diag::note_pch_macro_defined_as) << MacroName; 393 394 ConflictingDefines = true; 395 continue; 396 } 397 398 // If the macro doesn't conflict, then we'll just pick up the macro 399 // definition from the PCH file. Warn the user that they made a mistake. 400 if (ConflictingDefines) 401 continue; // Don't complain if there are already conflicting defs 402 403 if (!MissingDefines) { 404 Reader.Diag(diag::warn_cmdline_missing_macro_defs); 405 MissingDefines = true; 406 } 407 408 // Show the definition of this macro within the PCH file. 409 std::pair<FileID, StringRef::size_type> MacroLoc = 410 FindMacro(Buffers, Missing); 411 assert(MacroLoc.second!=StringRef::npos && "Unable to find macro!"); 412 SourceLocation PCHMissingLoc = 413 SourceMgr.getLocForStartOfFile(MacroLoc.first) 414 .getFileLocWithOffset(MacroLoc.second); 415 Reader.Diag(PCHMissingLoc, diag::note_using_macro_def_from_pch); 416 } 417 418 if (ConflictingDefines) 419 return true; 420 421 // Determine what predefines were introduced based on command-line 422 // parameters that were not present when building the PCH 423 // file. Extra #defines are okay, so long as the identifiers being 424 // defined were not used within the precompiled header. 425 std::vector<StringRef> ExtraPredefines; 426 std::set_difference(CmdLineLines.begin(), CmdLineLines.end(), 427 PCHLines.begin(), PCHLines.end(), 428 std::back_inserter(ExtraPredefines)); 429 for (unsigned I = 0, N = ExtraPredefines.size(); I != N; ++I) { 430 StringRef &Extra = ExtraPredefines[I]; 431 if (!Extra.startswith("#define ")) { 432 Reader.Diag(diag::warn_pch_compiler_options_mismatch); 433 return true; 434 } 435 436 // This is an extra macro definition. Determine the name of the 437 // macro we're defining. 438 std::string::size_type StartOfMacroName = strlen("#define "); 439 std::string::size_type EndOfMacroName 440 = Extra.find_first_of("( \n\r", StartOfMacroName); 441 assert(EndOfMacroName != std::string::npos && 442 "Couldn't find the end of the macro name"); 443 StringRef MacroName = Extra.slice(StartOfMacroName, EndOfMacroName); 444 445 // Check whether this name was used somewhere in the PCH file. If 446 // so, defining it as a macro could change behavior, so we reject 447 // the PCH file. 448 if (IdentifierInfo *II = Reader.get(MacroName)) { 449 Reader.Diag(diag::warn_macro_name_used_in_pch) << II; 450 return true; 451 } 452 453 // Add this definition to the suggested predefines buffer. 454 SuggestedPredefines += Extra; 455 SuggestedPredefines += '\n'; 456 } 457 458 // If we get here, it's because the predefines buffer had compatible 459 // contents. Accept the PCH file. 460 return false; 461} 462 463void PCHValidator::ReadHeaderFileInfo(const HeaderFileInfo &HFI, 464 unsigned ID) { 465 PP.getHeaderSearchInfo().setHeaderFileInfoForUID(HFI, ID); 466 ++NumHeaderInfos; 467} 468 469void PCHValidator::ReadCounter(unsigned Value) { 470 PP.setCounterValue(Value); 471} 472 473//===----------------------------------------------------------------------===// 474// AST reader implementation 475//===----------------------------------------------------------------------===// 476 477void 478ASTReader::setDeserializationListener(ASTDeserializationListener *Listener) { 479 DeserializationListener = Listener; 480} 481 482 483namespace { 484class ASTSelectorLookupTrait { 485 ASTReader &Reader; 486 Module &F; 487 488public: 489 struct data_type { 490 SelectorID ID; 491 ObjCMethodList Instance, Factory; 492 }; 493 494 typedef Selector external_key_type; 495 typedef external_key_type internal_key_type; 496 497 ASTSelectorLookupTrait(ASTReader &Reader, Module &F) 498 : Reader(Reader), F(F) { } 499 500 static bool EqualKey(const internal_key_type& a, 501 const internal_key_type& b) { 502 return a == b; 503 } 504 505 static unsigned ComputeHash(Selector Sel) { 506 return serialization::ComputeHash(Sel); 507 } 508 509 // This hopefully will just get inlined and removed by the optimizer. 510 static const internal_key_type& 511 GetInternalKey(const external_key_type& x) { return x; } 512 513 static std::pair<unsigned, unsigned> 514 ReadKeyDataLength(const unsigned char*& d) { 515 using namespace clang::io; 516 unsigned KeyLen = ReadUnalignedLE16(d); 517 unsigned DataLen = ReadUnalignedLE16(d); 518 return std::make_pair(KeyLen, DataLen); 519 } 520 521 internal_key_type ReadKey(const unsigned char* d, unsigned) { 522 using namespace clang::io; 523 SelectorTable &SelTable = Reader.getContext()->Selectors; 524 unsigned N = ReadUnalignedLE16(d); 525 IdentifierInfo *FirstII 526 = Reader.getLocalIdentifier(F, ReadUnalignedLE32(d)); 527 if (N == 0) 528 return SelTable.getNullarySelector(FirstII); 529 else if (N == 1) 530 return SelTable.getUnarySelector(FirstII); 531 532 SmallVector<IdentifierInfo *, 16> Args; 533 Args.push_back(FirstII); 534 for (unsigned I = 1; I != N; ++I) 535 Args.push_back(Reader.getLocalIdentifier(F, ReadUnalignedLE32(d))); 536 537 return SelTable.getSelector(N, Args.data()); 538 } 539 540 data_type ReadData(Selector, const unsigned char* d, unsigned DataLen) { 541 using namespace clang::io; 542 543 data_type Result; 544 545 Result.ID = Reader.getGlobalSelectorID(F, ReadUnalignedLE32(d)); 546 unsigned NumInstanceMethods = ReadUnalignedLE16(d); 547 unsigned NumFactoryMethods = ReadUnalignedLE16(d); 548 549 // Load instance methods 550 ObjCMethodList *Prev = 0; 551 for (unsigned I = 0; I != NumInstanceMethods; ++I) { 552 ObjCMethodDecl *Method 553 = Reader.GetLocalDeclAs<ObjCMethodDecl>(F, ReadUnalignedLE32(d)); 554 if (!Result.Instance.Method) { 555 // This is the first method, which is the easy case. 556 Result.Instance.Method = Method; 557 Prev = &Result.Instance; 558 continue; 559 } 560 561 ObjCMethodList *Mem = 562 Reader.getSema()->BumpAlloc.Allocate<ObjCMethodList>(); 563 Prev->Next = new (Mem) ObjCMethodList(Method, 0); 564 Prev = Prev->Next; 565 } 566 567 // Load factory methods 568 Prev = 0; 569 for (unsigned I = 0; I != NumFactoryMethods; ++I) { 570 ObjCMethodDecl *Method 571 = Reader.GetLocalDeclAs<ObjCMethodDecl>(F, ReadUnalignedLE32(d)); 572 if (!Result.Factory.Method) { 573 // This is the first method, which is the easy case. 574 Result.Factory.Method = Method; 575 Prev = &Result.Factory; 576 continue; 577 } 578 579 ObjCMethodList *Mem = 580 Reader.getSema()->BumpAlloc.Allocate<ObjCMethodList>(); 581 Prev->Next = new (Mem) ObjCMethodList(Method, 0); 582 Prev = Prev->Next; 583 } 584 585 return Result; 586 } 587}; 588 589} // end anonymous namespace 590 591/// \brief The on-disk hash table used for the global method pool. 592typedef OnDiskChainedHashTable<ASTSelectorLookupTrait> 593 ASTSelectorLookupTable; 594 595namespace clang { 596class ASTIdentifierLookupTrait { 597 ASTReader &Reader; 598 Module &F; 599 600 // If we know the IdentifierInfo in advance, it is here and we will 601 // not build a new one. Used when deserializing information about an 602 // identifier that was constructed before the AST file was read. 603 IdentifierInfo *KnownII; 604 605public: 606 typedef IdentifierInfo * data_type; 607 608 typedef const std::pair<const char*, unsigned> external_key_type; 609 610 typedef external_key_type internal_key_type; 611 612 ASTIdentifierLookupTrait(ASTReader &Reader, Module &F, 613 IdentifierInfo *II = 0) 614 : Reader(Reader), F(F), KnownII(II) { } 615 616 static bool EqualKey(const internal_key_type& a, 617 const internal_key_type& b) { 618 return (a.second == b.second) ? memcmp(a.first, b.first, a.second) == 0 619 : false; 620 } 621 622 static unsigned ComputeHash(const internal_key_type& a) { 623 return llvm::HashString(StringRef(a.first, a.second)); 624 } 625 626 // This hopefully will just get inlined and removed by the optimizer. 627 static const internal_key_type& 628 GetInternalKey(const external_key_type& x) { return x; } 629 630 // This hopefully will just get inlined and removed by the optimizer. 631 static const external_key_type& 632 GetExternalKey(const internal_key_type& x) { return x; } 633 634 static std::pair<unsigned, unsigned> 635 ReadKeyDataLength(const unsigned char*& d) { 636 using namespace clang::io; 637 unsigned DataLen = ReadUnalignedLE16(d); 638 unsigned KeyLen = ReadUnalignedLE16(d); 639 return std::make_pair(KeyLen, DataLen); 640 } 641 642 static std::pair<const char*, unsigned> 643 ReadKey(const unsigned char* d, unsigned n) { 644 assert(n >= 2 && d[n-1] == '\0'); 645 return std::make_pair((const char*) d, n-1); 646 } 647 648 IdentifierInfo *ReadData(const internal_key_type& k, 649 const unsigned char* d, 650 unsigned DataLen) { 651 using namespace clang::io; 652 unsigned RawID = ReadUnalignedLE32(d); 653 bool IsInteresting = RawID & 0x01; 654 655 // Wipe out the "is interesting" bit. 656 RawID = RawID >> 1; 657 658 IdentID ID = Reader.getGlobalIdentifierID(F, RawID); 659 if (!IsInteresting) { 660 // For uninteresting identifiers, just build the IdentifierInfo 661 // and associate it with the persistent ID. 662 IdentifierInfo *II = KnownII; 663 if (!II) 664 II = &Reader.getIdentifierTable().getOwn(StringRef(k.first, k.second)); 665 Reader.SetIdentifierInfo(ID, II); 666 II->setIsFromAST(); 667 return II; 668 } 669 670 unsigned Bits = ReadUnalignedLE16(d); 671 bool CPlusPlusOperatorKeyword = Bits & 0x01; 672 Bits >>= 1; 673 bool HasRevertedTokenIDToIdentifier = Bits & 0x01; 674 Bits >>= 1; 675 bool Poisoned = Bits & 0x01; 676 Bits >>= 1; 677 bool ExtensionToken = Bits & 0x01; 678 Bits >>= 1; 679 bool hasMacroDefinition = Bits & 0x01; 680 Bits >>= 1; 681 unsigned ObjCOrBuiltinID = Bits & 0x3FF; 682 Bits >>= 10; 683 684 assert(Bits == 0 && "Extra bits in the identifier?"); 685 DataLen -= 6; 686 687 // Build the IdentifierInfo itself and link the identifier ID with 688 // the new IdentifierInfo. 689 IdentifierInfo *II = KnownII; 690 if (!II) 691 II = &Reader.getIdentifierTable().getOwn(StringRef(k.first, k.second)); 692 Reader.SetIdentifierInfo(ID, II); 693 694 // Set or check the various bits in the IdentifierInfo structure. 695 // Token IDs are read-only. 696 if (HasRevertedTokenIDToIdentifier) 697 II->RevertTokenIDToIdentifier(); 698 II->setObjCOrBuiltinID(ObjCOrBuiltinID); 699 assert(II->isExtensionToken() == ExtensionToken && 700 "Incorrect extension token flag"); 701 (void)ExtensionToken; 702 II->setIsPoisoned(Poisoned); 703 assert(II->isCPlusPlusOperatorKeyword() == CPlusPlusOperatorKeyword && 704 "Incorrect C++ operator keyword flag"); 705 (void)CPlusPlusOperatorKeyword; 706 707 // If this identifier is a macro, deserialize the macro 708 // definition. 709 if (hasMacroDefinition) { 710 uint32_t Offset = ReadUnalignedLE32(d); 711 Reader.SetIdentifierIsMacro(II, F, Offset); 712 DataLen -= 4; 713 } 714 715 // Read all of the declarations visible at global scope with this 716 // name. 717 if (Reader.getContext() == 0) return II; 718 if (DataLen > 0) { 719 SmallVector<uint32_t, 4> DeclIDs; 720 for (; DataLen > 0; DataLen -= 4) 721 DeclIDs.push_back(Reader.getGlobalDeclID(F, ReadUnalignedLE32(d))); 722 Reader.SetGloballyVisibleDecls(II, DeclIDs); 723 } 724 725 II->setIsFromAST(); 726 return II; 727 } 728}; 729 730} // end anonymous namespace 731 732/// \brief The on-disk hash table used to contain information about 733/// all of the identifiers in the program. 734typedef OnDiskChainedHashTable<ASTIdentifierLookupTrait> 735 ASTIdentifierLookupTable; 736 737namespace { 738class ASTDeclContextNameLookupTrait { 739 ASTReader &Reader; 740 Module &F; 741 742public: 743 /// \brief Pair of begin/end iterators for DeclIDs. 744 /// 745 /// Note that these declaration IDs are local to the module that contains this 746 /// particular lookup t 747 typedef std::pair<DeclID *, DeclID *> data_type; 748 749 /// \brief Special internal key for declaration names. 750 /// The hash table creates keys for comparison; we do not create 751 /// a DeclarationName for the internal key to avoid deserializing types. 752 struct DeclNameKey { 753 DeclarationName::NameKind Kind; 754 uint64_t Data; 755 DeclNameKey() : Kind((DeclarationName::NameKind)0), Data(0) { } 756 }; 757 758 typedef DeclarationName external_key_type; 759 typedef DeclNameKey internal_key_type; 760 761 explicit ASTDeclContextNameLookupTrait(ASTReader &Reader, 762 Module &F) 763 : Reader(Reader), F(F) { } 764 765 static bool EqualKey(const internal_key_type& a, 766 const internal_key_type& b) { 767 return a.Kind == b.Kind && a.Data == b.Data; 768 } 769 770 unsigned ComputeHash(const DeclNameKey &Key) const { 771 llvm::FoldingSetNodeID ID; 772 ID.AddInteger(Key.Kind); 773 774 switch (Key.Kind) { 775 case DeclarationName::Identifier: 776 case DeclarationName::CXXLiteralOperatorName: 777 ID.AddString(((IdentifierInfo*)Key.Data)->getName()); 778 break; 779 case DeclarationName::ObjCZeroArgSelector: 780 case DeclarationName::ObjCOneArgSelector: 781 case DeclarationName::ObjCMultiArgSelector: 782 ID.AddInteger(serialization::ComputeHash(Selector(Key.Data))); 783 break; 784 case DeclarationName::CXXOperatorName: 785 ID.AddInteger((OverloadedOperatorKind)Key.Data); 786 break; 787 case DeclarationName::CXXConstructorName: 788 case DeclarationName::CXXDestructorName: 789 case DeclarationName::CXXConversionFunctionName: 790 case DeclarationName::CXXUsingDirective: 791 break; 792 } 793 794 return ID.ComputeHash(); 795 } 796 797 internal_key_type GetInternalKey(const external_key_type& Name) const { 798 DeclNameKey Key; 799 Key.Kind = Name.getNameKind(); 800 switch (Name.getNameKind()) { 801 case DeclarationName::Identifier: 802 Key.Data = (uint64_t)Name.getAsIdentifierInfo(); 803 break; 804 case DeclarationName::ObjCZeroArgSelector: 805 case DeclarationName::ObjCOneArgSelector: 806 case DeclarationName::ObjCMultiArgSelector: 807 Key.Data = (uint64_t)Name.getObjCSelector().getAsOpaquePtr(); 808 break; 809 case DeclarationName::CXXOperatorName: 810 Key.Data = Name.getCXXOverloadedOperator(); 811 break; 812 case DeclarationName::CXXLiteralOperatorName: 813 Key.Data = (uint64_t)Name.getCXXLiteralIdentifier(); 814 break; 815 case DeclarationName::CXXConstructorName: 816 case DeclarationName::CXXDestructorName: 817 case DeclarationName::CXXConversionFunctionName: 818 case DeclarationName::CXXUsingDirective: 819 Key.Data = 0; 820 break; 821 } 822 823 return Key; 824 } 825 826 external_key_type GetExternalKey(const internal_key_type& Key) const { 827 ASTContext *Context = Reader.getContext(); 828 switch (Key.Kind) { 829 case DeclarationName::Identifier: 830 return DeclarationName((IdentifierInfo*)Key.Data); 831 832 case DeclarationName::ObjCZeroArgSelector: 833 case DeclarationName::ObjCOneArgSelector: 834 case DeclarationName::ObjCMultiArgSelector: 835 return DeclarationName(Selector(Key.Data)); 836 837 case DeclarationName::CXXConstructorName: 838 return Context->DeclarationNames.getCXXConstructorName( 839 Context->getCanonicalType(Reader.getLocalType(F, Key.Data))); 840 841 case DeclarationName::CXXDestructorName: 842 return Context->DeclarationNames.getCXXDestructorName( 843 Context->getCanonicalType(Reader.getLocalType(F, Key.Data))); 844 845 case DeclarationName::CXXConversionFunctionName: 846 return Context->DeclarationNames.getCXXConversionFunctionName( 847 Context->getCanonicalType(Reader.getLocalType(F, Key.Data))); 848 849 case DeclarationName::CXXOperatorName: 850 return Context->DeclarationNames.getCXXOperatorName( 851 (OverloadedOperatorKind)Key.Data); 852 853 case DeclarationName::CXXLiteralOperatorName: 854 return Context->DeclarationNames.getCXXLiteralOperatorName( 855 (IdentifierInfo*)Key.Data); 856 857 case DeclarationName::CXXUsingDirective: 858 return DeclarationName::getUsingDirectiveName(); 859 } 860 861 llvm_unreachable("Invalid Name Kind ?"); 862 } 863 864 static std::pair<unsigned, unsigned> 865 ReadKeyDataLength(const unsigned char*& d) { 866 using namespace clang::io; 867 unsigned KeyLen = ReadUnalignedLE16(d); 868 unsigned DataLen = ReadUnalignedLE16(d); 869 return std::make_pair(KeyLen, DataLen); 870 } 871 872 internal_key_type ReadKey(const unsigned char* d, unsigned) { 873 using namespace clang::io; 874 875 DeclNameKey Key; 876 Key.Kind = (DeclarationName::NameKind)*d++; 877 switch (Key.Kind) { 878 case DeclarationName::Identifier: 879 Key.Data = (uint64_t)Reader.getLocalIdentifier(F, ReadUnalignedLE32(d)); 880 break; 881 case DeclarationName::ObjCZeroArgSelector: 882 case DeclarationName::ObjCOneArgSelector: 883 case DeclarationName::ObjCMultiArgSelector: 884 Key.Data = 885 (uint64_t)Reader.getLocalSelector(F, ReadUnalignedLE32(d)) 886 .getAsOpaquePtr(); 887 break; 888 case DeclarationName::CXXOperatorName: 889 Key.Data = *d++; // OverloadedOperatorKind 890 break; 891 case DeclarationName::CXXLiteralOperatorName: 892 Key.Data = (uint64_t)Reader.getLocalIdentifier(F, ReadUnalignedLE32(d)); 893 break; 894 case DeclarationName::CXXConstructorName: 895 case DeclarationName::CXXDestructorName: 896 case DeclarationName::CXXConversionFunctionName: 897 case DeclarationName::CXXUsingDirective: 898 Key.Data = 0; 899 break; 900 } 901 902 return Key; 903 } 904 905 data_type ReadData(internal_key_type, const unsigned char* d, 906 unsigned DataLen) { 907 using namespace clang::io; 908 unsigned NumDecls = ReadUnalignedLE16(d); 909 DeclID *Start = (DeclID *)d; 910 return std::make_pair(Start, Start + NumDecls); 911 } 912}; 913 914} // end anonymous namespace 915 916/// \brief The on-disk hash table used for the DeclContext's Name lookup table. 917typedef OnDiskChainedHashTable<ASTDeclContextNameLookupTrait> 918 ASTDeclContextNameLookupTable; 919 920bool ASTReader::ReadDeclContextStorage(llvm::BitstreamCursor &Cursor, 921 const std::pair<uint64_t, uint64_t> &Offsets, 922 DeclContextInfo &Info) { 923 SavedStreamPosition SavedPosition(Cursor); 924 // First the lexical decls. 925 if (Offsets.first != 0) { 926 Cursor.JumpToBit(Offsets.first); 927 928 RecordData Record; 929 const char *Blob; 930 unsigned BlobLen; 931 unsigned Code = Cursor.ReadCode(); 932 unsigned RecCode = Cursor.ReadRecord(Code, Record, &Blob, &BlobLen); 933 if (RecCode != DECL_CONTEXT_LEXICAL) { 934 Error("Expected lexical block"); 935 return true; 936 } 937 938 Info.LexicalDecls = reinterpret_cast<const KindDeclIDPair*>(Blob); 939 Info.NumLexicalDecls = BlobLen / sizeof(KindDeclIDPair); 940 } else { 941 Info.LexicalDecls = 0; 942 Info.NumLexicalDecls = 0; 943 } 944 945 // Now the lookup table. 946 if (Offsets.second != 0) { 947 Cursor.JumpToBit(Offsets.second); 948 949 RecordData Record; 950 const char *Blob; 951 unsigned BlobLen; 952 unsigned Code = Cursor.ReadCode(); 953 unsigned RecCode = Cursor.ReadRecord(Code, Record, &Blob, &BlobLen); 954 if (RecCode != DECL_CONTEXT_VISIBLE) { 955 Error("Expected visible lookup table block"); 956 return true; 957 } 958 Info.NameLookupTableData 959 = ASTDeclContextNameLookupTable::Create( 960 (const unsigned char *)Blob + Record[0], 961 (const unsigned char *)Blob, 962 ASTDeclContextNameLookupTrait(*this, *Info.F)); 963 } else { 964 Info.NameLookupTableData = 0; 965 } 966 967 return false; 968} 969 970void ASTReader::Error(StringRef Msg) { 971 Error(diag::err_fe_pch_malformed, Msg); 972} 973 974void ASTReader::Error(unsigned DiagID, 975 StringRef Arg1, StringRef Arg2) { 976 if (Diags.isDiagnosticInFlight()) 977 Diags.SetDelayedDiagnostic(DiagID, Arg1, Arg2); 978 else 979 Diag(DiagID) << Arg1 << Arg2; 980} 981 982/// \brief Tell the AST listener about the predefines buffers in the chain. 983bool ASTReader::CheckPredefinesBuffers() { 984 if (Listener) 985 return Listener->ReadPredefinesBuffer(PCHPredefinesBuffers, 986 ActualOriginalFileName, 987 SuggestedPredefines, 988 FileMgr); 989 return false; 990} 991 992//===----------------------------------------------------------------------===// 993// Source Manager Deserialization 994//===----------------------------------------------------------------------===// 995 996/// \brief Read the line table in the source manager block. 997/// \returns true if there was an error. 998bool ASTReader::ParseLineTable(Module &F, 999 SmallVectorImpl<uint64_t> &Record) { 1000 unsigned Idx = 0; 1001 LineTableInfo &LineTable = SourceMgr.getLineTable(); 1002 1003 // Parse the file names 1004 std::map<int, int> FileIDs; 1005 for (int I = 0, N = Record[Idx++]; I != N; ++I) { 1006 // Extract the file name 1007 unsigned FilenameLen = Record[Idx++]; 1008 std::string Filename(&Record[Idx], &Record[Idx] + FilenameLen); 1009 Idx += FilenameLen; 1010 MaybeAddSystemRootToFilename(Filename); 1011 FileIDs[I] = LineTable.getLineTableFilenameID(Filename); 1012 } 1013 1014 // Parse the line entries 1015 std::vector<LineEntry> Entries; 1016 while (Idx < Record.size()) { 1017 int FID = Record[Idx++]; 1018 assert(FID >= 0 && "Serialized line entries for non-local file."); 1019 // Remap FileID from 1-based old view. 1020 FID += F.SLocEntryBaseID - 1; 1021 1022 // Extract the line entries 1023 unsigned NumEntries = Record[Idx++]; 1024 assert(NumEntries && "Numentries is 00000"); 1025 Entries.clear(); 1026 Entries.reserve(NumEntries); 1027 for (unsigned I = 0; I != NumEntries; ++I) { 1028 unsigned FileOffset = Record[Idx++]; 1029 unsigned LineNo = Record[Idx++]; 1030 int FilenameID = FileIDs[Record[Idx++]]; 1031 SrcMgr::CharacteristicKind FileKind 1032 = (SrcMgr::CharacteristicKind)Record[Idx++]; 1033 unsigned IncludeOffset = Record[Idx++]; 1034 Entries.push_back(LineEntry::get(FileOffset, LineNo, FilenameID, 1035 FileKind, IncludeOffset)); 1036 } 1037 LineTable.AddEntry(FID, Entries); 1038 } 1039 1040 return false; 1041} 1042 1043namespace { 1044 1045class ASTStatData { 1046public: 1047 const ino_t ino; 1048 const dev_t dev; 1049 const mode_t mode; 1050 const time_t mtime; 1051 const off_t size; 1052 1053 ASTStatData(ino_t i, dev_t d, mode_t mo, time_t m, off_t s) 1054 : ino(i), dev(d), mode(mo), mtime(m), size(s) {} 1055}; 1056 1057class ASTStatLookupTrait { 1058 public: 1059 typedef const char *external_key_type; 1060 typedef const char *internal_key_type; 1061 1062 typedef ASTStatData data_type; 1063 1064 static unsigned ComputeHash(const char *path) { 1065 return llvm::HashString(path); 1066 } 1067 1068 static internal_key_type GetInternalKey(const char *path) { return path; } 1069 1070 static bool EqualKey(internal_key_type a, internal_key_type b) { 1071 return strcmp(a, b) == 0; 1072 } 1073 1074 static std::pair<unsigned, unsigned> 1075 ReadKeyDataLength(const unsigned char*& d) { 1076 unsigned KeyLen = (unsigned) clang::io::ReadUnalignedLE16(d); 1077 unsigned DataLen = (unsigned) *d++; 1078 return std::make_pair(KeyLen + 1, DataLen); 1079 } 1080 1081 static internal_key_type ReadKey(const unsigned char *d, unsigned) { 1082 return (const char *)d; 1083 } 1084 1085 static data_type ReadData(const internal_key_type, const unsigned char *d, 1086 unsigned /*DataLen*/) { 1087 using namespace clang::io; 1088 1089 ino_t ino = (ino_t) ReadUnalignedLE32(d); 1090 dev_t dev = (dev_t) ReadUnalignedLE32(d); 1091 mode_t mode = (mode_t) ReadUnalignedLE16(d); 1092 time_t mtime = (time_t) ReadUnalignedLE64(d); 1093 off_t size = (off_t) ReadUnalignedLE64(d); 1094 return data_type(ino, dev, mode, mtime, size); 1095 } 1096}; 1097 1098/// \brief stat() cache for precompiled headers. 1099/// 1100/// This cache is very similar to the stat cache used by pretokenized 1101/// headers. 1102class ASTStatCache : public FileSystemStatCache { 1103 typedef OnDiskChainedHashTable<ASTStatLookupTrait> CacheTy; 1104 CacheTy *Cache; 1105 1106 unsigned &NumStatHits, &NumStatMisses; 1107public: 1108 ASTStatCache(const unsigned char *Buckets, const unsigned char *Base, 1109 unsigned &NumStatHits, unsigned &NumStatMisses) 1110 : Cache(0), NumStatHits(NumStatHits), NumStatMisses(NumStatMisses) { 1111 Cache = CacheTy::Create(Buckets, Base); 1112 } 1113 1114 ~ASTStatCache() { delete Cache; } 1115 1116 LookupResult getStat(const char *Path, struct stat &StatBuf, 1117 int *FileDescriptor) { 1118 // Do the lookup for the file's data in the AST file. 1119 CacheTy::iterator I = Cache->find(Path); 1120 1121 // If we don't get a hit in the AST file just forward to 'stat'. 1122 if (I == Cache->end()) { 1123 ++NumStatMisses; 1124 return statChained(Path, StatBuf, FileDescriptor); 1125 } 1126 1127 ++NumStatHits; 1128 ASTStatData Data = *I; 1129 1130 StatBuf.st_ino = Data.ino; 1131 StatBuf.st_dev = Data.dev; 1132 StatBuf.st_mtime = Data.mtime; 1133 StatBuf.st_mode = Data.mode; 1134 StatBuf.st_size = Data.size; 1135 return CacheExists; 1136 } 1137}; 1138} // end anonymous namespace 1139 1140 1141/// \brief Read a source manager block 1142ASTReader::ASTReadResult ASTReader::ReadSourceManagerBlock(Module &F) { 1143 using namespace SrcMgr; 1144 1145 llvm::BitstreamCursor &SLocEntryCursor = F.SLocEntryCursor; 1146 1147 // Set the source-location entry cursor to the current position in 1148 // the stream. This cursor will be used to read the contents of the 1149 // source manager block initially, and then lazily read 1150 // source-location entries as needed. 1151 SLocEntryCursor = F.Stream; 1152 1153 // The stream itself is going to skip over the source manager block. 1154 if (F.Stream.SkipBlock()) { 1155 Error("malformed block record in AST file"); 1156 return Failure; 1157 } 1158 1159 // Enter the source manager block. 1160 if (SLocEntryCursor.EnterSubBlock(SOURCE_MANAGER_BLOCK_ID)) { 1161 Error("malformed source manager block record in AST file"); 1162 return Failure; 1163 } 1164 1165 RecordData Record; 1166 while (true) { 1167 unsigned Code = SLocEntryCursor.ReadCode(); 1168 if (Code == llvm::bitc::END_BLOCK) { 1169 if (SLocEntryCursor.ReadBlockEnd()) { 1170 Error("error at end of Source Manager block in AST file"); 1171 return Failure; 1172 } 1173 return Success; 1174 } 1175 1176 if (Code == llvm::bitc::ENTER_SUBBLOCK) { 1177 // No known subblocks, always skip them. 1178 SLocEntryCursor.ReadSubBlockID(); 1179 if (SLocEntryCursor.SkipBlock()) { 1180 Error("malformed block record in AST file"); 1181 return Failure; 1182 } 1183 continue; 1184 } 1185 1186 if (Code == llvm::bitc::DEFINE_ABBREV) { 1187 SLocEntryCursor.ReadAbbrevRecord(); 1188 continue; 1189 } 1190 1191 // Read a record. 1192 const char *BlobStart; 1193 unsigned BlobLen; 1194 Record.clear(); 1195 switch (SLocEntryCursor.ReadRecord(Code, Record, &BlobStart, &BlobLen)) { 1196 default: // Default behavior: ignore. 1197 break; 1198 1199 case SM_SLOC_FILE_ENTRY: 1200 case SM_SLOC_BUFFER_ENTRY: 1201 case SM_SLOC_EXPANSION_ENTRY: 1202 // Once we hit one of the source location entries, we're done. 1203 return Success; 1204 } 1205 } 1206} 1207 1208/// \brief If a header file is not found at the path that we expect it to be 1209/// and the PCH file was moved from its original location, try to resolve the 1210/// file by assuming that header+PCH were moved together and the header is in 1211/// the same place relative to the PCH. 1212static std::string 1213resolveFileRelativeToOriginalDir(const std::string &Filename, 1214 const std::string &OriginalDir, 1215 const std::string &CurrDir) { 1216 assert(OriginalDir != CurrDir && 1217 "No point trying to resolve the file if the PCH dir didn't change"); 1218 using namespace llvm::sys; 1219 llvm::SmallString<128> filePath(Filename); 1220 fs::make_absolute(filePath); 1221 assert(path::is_absolute(OriginalDir)); 1222 llvm::SmallString<128> currPCHPath(CurrDir); 1223 1224 path::const_iterator fileDirI = path::begin(path::parent_path(filePath)), 1225 fileDirE = path::end(path::parent_path(filePath)); 1226 path::const_iterator origDirI = path::begin(OriginalDir), 1227 origDirE = path::end(OriginalDir); 1228 // Skip the common path components from filePath and OriginalDir. 1229 while (fileDirI != fileDirE && origDirI != origDirE && 1230 *fileDirI == *origDirI) { 1231 ++fileDirI; 1232 ++origDirI; 1233 } 1234 for (; origDirI != origDirE; ++origDirI) 1235 path::append(currPCHPath, ".."); 1236 path::append(currPCHPath, fileDirI, fileDirE); 1237 path::append(currPCHPath, path::filename(Filename)); 1238 return currPCHPath.str(); 1239} 1240 1241/// \brief Read in the source location entry with the given ID. 1242ASTReader::ASTReadResult ASTReader::ReadSLocEntryRecord(int ID) { 1243 if (ID == 0) 1244 return Success; 1245 1246 if (unsigned(-ID) - 2 >= getTotalNumSLocs() || ID > 0) { 1247 Error("source location entry ID out-of-range for AST file"); 1248 return Failure; 1249 } 1250 1251 Module *F = GlobalSLocEntryMap.find(-ID)->second; 1252 F->SLocEntryCursor.JumpToBit(F->SLocEntryOffsets[ID - F->SLocEntryBaseID]); 1253 llvm::BitstreamCursor &SLocEntryCursor = F->SLocEntryCursor; 1254 unsigned BaseOffset = F->SLocEntryBaseOffset; 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 Error(diag::err_fe_pch_file_modified, Filename); 1311 return Failure; 1312 } 1313 1314 SourceLocation IncludeLoc = ReadSourceLocation(*F, Record[1]); 1315 if (IncludeLoc.isInvalid() && F->Kind != MK_MainFile) { 1316 // This is the module's main file. 1317 IncludeLoc = getImportLocation(F); 1318 } 1319 FileID FID = SourceMgr.createFileID(File, IncludeLoc, 1320 (SrcMgr::CharacteristicKind)Record[2], 1321 ID, BaseOffset + Record[0]); 1322 if (Record[3]) 1323 const_cast<SrcMgr::FileInfo&>(SourceMgr.getSLocEntry(FID).getFile()) 1324 .setHasLineDirectives(); 1325 1326 break; 1327 } 1328 1329 case SM_SLOC_BUFFER_ENTRY: { 1330 const char *Name = BlobStart; 1331 unsigned Offset = Record[0]; 1332 unsigned Code = SLocEntryCursor.ReadCode(); 1333 Record.clear(); 1334 unsigned RecCode 1335 = SLocEntryCursor.ReadRecord(Code, Record, &BlobStart, &BlobLen); 1336 1337 if (RecCode != SM_SLOC_BUFFER_BLOB) { 1338 Error("AST record has invalid code"); 1339 return Failure; 1340 } 1341 1342 llvm::MemoryBuffer *Buffer 1343 = llvm::MemoryBuffer::getMemBuffer(StringRef(BlobStart, BlobLen - 1), 1344 Name); 1345 FileID BufferID = SourceMgr.createFileIDForMemBuffer(Buffer, ID, 1346 BaseOffset + Offset); 1347 1348 if (strcmp(Name, "<built-in>") == 0) { 1349 PCHPredefinesBlock Block = { 1350 BufferID, 1351 StringRef(BlobStart, BlobLen - 1) 1352 }; 1353 PCHPredefinesBuffers.push_back(Block); 1354 } 1355 1356 break; 1357 } 1358 1359 case SM_SLOC_EXPANSION_ENTRY: { 1360 SourceLocation SpellingLoc = ReadSourceLocation(*F, Record[1]); 1361 SourceMgr.createExpansionLoc(SpellingLoc, 1362 ReadSourceLocation(*F, Record[2]), 1363 ReadSourceLocation(*F, Record[3]), 1364 Record[4], 1365 ID, 1366 BaseOffset + Record[0]); 1367 break; 1368 } 1369 } 1370 1371 return Success; 1372} 1373 1374/// \brief Find the location where the module F is imported. 1375SourceLocation ASTReader::getImportLocation(Module *F) { 1376 if (F->ImportLoc.isValid()) 1377 return F->ImportLoc; 1378 1379 // Otherwise we have a PCH. It's considered to be "imported" at the first 1380 // location of its includer. 1381 if (F->ImportedBy.empty() || !F->ImportedBy[0]) { 1382 // Main file is the importer. We assume that it is the first entry in the 1383 // entry table. We can't ask the manager, because at the time of PCH loading 1384 // the main file entry doesn't exist yet. 1385 // The very first entry is the invalid instantiation loc, which takes up 1386 // offsets 0 and 1. 1387 return SourceLocation::getFromRawEncoding(2U); 1388 } 1389 //return F->Loaders[0]->FirstLoc; 1390 return F->ImportedBy[0]->FirstLoc; 1391} 1392 1393/// ReadBlockAbbrevs - Enter a subblock of the specified BlockID with the 1394/// specified cursor. Read the abbreviations that are at the top of the block 1395/// and then leave the cursor pointing into the block. 1396bool ASTReader::ReadBlockAbbrevs(llvm::BitstreamCursor &Cursor, 1397 unsigned BlockID) { 1398 if (Cursor.EnterSubBlock(BlockID)) { 1399 Error("malformed block record in AST file"); 1400 return Failure; 1401 } 1402 1403 while (true) { 1404 uint64_t Offset = Cursor.GetCurrentBitNo(); 1405 unsigned Code = Cursor.ReadCode(); 1406 1407 // We expect all abbrevs to be at the start of the block. 1408 if (Code != llvm::bitc::DEFINE_ABBREV) { 1409 Cursor.JumpToBit(Offset); 1410 return false; 1411 } 1412 Cursor.ReadAbbrevRecord(); 1413 } 1414} 1415 1416void ASTReader::ReadMacroRecord(Module &F, uint64_t Offset) { 1417 assert(PP && "Forgot to set Preprocessor ?"); 1418 llvm::BitstreamCursor &Stream = F.MacroCursor; 1419 1420 // Keep track of where we are in the stream, then jump back there 1421 // after reading this macro. 1422 SavedStreamPosition SavedPosition(Stream); 1423 1424 Stream.JumpToBit(Offset); 1425 RecordData Record; 1426 SmallVector<IdentifierInfo*, 16> MacroArgs; 1427 MacroInfo *Macro = 0; 1428 1429 while (true) { 1430 unsigned Code = Stream.ReadCode(); 1431 switch (Code) { 1432 case llvm::bitc::END_BLOCK: 1433 return; 1434 1435 case llvm::bitc::ENTER_SUBBLOCK: 1436 // No known subblocks, always skip them. 1437 Stream.ReadSubBlockID(); 1438 if (Stream.SkipBlock()) { 1439 Error("malformed block record in AST file"); 1440 return; 1441 } 1442 continue; 1443 1444 case llvm::bitc::DEFINE_ABBREV: 1445 Stream.ReadAbbrevRecord(); 1446 continue; 1447 default: break; 1448 } 1449 1450 // Read a record. 1451 const char *BlobStart = 0; 1452 unsigned BlobLen = 0; 1453 Record.clear(); 1454 PreprocessorRecordTypes RecType = 1455 (PreprocessorRecordTypes)Stream.ReadRecord(Code, Record, BlobStart, 1456 BlobLen); 1457 switch (RecType) { 1458 case PP_MACRO_OBJECT_LIKE: 1459 case PP_MACRO_FUNCTION_LIKE: { 1460 // If we already have a macro, that means that we've hit the end 1461 // of the definition of the macro we were looking for. We're 1462 // done. 1463 if (Macro) 1464 return; 1465 1466 IdentifierInfo *II = getLocalIdentifier(F, Record[0]); 1467 if (II == 0) { 1468 Error("macro must have a name in AST file"); 1469 return; 1470 } 1471 SourceLocation Loc = ReadSourceLocation(F, Record[1]); 1472 bool isUsed = Record[2]; 1473 1474 MacroInfo *MI = PP->AllocateMacroInfo(Loc); 1475 MI->setIsUsed(isUsed); 1476 MI->setIsFromAST(); 1477 1478 unsigned NextIndex = 3; 1479 if (RecType == PP_MACRO_FUNCTION_LIKE) { 1480 // Decode function-like macro info. 1481 bool isC99VarArgs = Record[3]; 1482 bool isGNUVarArgs = Record[4]; 1483 MacroArgs.clear(); 1484 unsigned NumArgs = Record[5]; 1485 NextIndex = 6 + NumArgs; 1486 for (unsigned i = 0; i != NumArgs; ++i) 1487 MacroArgs.push_back(getLocalIdentifier(F, Record[6+i])); 1488 1489 // Install function-like macro info. 1490 MI->setIsFunctionLike(); 1491 if (isC99VarArgs) MI->setIsC99Varargs(); 1492 if (isGNUVarArgs) MI->setIsGNUVarargs(); 1493 MI->setArgumentList(MacroArgs.data(), MacroArgs.size(), 1494 PP->getPreprocessorAllocator()); 1495 } 1496 1497 // Finally, install the macro. 1498 PP->setMacroInfo(II, MI); 1499 1500 // Remember that we saw this macro last so that we add the tokens that 1501 // form its body to it. 1502 Macro = MI; 1503 1504 if (NextIndex + 1 == Record.size() && PP->getPreprocessingRecord()) { 1505 // We have a macro definition. Load it now. 1506 PP->getPreprocessingRecord()->RegisterMacroDefinition(Macro, 1507 getLocalMacroDefinition(F, Record[NextIndex])); 1508 } 1509 1510 ++NumMacrosRead; 1511 break; 1512 } 1513 1514 case PP_TOKEN: { 1515 // If we see a TOKEN before a PP_MACRO_*, then the file is 1516 // erroneous, just pretend we didn't see this. 1517 if (Macro == 0) break; 1518 1519 Token Tok; 1520 Tok.startToken(); 1521 Tok.setLocation(ReadSourceLocation(F, Record[0])); 1522 Tok.setLength(Record[1]); 1523 if (IdentifierInfo *II = getLocalIdentifier(F, Record[2])) 1524 Tok.setIdentifierInfo(II); 1525 Tok.setKind((tok::TokenKind)Record[3]); 1526 Tok.setFlag((Token::TokenFlags)Record[4]); 1527 Macro->AddTokenToBody(Tok); 1528 break; 1529 } 1530 } 1531 } 1532 1533 return; 1534} 1535 1536PreprocessedEntity *ASTReader::LoadPreprocessedEntity(Module &F) { 1537 assert(PP && "Forgot to set Preprocessor ?"); 1538 unsigned Code = F.PreprocessorDetailCursor.ReadCode(); 1539 switch (Code) { 1540 case llvm::bitc::END_BLOCK: 1541 return 0; 1542 1543 case llvm::bitc::ENTER_SUBBLOCK: 1544 Error("unexpected subblock record in preprocessor detail block"); 1545 return 0; 1546 1547 case llvm::bitc::DEFINE_ABBREV: 1548 Error("unexpected abbrevation record in preprocessor detail block"); 1549 return 0; 1550 1551 default: 1552 break; 1553 } 1554 1555 if (!PP->getPreprocessingRecord()) { 1556 Error("no preprocessing record"); 1557 return 0; 1558 } 1559 1560 // Read the record. 1561 PreprocessingRecord &PPRec = *PP->getPreprocessingRecord(); 1562 const char *BlobStart = 0; 1563 unsigned BlobLen = 0; 1564 RecordData Record; 1565 PreprocessorDetailRecordTypes RecType = 1566 (PreprocessorDetailRecordTypes)F.PreprocessorDetailCursor.ReadRecord( 1567 Code, Record, BlobStart, BlobLen); 1568 switch (RecType) { 1569 case PPD_MACRO_EXPANSION: { 1570 PreprocessedEntityID GlobalID = getGlobalPreprocessedEntityID(F, Record[0]); 1571 if (PreprocessedEntity *PE = PPRec.getLoadedPreprocessedEntity(GlobalID-1)) 1572 return PE; 1573 1574 MacroExpansion *ME = 1575 new (PPRec) MacroExpansion(getLocalIdentifier(F, Record[3]), 1576 SourceRange(ReadSourceLocation(F, Record[1]), 1577 ReadSourceLocation(F, Record[2])), 1578 getLocalMacroDefinition(F, Record[4])); 1579 PPRec.setLoadedPreallocatedEntity(GlobalID - 1, ME); 1580 return ME; 1581 } 1582 1583 case PPD_MACRO_DEFINITION: { 1584 PreprocessedEntityID GlobalID = getGlobalPreprocessedEntityID(F, Record[0]); 1585 if (PreprocessedEntity *PE = PPRec.getLoadedPreprocessedEntity(GlobalID-1)) 1586 return PE; 1587 1588 unsigned MacroDefID = getGlobalMacroDefinitionID(F, Record[1]); 1589 if (MacroDefID > MacroDefinitionsLoaded.size()) { 1590 Error("out-of-bounds macro definition record"); 1591 return 0; 1592 } 1593 1594 // Decode the identifier info and then check again; if the macro is 1595 // still defined and associated with the identifier, 1596 IdentifierInfo *II = getLocalIdentifier(F, Record[4]); 1597 if (!MacroDefinitionsLoaded[MacroDefID - 1]) { 1598 MacroDefinition *MD 1599 = new (PPRec) MacroDefinition(II, 1600 ReadSourceLocation(F, Record[5]), 1601 SourceRange( 1602 ReadSourceLocation(F, Record[2]), 1603 ReadSourceLocation(F, Record[3]))); 1604 1605 PPRec.setLoadedPreallocatedEntity(GlobalID - 1, MD); 1606 MacroDefinitionsLoaded[MacroDefID - 1] = MD; 1607 1608 if (DeserializationListener) 1609 DeserializationListener->MacroDefinitionRead(MacroDefID, MD); 1610 } 1611 1612 return MacroDefinitionsLoaded[MacroDefID - 1]; 1613 } 1614 1615 case PPD_INCLUSION_DIRECTIVE: { 1616 PreprocessedEntityID GlobalID = getGlobalPreprocessedEntityID(F, Record[0]); 1617 if (PreprocessedEntity *PE = PPRec.getLoadedPreprocessedEntity(GlobalID-1)) 1618 return PE; 1619 1620 const char *FullFileNameStart = BlobStart + Record[3]; 1621 const FileEntry *File 1622 = PP->getFileManager().getFile(StringRef(FullFileNameStart, 1623 BlobLen - Record[3])); 1624 1625 // FIXME: Stable encoding 1626 InclusionDirective::InclusionKind Kind 1627 = static_cast<InclusionDirective::InclusionKind>(Record[5]); 1628 InclusionDirective *ID 1629 = new (PPRec) InclusionDirective(PPRec, Kind, 1630 StringRef(BlobStart, Record[3]), 1631 Record[4], 1632 File, 1633 SourceRange(ReadSourceLocation(F, Record[1]), 1634 ReadSourceLocation(F, Record[2]))); 1635 PPRec.setLoadedPreallocatedEntity(GlobalID - 1, ID); 1636 return ID; 1637 } 1638 } 1639 1640 Error("invalid offset in preprocessor detail block"); 1641 return 0; 1642} 1643 1644PreprocessedEntityID 1645ASTReader::getGlobalPreprocessedEntityID(Module &M, unsigned LocalID) { 1646 ContinuousRangeMap<uint32_t, int, 2>::iterator 1647 I = M.PreprocessedEntityRemap.find(LocalID - NUM_PREDEF_PP_ENTITY_IDS); 1648 assert(I != M.PreprocessedEntityRemap.end() 1649 && "Invalid index into preprocessed entity index remap"); 1650 1651 return LocalID + I->second; 1652} 1653 1654namespace { 1655 /// \brief Trait class used to search the on-disk hash table containing all of 1656 /// the header search information. 1657 /// 1658 /// The on-disk hash table contains a mapping from each header path to 1659 /// information about that header (how many times it has been included, its 1660 /// controlling macro, etc.). Note that we actually hash based on the 1661 /// filename, and support "deep" comparisons of file names based on current 1662 /// inode numbers, so that the search can cope with non-normalized path names 1663 /// and symlinks. 1664 class HeaderFileInfoTrait { 1665 ASTReader &Reader; 1666 Module &M; 1667 HeaderSearch *HS; 1668 const char *FrameworkStrings; 1669 const char *SearchPath; 1670 struct stat SearchPathStatBuf; 1671 llvm::Optional<int> SearchPathStatResult; 1672 1673 int StatSimpleCache(const char *Path, struct stat *StatBuf) { 1674 if (Path == SearchPath) { 1675 if (!SearchPathStatResult) 1676 SearchPathStatResult = stat(Path, &SearchPathStatBuf); 1677 1678 *StatBuf = SearchPathStatBuf; 1679 return *SearchPathStatResult; 1680 } 1681 1682 return stat(Path, StatBuf); 1683 } 1684 1685 public: 1686 typedef const char *external_key_type; 1687 typedef const char *internal_key_type; 1688 1689 typedef HeaderFileInfo data_type; 1690 1691 HeaderFileInfoTrait(ASTReader &Reader, Module &M, HeaderSearch *HS, 1692 const char *FrameworkStrings, 1693 const char *SearchPath = 0) 1694 : Reader(Reader), M(M), HS(HS), FrameworkStrings(FrameworkStrings), 1695 SearchPath(SearchPath) { } 1696 1697 static unsigned ComputeHash(const char *path) { 1698 return llvm::HashString(llvm::sys::path::filename(path)); 1699 } 1700 1701 static internal_key_type GetInternalKey(const char *path) { return path; } 1702 1703 bool EqualKey(internal_key_type a, internal_key_type b) { 1704 if (strcmp(a, b) == 0) 1705 return true; 1706 1707 if (llvm::sys::path::filename(a) != llvm::sys::path::filename(b)) 1708 return false; 1709 1710 // The file names match, but the path names don't. stat() the files to 1711 // see if they are the same. 1712 struct stat StatBufA, StatBufB; 1713 if (StatSimpleCache(a, &StatBufA) || StatSimpleCache(b, &StatBufB)) 1714 return false; 1715 1716 return StatBufA.st_ino == StatBufB.st_ino; 1717 } 1718 1719 static std::pair<unsigned, unsigned> 1720 ReadKeyDataLength(const unsigned char*& d) { 1721 unsigned KeyLen = (unsigned) clang::io::ReadUnalignedLE16(d); 1722 unsigned DataLen = (unsigned) *d++; 1723 return std::make_pair(KeyLen + 1, DataLen); 1724 } 1725 1726 static internal_key_type ReadKey(const unsigned char *d, unsigned) { 1727 return (const char *)d; 1728 } 1729 1730 data_type ReadData(const internal_key_type, const unsigned char *d, 1731 unsigned DataLen) { 1732 const unsigned char *End = d + DataLen; 1733 using namespace clang::io; 1734 HeaderFileInfo HFI; 1735 unsigned Flags = *d++; 1736 HFI.isImport = (Flags >> 5) & 0x01; 1737 HFI.isPragmaOnce = (Flags >> 4) & 0x01; 1738 HFI.DirInfo = (Flags >> 2) & 0x03; 1739 HFI.Resolved = (Flags >> 1) & 0x01; 1740 HFI.IndexHeaderMapHeader = Flags & 0x01; 1741 HFI.NumIncludes = ReadUnalignedLE16(d); 1742 HFI.ControllingMacroID = Reader.getGlobalDeclID(M, ReadUnalignedLE32(d)); 1743 if (unsigned FrameworkOffset = ReadUnalignedLE32(d)) { 1744 // The framework offset is 1 greater than the actual offset, 1745 // since 0 is used as an indicator for "no framework name". 1746 StringRef FrameworkName(FrameworkStrings + FrameworkOffset - 1); 1747 HFI.Framework = HS->getUniqueFrameworkName(FrameworkName); 1748 } 1749 1750 assert(End == d && "Wrong data length in HeaderFileInfo deserialization"); 1751 (void)End; 1752 1753 // This HeaderFileInfo was externally loaded. 1754 HFI.External = true; 1755 return HFI; 1756 } 1757 }; 1758} 1759 1760/// \brief The on-disk hash table used for the global method pool. 1761typedef OnDiskChainedHashTable<HeaderFileInfoTrait> 1762 HeaderFileInfoLookupTable; 1763 1764void ASTReader::SetIdentifierIsMacro(IdentifierInfo *II, Module &F, 1765 uint64_t LocalOffset) { 1766 // Note that this identifier has a macro definition. 1767 II->setHasMacroDefinition(true); 1768 1769 // Adjust the offset to a global offset. 1770 UnreadMacroRecordOffsets[II] = F.GlobalBitOffset + LocalOffset; 1771} 1772 1773void ASTReader::ReadDefinedMacros() { 1774 for (ModuleReverseIterator I = ModuleMgr.rbegin(), 1775 E = ModuleMgr.rend(); I != E; ++I) { 1776 llvm::BitstreamCursor &MacroCursor = (*I)->MacroCursor; 1777 1778 // If there was no preprocessor block, skip this file. 1779 if (!MacroCursor.getBitStreamReader()) 1780 continue; 1781 1782 llvm::BitstreamCursor Cursor = MacroCursor; 1783 Cursor.JumpToBit((*I)->MacroStartOffset); 1784 1785 RecordData Record; 1786 while (true) { 1787 unsigned Code = Cursor.ReadCode(); 1788 if (Code == llvm::bitc::END_BLOCK) 1789 break; 1790 1791 if (Code == llvm::bitc::ENTER_SUBBLOCK) { 1792 // No known subblocks, always skip them. 1793 Cursor.ReadSubBlockID(); 1794 if (Cursor.SkipBlock()) { 1795 Error("malformed block record in AST file"); 1796 return; 1797 } 1798 continue; 1799 } 1800 1801 if (Code == llvm::bitc::DEFINE_ABBREV) { 1802 Cursor.ReadAbbrevRecord(); 1803 continue; 1804 } 1805 1806 // Read a record. 1807 const char *BlobStart; 1808 unsigned BlobLen; 1809 Record.clear(); 1810 switch (Cursor.ReadRecord(Code, Record, &BlobStart, &BlobLen)) { 1811 default: // Default behavior: ignore. 1812 break; 1813 1814 case PP_MACRO_OBJECT_LIKE: 1815 case PP_MACRO_FUNCTION_LIKE: 1816 getLocalIdentifier(**I, Record[0]); 1817 break; 1818 1819 case PP_TOKEN: 1820 // Ignore tokens. 1821 break; 1822 } 1823 } 1824 } 1825 1826 // Drain the unread macro-record offsets map. 1827 while (!UnreadMacroRecordOffsets.empty()) 1828 LoadMacroDefinition(UnreadMacroRecordOffsets.begin()); 1829} 1830 1831void ASTReader::LoadMacroDefinition( 1832 llvm::DenseMap<IdentifierInfo *, uint64_t>::iterator Pos) { 1833 assert(Pos != UnreadMacroRecordOffsets.end() && "Unknown macro definition"); 1834 uint64_t Offset = Pos->second; 1835 UnreadMacroRecordOffsets.erase(Pos); 1836 1837 RecordLocation Loc = getLocalBitOffset(Offset); 1838 ReadMacroRecord(*Loc.F, Loc.Offset); 1839} 1840 1841void ASTReader::LoadMacroDefinition(IdentifierInfo *II) { 1842 llvm::DenseMap<IdentifierInfo *, uint64_t>::iterator Pos 1843 = UnreadMacroRecordOffsets.find(II); 1844 LoadMacroDefinition(Pos); 1845} 1846 1847MacroDefinition *ASTReader::getMacroDefinition(MacroID ID) { 1848 if (ID == 0 || ID > MacroDefinitionsLoaded.size()) 1849 return 0; 1850 1851 if (!MacroDefinitionsLoaded[ID - 1]) { 1852 GlobalMacroDefinitionMapType::iterator I =GlobalMacroDefinitionMap.find(ID); 1853 assert(I != GlobalMacroDefinitionMap.end() && 1854 "Corrupted global macro definition map"); 1855 Module &M = *I->second; 1856 unsigned Index = ID - 1 - M.BaseMacroDefinitionID; 1857 SavedStreamPosition SavedPosition(M.PreprocessorDetailCursor); 1858 M.PreprocessorDetailCursor.JumpToBit(M.MacroDefinitionOffsets[Index]); 1859 LoadPreprocessedEntity(M); 1860 } 1861 1862 return MacroDefinitionsLoaded[ID - 1]; 1863} 1864 1865const FileEntry *ASTReader::getFileEntry(StringRef filenameStrRef) { 1866 std::string Filename = filenameStrRef; 1867 MaybeAddSystemRootToFilename(Filename); 1868 const FileEntry *File = FileMgr.getFile(Filename); 1869 if (File == 0 && !OriginalDir.empty() && !CurrentDir.empty() && 1870 OriginalDir != CurrentDir) { 1871 std::string resolved = resolveFileRelativeToOriginalDir(Filename, 1872 OriginalDir, 1873 CurrentDir); 1874 if (!resolved.empty()) 1875 File = FileMgr.getFile(resolved); 1876 } 1877 1878 return File; 1879} 1880 1881MacroID ASTReader::getGlobalMacroDefinitionID(Module &M, unsigned LocalID) { 1882 if (LocalID < NUM_PREDEF_MACRO_IDS) 1883 return LocalID; 1884 1885 ContinuousRangeMap<uint32_t, int, 2>::iterator I 1886 = M.MacroDefinitionRemap.find(LocalID - NUM_PREDEF_MACRO_IDS); 1887 assert(I != M.MacroDefinitionRemap.end() && 1888 "Invalid index into macro definition ID remap"); 1889 1890 return LocalID + I->second; 1891} 1892 1893/// \brief If we are loading a relocatable PCH file, and the filename is 1894/// not an absolute path, add the system root to the beginning of the file 1895/// name. 1896void ASTReader::MaybeAddSystemRootToFilename(std::string &Filename) { 1897 // If this is not a relocatable PCH file, there's nothing to do. 1898 if (!RelocatablePCH) 1899 return; 1900 1901 if (Filename.empty() || llvm::sys::path::is_absolute(Filename)) 1902 return; 1903 1904 if (isysroot.empty()) { 1905 // If no system root was given, default to '/' 1906 Filename.insert(Filename.begin(), '/'); 1907 return; 1908 } 1909 1910 unsigned Length = isysroot.size(); 1911 if (isysroot[Length - 1] != '/') 1912 Filename.insert(Filename.begin(), '/'); 1913 1914 Filename.insert(Filename.begin(), isysroot.begin(), isysroot.end()); 1915} 1916 1917ASTReader::ASTReadResult 1918ASTReader::ReadASTBlock(Module &F) { 1919 llvm::BitstreamCursor &Stream = F.Stream; 1920 1921 if (Stream.EnterSubBlock(AST_BLOCK_ID)) { 1922 Error("malformed block record in AST file"); 1923 return Failure; 1924 } 1925 1926 // Read all of the records and blocks for the ASt file. 1927 RecordData Record; 1928 bool First = true; 1929 while (!Stream.AtEndOfStream()) { 1930 unsigned Code = Stream.ReadCode(); 1931 if (Code == llvm::bitc::END_BLOCK) { 1932 if (Stream.ReadBlockEnd()) { 1933 Error("error at end of module block in AST file"); 1934 return Failure; 1935 } 1936 1937 return Success; 1938 } 1939 1940 if (Code == llvm::bitc::ENTER_SUBBLOCK) { 1941 switch (Stream.ReadSubBlockID()) { 1942 case DECLTYPES_BLOCK_ID: 1943 // We lazily load the decls block, but we want to set up the 1944 // DeclsCursor cursor to point into it. Clone our current bitcode 1945 // cursor to it, enter the block and read the abbrevs in that block. 1946 // With the main cursor, we just skip over it. 1947 F.DeclsCursor = Stream; 1948 if (Stream.SkipBlock() || // Skip with the main cursor. 1949 // Read the abbrevs. 1950 ReadBlockAbbrevs(F.DeclsCursor, DECLTYPES_BLOCK_ID)) { 1951 Error("malformed block record in AST file"); 1952 return Failure; 1953 } 1954 break; 1955 1956 case DECL_UPDATES_BLOCK_ID: 1957 if (Stream.SkipBlock()) { 1958 Error("malformed block record in AST file"); 1959 return Failure; 1960 } 1961 break; 1962 1963 case PREPROCESSOR_BLOCK_ID: 1964 F.MacroCursor = Stream; 1965 if (PP) 1966 PP->setExternalSource(this); 1967 1968 if (Stream.SkipBlock() || 1969 ReadBlockAbbrevs(F.MacroCursor, PREPROCESSOR_BLOCK_ID)) { 1970 Error("malformed block record in AST file"); 1971 return Failure; 1972 } 1973 F.MacroStartOffset = F.MacroCursor.GetCurrentBitNo(); 1974 break; 1975 1976 case PREPROCESSOR_DETAIL_BLOCK_ID: 1977 F.PreprocessorDetailCursor = Stream; 1978 if (Stream.SkipBlock() || 1979 ReadBlockAbbrevs(F.PreprocessorDetailCursor, 1980 PREPROCESSOR_DETAIL_BLOCK_ID)) { 1981 Error("malformed preprocessor detail record in AST file"); 1982 return Failure; 1983 } 1984 F.PreprocessorDetailStartOffset 1985 = F.PreprocessorDetailCursor.GetCurrentBitNo(); 1986 break; 1987 1988 case SOURCE_MANAGER_BLOCK_ID: 1989 switch (ReadSourceManagerBlock(F)) { 1990 case Success: 1991 break; 1992 1993 case Failure: 1994 Error("malformed source manager block in AST file"); 1995 return Failure; 1996 1997 case IgnorePCH: 1998 return IgnorePCH; 1999 } 2000 break; 2001 } 2002 First = false; 2003 continue; 2004 } 2005 2006 if (Code == llvm::bitc::DEFINE_ABBREV) { 2007 Stream.ReadAbbrevRecord(); 2008 continue; 2009 } 2010 2011 // Read and process a record. 2012 Record.clear(); 2013 const char *BlobStart = 0; 2014 unsigned BlobLen = 0; 2015 switch ((ASTRecordTypes)Stream.ReadRecord(Code, Record, 2016 &BlobStart, &BlobLen)) { 2017 default: // Default behavior: ignore. 2018 break; 2019 2020 case METADATA: { 2021 if (Record[0] != VERSION_MAJOR && !DisableValidation) { 2022 Diag(Record[0] < VERSION_MAJOR? diag::warn_pch_version_too_old 2023 : diag::warn_pch_version_too_new); 2024 return IgnorePCH; 2025 } 2026 2027 RelocatablePCH = Record[4]; 2028 if (Listener) { 2029 std::string TargetTriple(BlobStart, BlobLen); 2030 if (Listener->ReadTargetTriple(TargetTriple)) 2031 return IgnorePCH; 2032 } 2033 break; 2034 } 2035 2036 case IMPORTS: { 2037 // Load each of the imported PCH files. 2038 unsigned Idx = 0, N = Record.size(); 2039 while (Idx < N) { 2040 // Read information about the AST file. 2041 ModuleKind ImportedKind = (ModuleKind)Record[Idx++]; 2042 unsigned Length = Record[Idx++]; 2043 llvm::SmallString<128> ImportedFile(Record.begin() + Idx, 2044 Record.begin() + Idx + Length); 2045 Idx += Length; 2046 2047 // Load the AST file. 2048 switch(ReadASTCore(ImportedFile, ImportedKind)) { 2049 case Failure: return Failure; 2050 // If we have to ignore the dependency, we'll have to ignore this too. 2051 case IgnorePCH: return IgnorePCH; 2052 case Success: break; 2053 } 2054 } 2055 break; 2056 } 2057 2058 case TYPE_OFFSET: { 2059 if (F.LocalNumTypes != 0) { 2060 Error("duplicate TYPE_OFFSET record in AST file"); 2061 return Failure; 2062 } 2063 F.TypeOffsets = (const uint32_t *)BlobStart; 2064 F.LocalNumTypes = Record[0]; 2065 unsigned LocalBaseTypeIndex = Record[1]; 2066 F.BaseTypeIndex = getTotalNumTypes(); 2067 2068 if (F.LocalNumTypes > 0) { 2069 // Introduce the global -> local mapping for types within this module. 2070 GlobalTypeMap.insert(std::make_pair(getTotalNumTypes(), &F)); 2071 2072 // Introduce the local -> global mapping for types within this module. 2073 F.TypeRemap.insert(std::make_pair(LocalBaseTypeIndex, 2074 F.BaseTypeIndex - LocalBaseTypeIndex)); 2075 2076 TypesLoaded.resize(TypesLoaded.size() + F.LocalNumTypes); 2077 } 2078 break; 2079 } 2080 2081 case DECL_OFFSET: { 2082 if (F.LocalNumDecls != 0) { 2083 Error("duplicate DECL_OFFSET record in AST file"); 2084 return Failure; 2085 } 2086 F.DeclOffsets = (const uint32_t *)BlobStart; 2087 F.LocalNumDecls = Record[0]; 2088 unsigned LocalBaseDeclID = Record[1]; 2089 F.BaseDeclID = getTotalNumDecls(); 2090 2091 if (F.LocalNumDecls > 0) { 2092 // Introduce the global -> local mapping for declarations within this 2093 // module. 2094 GlobalDeclMap.insert( 2095 std::make_pair(getTotalNumDecls() + NUM_PREDEF_DECL_IDS, &F)); 2096 2097 // Introduce the local -> global mapping for declarations within this 2098 // module. 2099 F.DeclRemap.insert(std::make_pair(LocalBaseDeclID, 2100 F.BaseDeclID - LocalBaseDeclID)); 2101 2102 DeclsLoaded.resize(DeclsLoaded.size() + F.LocalNumDecls); 2103 } 2104 break; 2105 } 2106 2107 case TU_UPDATE_LEXICAL: { 2108 DeclContextInfo Info = { 2109 &F, 2110 /* No visible information */ 0, 2111 reinterpret_cast<const KindDeclIDPair *>(BlobStart), 2112 static_cast<unsigned int>(BlobLen / sizeof(KindDeclIDPair)) 2113 }; 2114 2115 DeclContext *TU = Context ? Context->getTranslationUnitDecl() : 0; 2116 DeclContextOffsets[TU].push_back(Info); 2117 if (TU) 2118 TU->setHasExternalLexicalStorage(true); 2119 2120 break; 2121 } 2122 2123 case UPDATE_VISIBLE: { 2124 unsigned Idx = 0; 2125 serialization::DeclID ID = ReadDeclID(F, Record, Idx); 2126 void *Table = ASTDeclContextNameLookupTable::Create( 2127 (const unsigned char *)BlobStart + Record[Idx++], 2128 (const unsigned char *)BlobStart, 2129 ASTDeclContextNameLookupTrait(*this, F)); 2130 // FIXME: Complete hack to check for the TU 2131 if (ID == PREDEF_DECL_TRANSLATION_UNIT_ID && Context) { // Is it the TU? 2132 DeclContextInfo Info = { 2133 &F, Table, /* No lexical information */ 0, 0 2134 }; 2135 2136 DeclContext *TU = Context->getTranslationUnitDecl(); 2137 DeclContextOffsets[TU].push_back(Info); 2138 TU->setHasExternalVisibleStorage(true); 2139 } else 2140 PendingVisibleUpdates[ID].push_back(std::make_pair(Table, &F)); 2141 break; 2142 } 2143 2144 case REDECLS_UPDATE_LATEST: { 2145 assert(Record.size() % 2 == 0 && "Expected pairs of DeclIDs"); 2146 for (unsigned i = 0, e = Record.size(); i < e; /* in loop */) { 2147 DeclID First = ReadDeclID(F, Record, i); 2148 DeclID Latest = ReadDeclID(F, Record, i); 2149 FirstLatestDeclIDs[First] = Latest; 2150 } 2151 break; 2152 } 2153 2154 case LANGUAGE_OPTIONS: 2155 if (ParseLanguageOptions(Record) && !DisableValidation) 2156 return IgnorePCH; 2157 break; 2158 2159 case IDENTIFIER_TABLE: 2160 F.IdentifierTableData = BlobStart; 2161 if (Record[0]) { 2162 F.IdentifierLookupTable 2163 = ASTIdentifierLookupTable::Create( 2164 (const unsigned char *)F.IdentifierTableData + Record[0], 2165 (const unsigned char *)F.IdentifierTableData, 2166 ASTIdentifierLookupTrait(*this, F)); 2167 if (PP) { 2168 PP->getIdentifierTable().setExternalIdentifierLookup(this); 2169 PP->getHeaderSearchInfo().SetExternalLookup(this); 2170 } 2171 } 2172 break; 2173 2174 case IDENTIFIER_OFFSET: { 2175 if (F.LocalNumIdentifiers != 0) { 2176 Error("duplicate IDENTIFIER_OFFSET record in AST file"); 2177 return Failure; 2178 } 2179 F.IdentifierOffsets = (const uint32_t *)BlobStart; 2180 F.LocalNumIdentifiers = Record[0]; 2181 unsigned LocalBaseIdentifierID = Record[1]; 2182 F.BaseIdentifierID = getTotalNumIdentifiers(); 2183 2184 if (F.LocalNumIdentifiers > 0) { 2185 // Introduce the global -> local mapping for identifiers within this 2186 // module. 2187 GlobalIdentifierMap.insert(std::make_pair(getTotalNumIdentifiers() + 1, 2188 &F)); 2189 2190 // Introduce the local -> global mapping for identifiers within this 2191 // module. 2192 F.IdentifierRemap.insert( 2193 std::make_pair(LocalBaseIdentifierID, 2194 F.BaseIdentifierID - LocalBaseIdentifierID)); 2195 2196 IdentifiersLoaded.resize(IdentifiersLoaded.size() 2197 + F.LocalNumIdentifiers); 2198 } 2199 break; 2200 } 2201 2202 case EXTERNAL_DEFINITIONS: 2203 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2204 ExternalDefinitions.push_back(getGlobalDeclID(F, Record[I])); 2205 break; 2206 2207 case SPECIAL_TYPES: 2208 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2209 SpecialTypes.push_back(getGlobalTypeID(F, Record[I])); 2210 break; 2211 2212 case STATISTICS: 2213 TotalNumStatements += Record[0]; 2214 TotalNumMacros += Record[1]; 2215 TotalLexicalDeclContexts += Record[2]; 2216 TotalVisibleDeclContexts += Record[3]; 2217 break; 2218 2219 case UNUSED_FILESCOPED_DECLS: 2220 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2221 UnusedFileScopedDecls.push_back(getGlobalDeclID(F, Record[I])); 2222 break; 2223 2224 case DELEGATING_CTORS: 2225 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2226 DelegatingCtorDecls.push_back(getGlobalDeclID(F, Record[I])); 2227 break; 2228 2229 case WEAK_UNDECLARED_IDENTIFIERS: 2230 if (Record.size() % 4 != 0) { 2231 Error("invalid weak identifiers record"); 2232 return Failure; 2233 } 2234 2235 // FIXME: Ignore weak undeclared identifiers from non-original PCH 2236 // files. This isn't the way to do it :) 2237 WeakUndeclaredIdentifiers.clear(); 2238 2239 // Translate the weak, undeclared identifiers into global IDs. 2240 for (unsigned I = 0, N = Record.size(); I < N; /* in loop */) { 2241 WeakUndeclaredIdentifiers.push_back( 2242 getGlobalIdentifierID(F, Record[I++])); 2243 WeakUndeclaredIdentifiers.push_back( 2244 getGlobalIdentifierID(F, Record[I++])); 2245 WeakUndeclaredIdentifiers.push_back( 2246 ReadSourceLocation(F, Record, I).getRawEncoding()); 2247 WeakUndeclaredIdentifiers.push_back(Record[I++]); 2248 } 2249 break; 2250 2251 case LOCALLY_SCOPED_EXTERNAL_DECLS: 2252 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2253 LocallyScopedExternalDecls.push_back(getGlobalDeclID(F, Record[I])); 2254 break; 2255 2256 case SELECTOR_OFFSETS: { 2257 F.SelectorOffsets = (const uint32_t *)BlobStart; 2258 F.LocalNumSelectors = Record[0]; 2259 unsigned LocalBaseSelectorID = Record[1]; 2260 F.BaseSelectorID = getTotalNumSelectors(); 2261 2262 if (F.LocalNumSelectors > 0) { 2263 // Introduce the global -> local mapping for selectors within this 2264 // module. 2265 GlobalSelectorMap.insert(std::make_pair(getTotalNumSelectors()+1, &F)); 2266 2267 // Introduce the local -> global mapping for selectors within this 2268 // module. 2269 F.SelectorRemap.insert(std::make_pair(LocalBaseSelectorID, 2270 F.BaseSelectorID - LocalBaseSelectorID)); 2271 2272 SelectorsLoaded.resize(SelectorsLoaded.size() + F.LocalNumSelectors); 2273 } 2274 break; 2275 } 2276 2277 case METHOD_POOL: 2278 F.SelectorLookupTableData = (const unsigned char *)BlobStart; 2279 if (Record[0]) 2280 F.SelectorLookupTable 2281 = ASTSelectorLookupTable::Create( 2282 F.SelectorLookupTableData + Record[0], 2283 F.SelectorLookupTableData, 2284 ASTSelectorLookupTrait(*this, F)); 2285 TotalNumMethodPoolEntries += Record[1]; 2286 break; 2287 2288 case REFERENCED_SELECTOR_POOL: 2289 if (!Record.empty()) { 2290 for (unsigned Idx = 0, N = Record.size() - 1; Idx < N; /* in loop */) { 2291 ReferencedSelectorsData.push_back(getGlobalSelectorID(F, 2292 Record[Idx++])); 2293 ReferencedSelectorsData.push_back(ReadSourceLocation(F, Record, Idx). 2294 getRawEncoding()); 2295 } 2296 } 2297 break; 2298 2299 case PP_COUNTER_VALUE: 2300 if (!Record.empty() && Listener) 2301 Listener->ReadCounter(Record[0]); 2302 break; 2303 2304 case SOURCE_LOCATION_OFFSETS: { 2305 F.SLocEntryOffsets = (const uint32_t *)BlobStart; 2306 F.LocalNumSLocEntries = Record[0]; 2307 llvm::tie(F.SLocEntryBaseID, F.SLocEntryBaseOffset) = 2308 SourceMgr.AllocateLoadedSLocEntries(F.LocalNumSLocEntries, Record[1]); 2309 // Make our entry in the range map. BaseID is negative and growing, so 2310 // we invert it. Because we invert it, though, we need the other end of 2311 // the range. 2312 unsigned RangeStart = 2313 unsigned(-F.SLocEntryBaseID) - F.LocalNumSLocEntries + 1; 2314 GlobalSLocEntryMap.insert(std::make_pair(RangeStart, &F)); 2315 F.FirstLoc = SourceLocation::getFromRawEncoding(F.SLocEntryBaseOffset); 2316 2317 // Initialize the remapping table. 2318 // Invalid stays invalid. 2319 F.SLocRemap.insert(std::make_pair(0U, 0)); 2320 // This module. Base was 2 when being compiled. 2321 F.SLocRemap.insert(std::make_pair(2U, 2322 static_cast<int>(F.SLocEntryBaseOffset - 2))); 2323 2324 TotalNumSLocEntries += F.LocalNumSLocEntries; 2325 break; 2326 } 2327 2328 case MODULE_OFFSET_MAP: { 2329 // Additional remapping information. 2330 const unsigned char *Data = (const unsigned char*)BlobStart; 2331 const unsigned char *DataEnd = Data + BlobLen; 2332 2333 // Continuous range maps we may be updating in our module. 2334 ContinuousRangeMap<uint32_t, int, 2>::Builder SLocRemap(F.SLocRemap); 2335 ContinuousRangeMap<uint32_t, int, 2>::Builder 2336 IdentifierRemap(F.IdentifierRemap); 2337 ContinuousRangeMap<uint32_t, int, 2>::Builder 2338 PreprocessedEntityRemap(F.PreprocessedEntityRemap); 2339 ContinuousRangeMap<uint32_t, int, 2>::Builder 2340 MacroDefinitionRemap(F.MacroDefinitionRemap); 2341 ContinuousRangeMap<uint32_t, int, 2>::Builder 2342 SelectorRemap(F.SelectorRemap); 2343 ContinuousRangeMap<uint32_t, int, 2>::Builder DeclRemap(F.DeclRemap); 2344 ContinuousRangeMap<uint32_t, int, 2>::Builder TypeRemap(F.TypeRemap); 2345 2346 while(Data < DataEnd) { 2347 uint16_t Len = io::ReadUnalignedLE16(Data); 2348 StringRef Name = StringRef((const char*)Data, Len); 2349 Data += Len; 2350 Module *OM = ModuleMgr.lookup(Name); 2351 if (!OM) { 2352 Error("SourceLocation remap refers to unknown module"); 2353 return Failure; 2354 } 2355 2356 uint32_t SLocOffset = io::ReadUnalignedLE32(Data); 2357 uint32_t IdentifierIDOffset = io::ReadUnalignedLE32(Data); 2358 uint32_t PreprocessedEntityIDOffset = io::ReadUnalignedLE32(Data); 2359 uint32_t MacroDefinitionIDOffset = io::ReadUnalignedLE32(Data); 2360 uint32_t SelectorIDOffset = io::ReadUnalignedLE32(Data); 2361 uint32_t DeclIDOffset = io::ReadUnalignedLE32(Data); 2362 uint32_t TypeIndexOffset = io::ReadUnalignedLE32(Data); 2363 2364 // Source location offset is mapped to OM->SLocEntryBaseOffset. 2365 SLocRemap.insert(std::make_pair(SLocOffset, 2366 static_cast<int>(OM->SLocEntryBaseOffset - SLocOffset))); 2367 IdentifierRemap.insert( 2368 std::make_pair(IdentifierIDOffset, 2369 OM->BaseIdentifierID - IdentifierIDOffset)); 2370 PreprocessedEntityRemap.insert( 2371 std::make_pair(PreprocessedEntityIDOffset, 2372 OM->BasePreprocessedEntityID - PreprocessedEntityIDOffset)); 2373 MacroDefinitionRemap.insert( 2374 std::make_pair(MacroDefinitionIDOffset, 2375 OM->BaseMacroDefinitionID - MacroDefinitionIDOffset)); 2376 SelectorRemap.insert(std::make_pair(SelectorIDOffset, 2377 OM->BaseSelectorID - SelectorIDOffset)); 2378 DeclRemap.insert(std::make_pair(DeclIDOffset, 2379 OM->BaseDeclID - DeclIDOffset)); 2380 2381 TypeRemap.insert(std::make_pair(TypeIndexOffset, 2382 OM->BaseTypeIndex - TypeIndexOffset)); 2383 } 2384 break; 2385 } 2386 2387 case SOURCE_MANAGER_LINE_TABLE: 2388 if (ParseLineTable(F, Record)) 2389 return Failure; 2390 break; 2391 2392 case FILE_SOURCE_LOCATION_OFFSETS: 2393 F.SLocFileOffsets = (const uint32_t *)BlobStart; 2394 F.LocalNumSLocFileEntries = Record[0]; 2395 break; 2396 2397 case SOURCE_LOCATION_PRELOADS: { 2398 // Need to transform from the local view (1-based IDs) to the global view, 2399 // which is based off F.SLocEntryBaseID. 2400 PreloadSLocEntries.reserve(PreloadSLocEntries.size() + Record.size()); 2401 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2402 PreloadSLocEntries.push_back(int(Record[I] - 1) + F.SLocEntryBaseID); 2403 break; 2404 } 2405 2406 case STAT_CACHE: { 2407 if (!DisableStatCache) { 2408 ASTStatCache *MyStatCache = 2409 new ASTStatCache((const unsigned char *)BlobStart + Record[0], 2410 (const unsigned char *)BlobStart, 2411 NumStatHits, NumStatMisses); 2412 FileMgr.addStatCache(MyStatCache); 2413 F.StatCache = MyStatCache; 2414 } 2415 break; 2416 } 2417 2418 case EXT_VECTOR_DECLS: 2419 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2420 ExtVectorDecls.push_back(getGlobalDeclID(F, Record[I])); 2421 break; 2422 2423 case VTABLE_USES: 2424 if (Record.size() % 3 != 0) { 2425 Error("Invalid VTABLE_USES record"); 2426 return Failure; 2427 } 2428 2429 // Later tables overwrite earlier ones. 2430 // FIXME: Modules will have some trouble with this. This is clearly not 2431 // the right way to do this. 2432 VTableUses.clear(); 2433 2434 for (unsigned Idx = 0, N = Record.size(); Idx != N; /* In loop */) { 2435 VTableUses.push_back(getGlobalDeclID(F, Record[Idx++])); 2436 VTableUses.push_back( 2437 ReadSourceLocation(F, Record, Idx).getRawEncoding()); 2438 VTableUses.push_back(Record[Idx++]); 2439 } 2440 break; 2441 2442 case DYNAMIC_CLASSES: 2443 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2444 DynamicClasses.push_back(getGlobalDeclID(F, Record[I])); 2445 break; 2446 2447 case PENDING_IMPLICIT_INSTANTIATIONS: 2448 if (PendingInstantiations.size() % 2 != 0) { 2449 Error("Invalid PENDING_IMPLICIT_INSTANTIATIONS block"); 2450 return Failure; 2451 } 2452 2453 // Later lists of pending instantiations overwrite earlier ones. 2454 // FIXME: This is most certainly wrong for modules. 2455 PendingInstantiations.clear(); 2456 for (unsigned I = 0, N = Record.size(); I != N; /* in loop */) { 2457 PendingInstantiations.push_back(getGlobalDeclID(F, Record[I++])); 2458 PendingInstantiations.push_back( 2459 ReadSourceLocation(F, Record, I).getRawEncoding()); 2460 } 2461 break; 2462 2463 case SEMA_DECL_REFS: 2464 // Later tables overwrite earlier ones. 2465 // FIXME: Modules will have some trouble with this. 2466 SemaDeclRefs.clear(); 2467 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2468 SemaDeclRefs.push_back(getGlobalDeclID(F, Record[I])); 2469 break; 2470 2471 case ORIGINAL_FILE_NAME: 2472 // The primary AST will be the last to get here, so it will be the one 2473 // that's used. 2474 ActualOriginalFileName.assign(BlobStart, BlobLen); 2475 OriginalFileName = ActualOriginalFileName; 2476 MaybeAddSystemRootToFilename(OriginalFileName); 2477 break; 2478 2479 case ORIGINAL_FILE_ID: 2480 OriginalFileID = FileID::get(Record[0]); 2481 break; 2482 2483 case ORIGINAL_PCH_DIR: 2484 // The primary AST will be the last to get here, so it will be the one 2485 // that's used. 2486 OriginalDir.assign(BlobStart, BlobLen); 2487 break; 2488 2489 case VERSION_CONTROL_BRANCH_REVISION: { 2490 const std::string &CurBranch = getClangFullRepositoryVersion(); 2491 StringRef ASTBranch(BlobStart, BlobLen); 2492 if (StringRef(CurBranch) != ASTBranch && !DisableValidation) { 2493 Diag(diag::warn_pch_different_branch) << ASTBranch << CurBranch; 2494 return IgnorePCH; 2495 } 2496 break; 2497 } 2498 2499 case MACRO_DEFINITION_OFFSETS: { 2500 F.MacroDefinitionOffsets = (const uint32_t *)BlobStart; 2501 F.NumPreallocatedPreprocessingEntities = Record[0]; 2502 unsigned LocalBasePreprocessedEntityID = Record[1]; 2503 F.LocalNumMacroDefinitions = Record[2]; 2504 unsigned LocalBaseMacroID = Record[3]; 2505 2506 unsigned StartingID; 2507 if (PP) { 2508 if (!PP->getPreprocessingRecord()) 2509 PP->createPreprocessingRecord(true); 2510 if (!PP->getPreprocessingRecord()->getExternalSource()) 2511 PP->getPreprocessingRecord()->SetExternalSource(*this); 2512 StartingID 2513 = PP->getPreprocessingRecord() 2514 ->allocateLoadedEntities(F.NumPreallocatedPreprocessingEntities); 2515 } else { 2516 // FIXME: We'll eventually want to kill this path, since it assumes 2517 // a particular allocation strategy in the preprocessing record. 2518 StartingID = getTotalNumPreprocessedEntities() 2519 - F.NumPreallocatedPreprocessingEntities; 2520 } 2521 F.BaseMacroDefinitionID = getTotalNumMacroDefinitions(); 2522 F.BasePreprocessedEntityID = StartingID; 2523 2524 if (F.NumPreallocatedPreprocessingEntities > 0) { 2525 // Introduce the global -> local mapping for preprocessed entities in 2526 // this module. 2527 GlobalPreprocessedEntityMap.insert(std::make_pair(StartingID, &F)); 2528 2529 // Introduce the local -> global mapping for preprocessed entities in 2530 // this module. 2531 F.PreprocessedEntityRemap.insert( 2532 std::make_pair(LocalBasePreprocessedEntityID, 2533 F.BasePreprocessedEntityID - LocalBasePreprocessedEntityID)); 2534 } 2535 2536 2537 if (F.LocalNumMacroDefinitions > 0) { 2538 // Introduce the global -> local mapping for macro definitions within 2539 // this module. 2540 GlobalMacroDefinitionMap.insert( 2541 std::make_pair(getTotalNumMacroDefinitions() + 1, &F)); 2542 2543 // Introduce the local -> global mapping for macro definitions within 2544 // this module. 2545 F.MacroDefinitionRemap.insert( 2546 std::make_pair(LocalBaseMacroID, 2547 F.BaseMacroDefinitionID - LocalBaseMacroID)); 2548 2549 MacroDefinitionsLoaded.resize( 2550 MacroDefinitionsLoaded.size() + F.LocalNumMacroDefinitions); 2551 } 2552 2553 break; 2554 } 2555 2556 case DECL_UPDATE_OFFSETS: { 2557 if (Record.size() % 2 != 0) { 2558 Error("invalid DECL_UPDATE_OFFSETS block in AST file"); 2559 return Failure; 2560 } 2561 for (unsigned I = 0, N = Record.size(); I != N; I += 2) 2562 DeclUpdateOffsets[getGlobalDeclID(F, Record[I])] 2563 .push_back(std::make_pair(&F, Record[I+1])); 2564 break; 2565 } 2566 2567 case DECL_REPLACEMENTS: { 2568 if (Record.size() % 2 != 0) { 2569 Error("invalid DECL_REPLACEMENTS block in AST file"); 2570 return Failure; 2571 } 2572 for (unsigned I = 0, N = Record.size(); I != N; I += 2) 2573 ReplacedDecls[getGlobalDeclID(F, Record[I])] 2574 = std::make_pair(&F, Record[I+1]); 2575 break; 2576 } 2577 2578 case CXX_BASE_SPECIFIER_OFFSETS: { 2579 if (F.LocalNumCXXBaseSpecifiers != 0) { 2580 Error("duplicate CXX_BASE_SPECIFIER_OFFSETS record in AST file"); 2581 return Failure; 2582 } 2583 2584 F.LocalNumCXXBaseSpecifiers = Record[0]; 2585 F.CXXBaseSpecifiersOffsets = (const uint32_t *)BlobStart; 2586 NumCXXBaseSpecifiersLoaded += F.LocalNumCXXBaseSpecifiers; 2587 break; 2588 } 2589 2590 case DIAG_PRAGMA_MAPPINGS: 2591 if (Record.size() % 2 != 0) { 2592 Error("invalid DIAG_USER_MAPPINGS block in AST file"); 2593 return Failure; 2594 } 2595 2596 if (F.PragmaDiagMappings.empty()) 2597 F.PragmaDiagMappings.swap(Record); 2598 else 2599 F.PragmaDiagMappings.insert(F.PragmaDiagMappings.end(), 2600 Record.begin(), Record.end()); 2601 break; 2602 2603 case CUDA_SPECIAL_DECL_REFS: 2604 // Later tables overwrite earlier ones. 2605 // FIXME: Modules will have trouble with this. 2606 CUDASpecialDeclRefs.clear(); 2607 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2608 CUDASpecialDeclRefs.push_back(getGlobalDeclID(F, Record[I])); 2609 break; 2610 2611 case HEADER_SEARCH_TABLE: { 2612 F.HeaderFileInfoTableData = BlobStart; 2613 F.LocalNumHeaderFileInfos = Record[1]; 2614 F.HeaderFileFrameworkStrings = BlobStart + Record[2]; 2615 if (Record[0]) { 2616 F.HeaderFileInfoTable 2617 = HeaderFileInfoLookupTable::Create( 2618 (const unsigned char *)F.HeaderFileInfoTableData + Record[0], 2619 (const unsigned char *)F.HeaderFileInfoTableData, 2620 HeaderFileInfoTrait(*this, F, 2621 PP? &PP->getHeaderSearchInfo() : 0, 2622 BlobStart + Record[2])); 2623 if (PP) 2624 PP->getHeaderSearchInfo().SetExternalSource(this); 2625 } 2626 break; 2627 } 2628 2629 case FP_PRAGMA_OPTIONS: 2630 // Later tables overwrite earlier ones. 2631 FPPragmaOptions.swap(Record); 2632 break; 2633 2634 case OPENCL_EXTENSIONS: 2635 // Later tables overwrite earlier ones. 2636 OpenCLExtensions.swap(Record); 2637 break; 2638 2639 case TENTATIVE_DEFINITIONS: 2640 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2641 TentativeDefinitions.push_back(getGlobalDeclID(F, Record[I])); 2642 break; 2643 2644 case KNOWN_NAMESPACES: 2645 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2646 KnownNamespaces.push_back(getGlobalDeclID(F, Record[I])); 2647 break; 2648 } 2649 First = false; 2650 } 2651 Error("premature end of bitstream in AST file"); 2652 return Failure; 2653} 2654 2655ASTReader::ASTReadResult ASTReader::validateFileEntries() { 2656 for (ModuleIterator I = ModuleMgr.begin(), 2657 E = ModuleMgr.end(); I != E; ++I) { 2658 Module *F = *I; 2659 llvm::BitstreamCursor &SLocEntryCursor = F->SLocEntryCursor; 2660 2661 for (unsigned i = 0, e = F->LocalNumSLocFileEntries; i != e; ++i) { 2662 SLocEntryCursor.JumpToBit(F->SLocFileOffsets[i]); 2663 unsigned Code = SLocEntryCursor.ReadCode(); 2664 if (Code == llvm::bitc::END_BLOCK || 2665 Code == llvm::bitc::ENTER_SUBBLOCK || 2666 Code == llvm::bitc::DEFINE_ABBREV) { 2667 Error("incorrectly-formatted source location entry in AST file"); 2668 return Failure; 2669 } 2670 2671 RecordData Record; 2672 const char *BlobStart; 2673 unsigned BlobLen; 2674 switch (SLocEntryCursor.ReadRecord(Code, Record, &BlobStart, &BlobLen)) { 2675 default: 2676 Error("incorrectly-formatted source location entry in AST file"); 2677 return Failure; 2678 2679 case SM_SLOC_FILE_ENTRY: { 2680 StringRef Filename(BlobStart, BlobLen); 2681 const FileEntry *File = getFileEntry(Filename); 2682 2683 if (File == 0) { 2684 std::string ErrorStr = "could not find file '"; 2685 ErrorStr += Filename; 2686 ErrorStr += "' referenced by AST file"; 2687 Error(ErrorStr.c_str()); 2688 return IgnorePCH; 2689 } 2690 2691 if (Record.size() < 6) { 2692 Error("source location entry is incorrect"); 2693 return Failure; 2694 } 2695 2696 // The stat info from the FileEntry came from the cached stat 2697 // info of the PCH, so we cannot trust it. 2698 struct stat StatBuf; 2699 if (::stat(File->getName(), &StatBuf) != 0) { 2700 StatBuf.st_size = File->getSize(); 2701 StatBuf.st_mtime = File->getModificationTime(); 2702 } 2703 2704 if (((off_t)Record[4] != StatBuf.st_size 2705#if !defined(LLVM_ON_WIN32) 2706 // In our regression testing, the Windows file system seems to 2707 // have inconsistent modification times that sometimes 2708 // erroneously trigger this error-handling path. 2709 || (time_t)Record[5] != StatBuf.st_mtime 2710#endif 2711 )) { 2712 Error(diag::err_fe_pch_file_modified, Filename); 2713 return IgnorePCH; 2714 } 2715 2716 break; 2717 } 2718 } 2719 } 2720 } 2721 2722 return Success; 2723} 2724 2725ASTReader::ASTReadResult ASTReader::ReadAST(const std::string &FileName, 2726 ModuleKind Type) { 2727 switch(ReadASTCore(FileName, Type)) { 2728 case Failure: return Failure; 2729 case IgnorePCH: return IgnorePCH; 2730 case Success: break; 2731 } 2732 2733 // Here comes stuff that we only do once the entire chain is loaded. 2734 2735 if (!DisableValidation) { 2736 switch(validateFileEntries()) { 2737 case Failure: return Failure; 2738 case IgnorePCH: return IgnorePCH; 2739 case Success: break; 2740 } 2741 } 2742 2743 // Preload SLocEntries. 2744 for (unsigned I = 0, N = PreloadSLocEntries.size(); I != N; ++I) { 2745 ASTReadResult Result = ReadSLocEntryRecord(PreloadSLocEntries[I]); 2746 if (Result != Success) 2747 return Failure; 2748 } 2749 PreloadSLocEntries.clear(); 2750 2751 // Check the predefines buffers. 2752 if (!DisableValidation && Type != MK_Module && CheckPredefinesBuffers()) 2753 return IgnorePCH; 2754 2755 if (PP) { 2756 // Initialization of keywords and pragmas occurs before the 2757 // AST file is read, so there may be some identifiers that were 2758 // loaded into the IdentifierTable before we intercepted the 2759 // creation of identifiers. Iterate through the list of known 2760 // identifiers and determine whether we have to establish 2761 // preprocessor definitions or top-level identifier declaration 2762 // chains for those identifiers. 2763 // 2764 // We copy the IdentifierInfo pointers to a small vector first, 2765 // since de-serializing declarations or macro definitions can add 2766 // new entries into the identifier table, invalidating the 2767 // iterators. 2768 // 2769 // FIXME: We need a lazier way to load this information, e.g., by marking 2770 // the identifier data as 'dirty', so that it will be looked up in the 2771 // AST file(s) if it is uttered in the source. This could save us some 2772 // module load time. 2773 SmallVector<IdentifierInfo *, 128> Identifiers; 2774 for (IdentifierTable::iterator Id = PP->getIdentifierTable().begin(), 2775 IdEnd = PP->getIdentifierTable().end(); 2776 Id != IdEnd; ++Id) 2777 Identifiers.push_back(Id->second); 2778 // We need to search the tables in all files. 2779 for (ModuleIterator J = ModuleMgr.begin(), 2780 M = ModuleMgr.end(); J != M; ++J) { 2781 ASTIdentifierLookupTable *IdTable 2782 = (ASTIdentifierLookupTable *)(*J)->IdentifierLookupTable; 2783 // Not all AST files necessarily have identifier tables, only the useful 2784 // ones. 2785 if (!IdTable) 2786 continue; 2787 for (unsigned I = 0, N = Identifiers.size(); I != N; ++I) { 2788 IdentifierInfo *II = Identifiers[I]; 2789 // Look in the on-disk hash tables for an entry for this identifier 2790 ASTIdentifierLookupTrait Info(*this, *(*J), II); 2791 std::pair<const char*,unsigned> Key(II->getNameStart(),II->getLength()); 2792 ASTIdentifierLookupTable::iterator Pos = IdTable->find(Key, &Info); 2793 if (Pos == IdTable->end()) 2794 continue; 2795 2796 // Dereferencing the iterator has the effect of populating the 2797 // IdentifierInfo node with the various declarations it needs. 2798 (void)*Pos; 2799 } 2800 } 2801 } 2802 2803 if (Context) 2804 InitializeContext(*Context); 2805 2806 if (DeserializationListener) 2807 DeserializationListener->ReaderInitialized(this); 2808 2809 // If this AST file is a precompiled preamble, then set the main file ID of 2810 // the source manager to the file source file from which the preamble was 2811 // built. This is the only valid way to use a precompiled preamble. 2812 if (Type == MK_Preamble) { 2813 if (OriginalFileID.isInvalid()) { 2814 SourceLocation Loc 2815 = SourceMgr.getLocation(FileMgr.getFile(getOriginalSourceFile()), 1, 1); 2816 if (Loc.isValid()) 2817 OriginalFileID = SourceMgr.getDecomposedLoc(Loc).first; 2818 } 2819 else { 2820 OriginalFileID = FileID::get(ModuleMgr.getPrimaryModule().SLocEntryBaseID 2821 + OriginalFileID.getOpaqueValue() - 1); 2822 } 2823 2824 if (!OriginalFileID.isInvalid()) 2825 SourceMgr.SetPreambleFileID(OriginalFileID); 2826 } 2827 2828 return Success; 2829} 2830 2831ASTReader::ASTReadResult ASTReader::ReadASTCore(StringRef FileName, 2832 ModuleKind Type) { 2833 Module &F = ModuleMgr.addModule(FileName, Type); 2834 2835 if (FileName != "-") { 2836 CurrentDir = llvm::sys::path::parent_path(FileName); 2837 if (CurrentDir.empty()) CurrentDir = "."; 2838 } 2839 2840 if (llvm::MemoryBuffer *Buffer = ModuleMgr.lookupBuffer(FileName)) { 2841 F.Buffer.reset(Buffer); 2842 assert(F.Buffer && "Passed null buffer"); 2843 } else { 2844 // Open the AST file. 2845 // 2846 // FIXME: This shouldn't be here, we should just take a raw_ostream. 2847 std::string ErrStr; 2848 llvm::error_code ec; 2849 if (FileName == "-") { 2850 ec = llvm::MemoryBuffer::getSTDIN(F.Buffer); 2851 if (ec) 2852 ErrStr = ec.message(); 2853 } else 2854 F.Buffer.reset(FileMgr.getBufferForFile(FileName, &ErrStr)); 2855 if (!F.Buffer) { 2856 Error(ErrStr.c_str()); 2857 return IgnorePCH; 2858 } 2859 } 2860 2861 // Initialize the stream 2862 F.StreamFile.init((const unsigned char *)F.Buffer->getBufferStart(), 2863 (const unsigned char *)F.Buffer->getBufferEnd()); 2864 llvm::BitstreamCursor &Stream = F.Stream; 2865 Stream.init(F.StreamFile); 2866 F.SizeInBits = F.Buffer->getBufferSize() * 8; 2867 2868 // Sniff for the signature. 2869 if (Stream.Read(8) != 'C' || 2870 Stream.Read(8) != 'P' || 2871 Stream.Read(8) != 'C' || 2872 Stream.Read(8) != 'H') { 2873 Diag(diag::err_not_a_pch_file) << FileName; 2874 return Failure; 2875 } 2876 2877 while (!Stream.AtEndOfStream()) { 2878 unsigned Code = Stream.ReadCode(); 2879 2880 if (Code != llvm::bitc::ENTER_SUBBLOCK) { 2881 Error("invalid record at top-level of AST file"); 2882 return Failure; 2883 } 2884 2885 unsigned BlockID = Stream.ReadSubBlockID(); 2886 2887 // We only know the AST subblock ID. 2888 switch (BlockID) { 2889 case llvm::bitc::BLOCKINFO_BLOCK_ID: 2890 if (Stream.ReadBlockInfoBlock()) { 2891 Error("malformed BlockInfoBlock in AST file"); 2892 return Failure; 2893 } 2894 break; 2895 case AST_BLOCK_ID: 2896 switch (ReadASTBlock(F)) { 2897 case Success: 2898 break; 2899 2900 case Failure: 2901 return Failure; 2902 2903 case IgnorePCH: 2904 // FIXME: We could consider reading through to the end of this 2905 // AST block, skipping subblocks, to see if there are other 2906 // AST blocks elsewhere. 2907 2908 // FIXME: We can't clear loaded slocentries anymore. 2909 //SourceMgr.ClearPreallocatedSLocEntries(); 2910 2911 // Remove the stat cache. 2912 if (F.StatCache) 2913 FileMgr.removeStatCache((ASTStatCache*)F.StatCache); 2914 2915 return IgnorePCH; 2916 } 2917 break; 2918 default: 2919 if (Stream.SkipBlock()) { 2920 Error("malformed block record in AST file"); 2921 return Failure; 2922 } 2923 break; 2924 } 2925 } 2926 2927 // Once read, set the Module bit base offset and update the size in 2928 // bits of all files we've seen. 2929 F.GlobalBitOffset = TotalModulesSizeInBits; 2930 TotalModulesSizeInBits += F.SizeInBits; 2931 GlobalBitOffsetsMap.insert(std::make_pair(F.GlobalBitOffset, &F)); 2932 return Success; 2933} 2934 2935void ASTReader::setPreprocessor(Preprocessor &pp) { 2936 PP = &pp; 2937 2938 if (unsigned N = getTotalNumPreprocessedEntities()) { 2939 if (!PP->getPreprocessingRecord()) 2940 PP->createPreprocessingRecord(true); 2941 PP->getPreprocessingRecord()->SetExternalSource(*this); 2942 PP->getPreprocessingRecord()->allocateLoadedEntities(N); 2943 } 2944 2945 PP->getHeaderSearchInfo().SetExternalLookup(this); 2946 PP->getHeaderSearchInfo().SetExternalSource(this); 2947} 2948 2949void ASTReader::InitializeContext(ASTContext &Ctx) { 2950 Context = &Ctx; 2951 assert(Context && "Passed null context!"); 2952 2953 assert(PP && "Forgot to set Preprocessor ?"); 2954 PP->getIdentifierTable().setExternalIdentifierLookup(this); 2955 PP->setExternalSource(this); 2956 2957 // If we have an update block for the TU waiting, we have to add it before 2958 // deserializing the decl. 2959 TranslationUnitDecl *TU = Ctx.getTranslationUnitDecl(); 2960 DeclContextOffsetsMap::iterator DCU = DeclContextOffsets.find(0); 2961 if (DCU != DeclContextOffsets.end()) { 2962 // Insertion could invalidate map, so grab vector. 2963 DeclContextInfos T; 2964 T.swap(DCU->second); 2965 DeclContextOffsets.erase(DCU); 2966 DeclContextOffsets[TU].swap(T); 2967 } 2968 2969 // If there's a listener, notify them that we "read" the translation unit. 2970 if (DeserializationListener) 2971 DeserializationListener->DeclRead(PREDEF_DECL_TRANSLATION_UNIT_ID, TU); 2972 2973 // Make sure we load the declaration update records for the translation unit, 2974 // if there are any. 2975 loadDeclUpdateRecords(PREDEF_DECL_TRANSLATION_UNIT_ID, TU); 2976 2977 // Note that the translation unit has external lexical and visible storage. 2978 TU->setHasExternalLexicalStorage(true); 2979 TU->setHasExternalVisibleStorage(true); 2980 2981 // FIXME: Find a better way to deal with collisions between these 2982 // built-in types. Right now, we just ignore the problem. 2983 2984 // Load the special types. 2985 if (Context->getBuiltinVaListType().isNull()) { 2986 Context->setBuiltinVaListType( 2987 GetType(SpecialTypes[SPECIAL_TYPE_BUILTIN_VA_LIST])); 2988 } 2989 2990 if (unsigned Proto = SpecialTypes[SPECIAL_TYPE_OBJC_PROTOCOL]) { 2991 if (Context->ObjCProtoType.isNull()) 2992 Context->ObjCProtoType = GetType(Proto); 2993 } 2994 2995 if (unsigned String = SpecialTypes[SPECIAL_TYPE_CF_CONSTANT_STRING]) { 2996 if (!Context->CFConstantStringTypeDecl) 2997 Context->setCFConstantStringType(GetType(String)); 2998 } 2999 3000 if (unsigned File = SpecialTypes[SPECIAL_TYPE_FILE]) { 3001 QualType FileType = GetType(File); 3002 if (FileType.isNull()) { 3003 Error("FILE type is NULL"); 3004 return; 3005 } 3006 3007 if (!Context->FILEDecl) { 3008 if (const TypedefType *Typedef = FileType->getAs<TypedefType>()) 3009 Context->setFILEDecl(Typedef->getDecl()); 3010 else { 3011 const TagType *Tag = FileType->getAs<TagType>(); 3012 if (!Tag) { 3013 Error("Invalid FILE type in AST file"); 3014 return; 3015 } 3016 Context->setFILEDecl(Tag->getDecl()); 3017 } 3018 } 3019 } 3020 3021 if (unsigned Jmp_buf = SpecialTypes[SPECIAL_TYPE_jmp_buf]) { 3022 QualType Jmp_bufType = GetType(Jmp_buf); 3023 if (Jmp_bufType.isNull()) { 3024 Error("jmp_buf type is NULL"); 3025 return; 3026 } 3027 3028 if (!Context->jmp_bufDecl) { 3029 if (const TypedefType *Typedef = Jmp_bufType->getAs<TypedefType>()) 3030 Context->setjmp_bufDecl(Typedef->getDecl()); 3031 else { 3032 const TagType *Tag = Jmp_bufType->getAs<TagType>(); 3033 if (!Tag) { 3034 Error("Invalid jmp_buf type in AST file"); 3035 return; 3036 } 3037 Context->setjmp_bufDecl(Tag->getDecl()); 3038 } 3039 } 3040 } 3041 3042 if (unsigned Sigjmp_buf = SpecialTypes[SPECIAL_TYPE_sigjmp_buf]) { 3043 QualType Sigjmp_bufType = GetType(Sigjmp_buf); 3044 if (Sigjmp_bufType.isNull()) { 3045 Error("sigjmp_buf type is NULL"); 3046 return; 3047 } 3048 3049 if (!Context->sigjmp_bufDecl) { 3050 if (const TypedefType *Typedef = Sigjmp_bufType->getAs<TypedefType>()) 3051 Context->setsigjmp_bufDecl(Typedef->getDecl()); 3052 else { 3053 const TagType *Tag = Sigjmp_bufType->getAs<TagType>(); 3054 assert(Tag && "Invalid sigjmp_buf type in AST file"); 3055 Context->setsigjmp_bufDecl(Tag->getDecl()); 3056 } 3057 } 3058 } 3059 3060 if (unsigned ObjCIdRedef 3061 = SpecialTypes[SPECIAL_TYPE_OBJC_ID_REDEFINITION]) { 3062 if (Context->ObjCIdRedefinitionType.isNull()) 3063 Context->ObjCIdRedefinitionType = GetType(ObjCIdRedef); 3064 } 3065 3066 if (unsigned ObjCClassRedef 3067 = SpecialTypes[SPECIAL_TYPE_OBJC_CLASS_REDEFINITION]) { 3068 if (Context->ObjCClassRedefinitionType.isNull()) 3069 Context->ObjCClassRedefinitionType = GetType(ObjCClassRedef); 3070 } 3071 3072 if (unsigned ObjCSelRedef 3073 = SpecialTypes[SPECIAL_TYPE_OBJC_SEL_REDEFINITION]) { 3074 if (Context->ObjCSelRedefinitionType.isNull()) 3075 Context->ObjCSelRedefinitionType = GetType(ObjCSelRedef); 3076 } 3077 3078 ReadPragmaDiagnosticMappings(Context->getDiagnostics()); 3079 3080 // If there were any CUDA special declarations, deserialize them. 3081 if (!CUDASpecialDeclRefs.empty()) { 3082 assert(CUDASpecialDeclRefs.size() == 1 && "More decl refs than expected!"); 3083 Context->setcudaConfigureCallDecl( 3084 cast<FunctionDecl>(GetDecl(CUDASpecialDeclRefs[0]))); 3085 } 3086} 3087 3088/// \brief Retrieve the name of the original source file name 3089/// directly from the AST file, without actually loading the AST 3090/// file. 3091std::string ASTReader::getOriginalSourceFile(const std::string &ASTFileName, 3092 FileManager &FileMgr, 3093 Diagnostic &Diags) { 3094 // Open the AST file. 3095 std::string ErrStr; 3096 llvm::OwningPtr<llvm::MemoryBuffer> Buffer; 3097 Buffer.reset(FileMgr.getBufferForFile(ASTFileName, &ErrStr)); 3098 if (!Buffer) { 3099 Diags.Report(diag::err_fe_unable_to_read_pch_file) << ErrStr; 3100 return std::string(); 3101 } 3102 3103 // Initialize the stream 3104 llvm::BitstreamReader StreamFile; 3105 llvm::BitstreamCursor Stream; 3106 StreamFile.init((const unsigned char *)Buffer->getBufferStart(), 3107 (const unsigned char *)Buffer->getBufferEnd()); 3108 Stream.init(StreamFile); 3109 3110 // Sniff for the signature. 3111 if (Stream.Read(8) != 'C' || 3112 Stream.Read(8) != 'P' || 3113 Stream.Read(8) != 'C' || 3114 Stream.Read(8) != 'H') { 3115 Diags.Report(diag::err_fe_not_a_pch_file) << ASTFileName; 3116 return std::string(); 3117 } 3118 3119 RecordData Record; 3120 while (!Stream.AtEndOfStream()) { 3121 unsigned Code = Stream.ReadCode(); 3122 3123 if (Code == llvm::bitc::ENTER_SUBBLOCK) { 3124 unsigned BlockID = Stream.ReadSubBlockID(); 3125 3126 // We only know the AST subblock ID. 3127 switch (BlockID) { 3128 case AST_BLOCK_ID: 3129 if (Stream.EnterSubBlock(AST_BLOCK_ID)) { 3130 Diags.Report(diag::err_fe_pch_malformed_block) << ASTFileName; 3131 return std::string(); 3132 } 3133 break; 3134 3135 default: 3136 if (Stream.SkipBlock()) { 3137 Diags.Report(diag::err_fe_pch_malformed_block) << ASTFileName; 3138 return std::string(); 3139 } 3140 break; 3141 } 3142 continue; 3143 } 3144 3145 if (Code == llvm::bitc::END_BLOCK) { 3146 if (Stream.ReadBlockEnd()) { 3147 Diags.Report(diag::err_fe_pch_error_at_end_block) << ASTFileName; 3148 return std::string(); 3149 } 3150 continue; 3151 } 3152 3153 if (Code == llvm::bitc::DEFINE_ABBREV) { 3154 Stream.ReadAbbrevRecord(); 3155 continue; 3156 } 3157 3158 Record.clear(); 3159 const char *BlobStart = 0; 3160 unsigned BlobLen = 0; 3161 if (Stream.ReadRecord(Code, Record, &BlobStart, &BlobLen) 3162 == ORIGINAL_FILE_NAME) 3163 return std::string(BlobStart, BlobLen); 3164 } 3165 3166 return std::string(); 3167} 3168 3169/// \brief Parse the record that corresponds to a LangOptions data 3170/// structure. 3171/// 3172/// This routine parses the language options from the AST file and then gives 3173/// them to the AST listener if one is set. 3174/// 3175/// \returns true if the listener deems the file unacceptable, false otherwise. 3176bool ASTReader::ParseLanguageOptions( 3177 const SmallVectorImpl<uint64_t> &Record) { 3178 if (Listener) { 3179 LangOptions LangOpts; 3180 3181 #define PARSE_LANGOPT(Option) \ 3182 LangOpts.Option = Record[Idx]; \ 3183 ++Idx 3184 3185 unsigned Idx = 0; 3186 PARSE_LANGOPT(Trigraphs); 3187 PARSE_LANGOPT(BCPLComment); 3188 PARSE_LANGOPT(DollarIdents); 3189 PARSE_LANGOPT(AsmPreprocessor); 3190 PARSE_LANGOPT(GNUMode); 3191 PARSE_LANGOPT(GNUKeywords); 3192 PARSE_LANGOPT(ImplicitInt); 3193 PARSE_LANGOPT(Digraphs); 3194 PARSE_LANGOPT(HexFloats); 3195 PARSE_LANGOPT(C99); 3196 PARSE_LANGOPT(C1X); 3197 PARSE_LANGOPT(Microsoft); 3198 PARSE_LANGOPT(CPlusPlus); 3199 PARSE_LANGOPT(CPlusPlus0x); 3200 PARSE_LANGOPT(CXXOperatorNames); 3201 PARSE_LANGOPT(ObjC1); 3202 PARSE_LANGOPT(ObjC2); 3203 PARSE_LANGOPT(ObjCNonFragileABI); 3204 PARSE_LANGOPT(ObjCNonFragileABI2); 3205 PARSE_LANGOPT(AppleKext); 3206 PARSE_LANGOPT(ObjCDefaultSynthProperties); 3207 PARSE_LANGOPT(ObjCInferRelatedResultType); 3208 PARSE_LANGOPT(NoConstantCFStrings); 3209 PARSE_LANGOPT(PascalStrings); 3210 PARSE_LANGOPT(WritableStrings); 3211 PARSE_LANGOPT(LaxVectorConversions); 3212 PARSE_LANGOPT(AltiVec); 3213 PARSE_LANGOPT(Exceptions); 3214 PARSE_LANGOPT(ObjCExceptions); 3215 PARSE_LANGOPT(CXXExceptions); 3216 PARSE_LANGOPT(SjLjExceptions); 3217 PARSE_LANGOPT(MSBitfields); 3218 PARSE_LANGOPT(NeXTRuntime); 3219 PARSE_LANGOPT(Freestanding); 3220 PARSE_LANGOPT(NoBuiltin); 3221 PARSE_LANGOPT(ThreadsafeStatics); 3222 PARSE_LANGOPT(POSIXThreads); 3223 PARSE_LANGOPT(Blocks); 3224 PARSE_LANGOPT(EmitAllDecls); 3225 PARSE_LANGOPT(MathErrno); 3226 LangOpts.setSignedOverflowBehavior((LangOptions::SignedOverflowBehaviorTy) 3227 Record[Idx++]); 3228 PARSE_LANGOPT(HeinousExtensions); 3229 PARSE_LANGOPT(Optimize); 3230 PARSE_LANGOPT(OptimizeSize); 3231 PARSE_LANGOPT(Static); 3232 PARSE_LANGOPT(PICLevel); 3233 PARSE_LANGOPT(GNUInline); 3234 PARSE_LANGOPT(NoInline); 3235 PARSE_LANGOPT(Deprecated); 3236 PARSE_LANGOPT(AccessControl); 3237 PARSE_LANGOPT(CharIsSigned); 3238 PARSE_LANGOPT(ShortWChar); 3239 PARSE_LANGOPT(ShortEnums); 3240 LangOpts.setGCMode((LangOptions::GCMode)Record[Idx++]); 3241 LangOpts.setVisibilityMode((Visibility)Record[Idx++]); 3242 LangOpts.setStackProtectorMode((LangOptions::StackProtectorMode) 3243 Record[Idx++]); 3244 PARSE_LANGOPT(InstantiationDepth); 3245 PARSE_LANGOPT(OpenCL); 3246 PARSE_LANGOPT(CUDA); 3247 PARSE_LANGOPT(CatchUndefined); 3248 PARSE_LANGOPT(DefaultFPContract); 3249 PARSE_LANGOPT(ElideConstructors); 3250 PARSE_LANGOPT(SpellChecking); 3251 PARSE_LANGOPT(MRTD); 3252 PARSE_LANGOPT(ObjCAutoRefCount); 3253 PARSE_LANGOPT(ObjCInferRelatedReturnType); 3254 #undef PARSE_LANGOPT 3255 3256 return Listener->ReadLanguageOptions(LangOpts); 3257 } 3258 3259 return false; 3260} 3261 3262void ASTReader::ReadPreprocessedEntities() { 3263 for (ModuleIterator I = ModuleMgr.begin(), E = ModuleMgr.end(); I != E; ++I) { 3264 Module &F = *(*I); 3265 if (!F.PreprocessorDetailCursor.getBitStreamReader()) 3266 continue; 3267 3268 SavedStreamPosition SavedPosition(F.PreprocessorDetailCursor); 3269 F.PreprocessorDetailCursor.JumpToBit(F.PreprocessorDetailStartOffset); 3270 while (LoadPreprocessedEntity(F)) { } 3271 } 3272} 3273 3274PreprocessedEntity *ASTReader::ReadPreprocessedEntityAtOffset(uint64_t Offset) { 3275 RecordLocation Loc = getLocalBitOffset(Offset); 3276 3277 // Keep track of where we are in the stream, then jump back there 3278 // after reading this entity. 3279 SavedStreamPosition SavedPosition(Loc.F->PreprocessorDetailCursor); 3280 Loc.F->PreprocessorDetailCursor.JumpToBit(Loc.Offset); 3281 return LoadPreprocessedEntity(*Loc.F); 3282} 3283 3284HeaderFileInfo ASTReader::GetHeaderFileInfo(const FileEntry *FE) { 3285 for (ModuleIterator I = ModuleMgr.begin(), E = ModuleMgr.end(); I != E; ++I) { 3286 Module &F = *(*I); 3287 3288 HeaderFileInfoTrait Trait(*this, F, &PP->getHeaderSearchInfo(), 3289 F.HeaderFileFrameworkStrings, 3290 FE->getName()); 3291 3292 HeaderFileInfoLookupTable *Table 3293 = static_cast<HeaderFileInfoLookupTable *>(F.HeaderFileInfoTable); 3294 if (!Table) 3295 continue; 3296 3297 // Look in the on-disk hash table for an entry for this file name. 3298 HeaderFileInfoLookupTable::iterator Pos = Table->find(FE->getName(), 3299 &Trait); 3300 if (Pos == Table->end()) 3301 continue; 3302 3303 HeaderFileInfo HFI = *Pos; 3304 if (Listener) 3305 Listener->ReadHeaderFileInfo(HFI, FE->getUID()); 3306 3307 return HFI; 3308 } 3309 3310 return HeaderFileInfo(); 3311} 3312 3313void ASTReader::ReadPragmaDiagnosticMappings(Diagnostic &Diag) { 3314 for (ModuleIterator I = ModuleMgr.begin(), E = ModuleMgr.end(); I != E; ++I) { 3315 Module &F = *(*I); 3316 unsigned Idx = 0; 3317 while (Idx < F.PragmaDiagMappings.size()) { 3318 SourceLocation Loc = ReadSourceLocation(F, F.PragmaDiagMappings[Idx++]); 3319 while (1) { 3320 assert(Idx < F.PragmaDiagMappings.size() && 3321 "Invalid data, didn't find '-1' marking end of diag/map pairs"); 3322 if (Idx >= F.PragmaDiagMappings.size()) { 3323 break; // Something is messed up but at least avoid infinite loop in 3324 // release build. 3325 } 3326 unsigned DiagID = F.PragmaDiagMappings[Idx++]; 3327 if (DiagID == (unsigned)-1) { 3328 break; // no more diag/map pairs for this location. 3329 } 3330 diag::Mapping Map = (diag::Mapping)F.PragmaDiagMappings[Idx++]; 3331 Diag.setDiagnosticMapping(DiagID, Map, Loc); 3332 } 3333 } 3334 } 3335} 3336 3337/// \brief Get the correct cursor and offset for loading a type. 3338ASTReader::RecordLocation ASTReader::TypeCursorForIndex(unsigned Index) { 3339 GlobalTypeMapType::iterator I = GlobalTypeMap.find(Index); 3340 assert(I != GlobalTypeMap.end() && "Corrupted global type map"); 3341 Module *M = I->second; 3342 return RecordLocation(M, M->TypeOffsets[Index - M->BaseTypeIndex]); 3343} 3344 3345/// \brief Read and return the type with the given index.. 3346/// 3347/// The index is the type ID, shifted and minus the number of predefs. This 3348/// routine actually reads the record corresponding to the type at the given 3349/// location. It is a helper routine for GetType, which deals with reading type 3350/// IDs. 3351QualType ASTReader::readTypeRecord(unsigned Index) { 3352 RecordLocation Loc = TypeCursorForIndex(Index); 3353 llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor; 3354 3355 // Keep track of where we are in the stream, then jump back there 3356 // after reading this type. 3357 SavedStreamPosition SavedPosition(DeclsCursor); 3358 3359 ReadingKindTracker ReadingKind(Read_Type, *this); 3360 3361 // Note that we are loading a type record. 3362 Deserializing AType(this); 3363 3364 unsigned Idx = 0; 3365 DeclsCursor.JumpToBit(Loc.Offset); 3366 RecordData Record; 3367 unsigned Code = DeclsCursor.ReadCode(); 3368 switch ((TypeCode)DeclsCursor.ReadRecord(Code, Record)) { 3369 case TYPE_EXT_QUAL: { 3370 if (Record.size() != 2) { 3371 Error("Incorrect encoding of extended qualifier type"); 3372 return QualType(); 3373 } 3374 QualType Base = readType(*Loc.F, Record, Idx); 3375 Qualifiers Quals = Qualifiers::fromOpaqueValue(Record[Idx++]); 3376 return Context->getQualifiedType(Base, Quals); 3377 } 3378 3379 case TYPE_COMPLEX: { 3380 if (Record.size() != 1) { 3381 Error("Incorrect encoding of complex type"); 3382 return QualType(); 3383 } 3384 QualType ElemType = readType(*Loc.F, Record, Idx); 3385 return Context->getComplexType(ElemType); 3386 } 3387 3388 case TYPE_POINTER: { 3389 if (Record.size() != 1) { 3390 Error("Incorrect encoding of pointer type"); 3391 return QualType(); 3392 } 3393 QualType PointeeType = readType(*Loc.F, Record, Idx); 3394 return Context->getPointerType(PointeeType); 3395 } 3396 3397 case TYPE_BLOCK_POINTER: { 3398 if (Record.size() != 1) { 3399 Error("Incorrect encoding of block pointer type"); 3400 return QualType(); 3401 } 3402 QualType PointeeType = readType(*Loc.F, Record, Idx); 3403 return Context->getBlockPointerType(PointeeType); 3404 } 3405 3406 case TYPE_LVALUE_REFERENCE: { 3407 if (Record.size() != 2) { 3408 Error("Incorrect encoding of lvalue reference type"); 3409 return QualType(); 3410 } 3411 QualType PointeeType = readType(*Loc.F, Record, Idx); 3412 return Context->getLValueReferenceType(PointeeType, Record[1]); 3413 } 3414 3415 case TYPE_RVALUE_REFERENCE: { 3416 if (Record.size() != 1) { 3417 Error("Incorrect encoding of rvalue reference type"); 3418 return QualType(); 3419 } 3420 QualType PointeeType = readType(*Loc.F, Record, Idx); 3421 return Context->getRValueReferenceType(PointeeType); 3422 } 3423 3424 case TYPE_MEMBER_POINTER: { 3425 if (Record.size() != 2) { 3426 Error("Incorrect encoding of member pointer type"); 3427 return QualType(); 3428 } 3429 QualType PointeeType = readType(*Loc.F, Record, Idx); 3430 QualType ClassType = readType(*Loc.F, Record, Idx); 3431 if (PointeeType.isNull() || ClassType.isNull()) 3432 return QualType(); 3433 3434 return Context->getMemberPointerType(PointeeType, ClassType.getTypePtr()); 3435 } 3436 3437 case TYPE_CONSTANT_ARRAY: { 3438 QualType ElementType = readType(*Loc.F, Record, Idx); 3439 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1]; 3440 unsigned IndexTypeQuals = Record[2]; 3441 unsigned Idx = 3; 3442 llvm::APInt Size = ReadAPInt(Record, Idx); 3443 return Context->getConstantArrayType(ElementType, Size, 3444 ASM, IndexTypeQuals); 3445 } 3446 3447 case TYPE_INCOMPLETE_ARRAY: { 3448 QualType ElementType = readType(*Loc.F, Record, Idx); 3449 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1]; 3450 unsigned IndexTypeQuals = Record[2]; 3451 return Context->getIncompleteArrayType(ElementType, ASM, IndexTypeQuals); 3452 } 3453 3454 case TYPE_VARIABLE_ARRAY: { 3455 QualType ElementType = readType(*Loc.F, Record, Idx); 3456 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1]; 3457 unsigned IndexTypeQuals = Record[2]; 3458 SourceLocation LBLoc = ReadSourceLocation(*Loc.F, Record[3]); 3459 SourceLocation RBLoc = ReadSourceLocation(*Loc.F, Record[4]); 3460 return Context->getVariableArrayType(ElementType, ReadExpr(*Loc.F), 3461 ASM, IndexTypeQuals, 3462 SourceRange(LBLoc, RBLoc)); 3463 } 3464 3465 case TYPE_VECTOR: { 3466 if (Record.size() != 3) { 3467 Error("incorrect encoding of vector type in AST file"); 3468 return QualType(); 3469 } 3470 3471 QualType ElementType = readType(*Loc.F, Record, Idx); 3472 unsigned NumElements = Record[1]; 3473 unsigned VecKind = Record[2]; 3474 return Context->getVectorType(ElementType, NumElements, 3475 (VectorType::VectorKind)VecKind); 3476 } 3477 3478 case TYPE_EXT_VECTOR: { 3479 if (Record.size() != 3) { 3480 Error("incorrect encoding of extended vector type in AST file"); 3481 return QualType(); 3482 } 3483 3484 QualType ElementType = readType(*Loc.F, Record, Idx); 3485 unsigned NumElements = Record[1]; 3486 return Context->getExtVectorType(ElementType, NumElements); 3487 } 3488 3489 case TYPE_FUNCTION_NO_PROTO: { 3490 if (Record.size() != 6) { 3491 Error("incorrect encoding of no-proto function type"); 3492 return QualType(); 3493 } 3494 QualType ResultType = readType(*Loc.F, Record, Idx); 3495 FunctionType::ExtInfo Info(Record[1], Record[2], Record[3], 3496 (CallingConv)Record[4], Record[5]); 3497 return Context->getFunctionNoProtoType(ResultType, Info); 3498 } 3499 3500 case TYPE_FUNCTION_PROTO: { 3501 QualType ResultType = readType(*Loc.F, Record, Idx); 3502 3503 FunctionProtoType::ExtProtoInfo EPI; 3504 EPI.ExtInfo = FunctionType::ExtInfo(/*noreturn*/ Record[1], 3505 /*hasregparm*/ Record[2], 3506 /*regparm*/ Record[3], 3507 static_cast<CallingConv>(Record[4]), 3508 /*produces*/ Record[5]); 3509 3510 unsigned Idx = 6; 3511 unsigned NumParams = Record[Idx++]; 3512 SmallVector<QualType, 16> ParamTypes; 3513 for (unsigned I = 0; I != NumParams; ++I) 3514 ParamTypes.push_back(readType(*Loc.F, Record, Idx)); 3515 3516 EPI.Variadic = Record[Idx++]; 3517 EPI.TypeQuals = Record[Idx++]; 3518 EPI.RefQualifier = static_cast<RefQualifierKind>(Record[Idx++]); 3519 ExceptionSpecificationType EST = 3520 static_cast<ExceptionSpecificationType>(Record[Idx++]); 3521 EPI.ExceptionSpecType = EST; 3522 if (EST == EST_Dynamic) { 3523 EPI.NumExceptions = Record[Idx++]; 3524 SmallVector<QualType, 2> Exceptions; 3525 for (unsigned I = 0; I != EPI.NumExceptions; ++I) 3526 Exceptions.push_back(readType(*Loc.F, Record, Idx)); 3527 EPI.Exceptions = Exceptions.data(); 3528 } else if (EST == EST_ComputedNoexcept) { 3529 EPI.NoexceptExpr = ReadExpr(*Loc.F); 3530 } 3531 return Context->getFunctionType(ResultType, ParamTypes.data(), NumParams, 3532 EPI); 3533 } 3534 3535 case TYPE_UNRESOLVED_USING: { 3536 unsigned Idx = 0; 3537 return Context->getTypeDeclType( 3538 ReadDeclAs<UnresolvedUsingTypenameDecl>(*Loc.F, Record, Idx)); 3539 } 3540 3541 case TYPE_TYPEDEF: { 3542 if (Record.size() != 2) { 3543 Error("incorrect encoding of typedef type"); 3544 return QualType(); 3545 } 3546 unsigned Idx = 0; 3547 TypedefNameDecl *Decl = ReadDeclAs<TypedefNameDecl>(*Loc.F, Record, Idx); 3548 QualType Canonical = readType(*Loc.F, Record, Idx); 3549 if (!Canonical.isNull()) 3550 Canonical = Context->getCanonicalType(Canonical); 3551 return Context->getTypedefType(Decl, Canonical); 3552 } 3553 3554 case TYPE_TYPEOF_EXPR: 3555 return Context->getTypeOfExprType(ReadExpr(*Loc.F)); 3556 3557 case TYPE_TYPEOF: { 3558 if (Record.size() != 1) { 3559 Error("incorrect encoding of typeof(type) in AST file"); 3560 return QualType(); 3561 } 3562 QualType UnderlyingType = readType(*Loc.F, Record, Idx); 3563 return Context->getTypeOfType(UnderlyingType); 3564 } 3565 3566 case TYPE_DECLTYPE: 3567 return Context->getDecltypeType(ReadExpr(*Loc.F)); 3568 3569 case TYPE_UNARY_TRANSFORM: { 3570 QualType BaseType = readType(*Loc.F, Record, Idx); 3571 QualType UnderlyingType = readType(*Loc.F, Record, Idx); 3572 UnaryTransformType::UTTKind UKind = (UnaryTransformType::UTTKind)Record[2]; 3573 return Context->getUnaryTransformType(BaseType, UnderlyingType, UKind); 3574 } 3575 3576 case TYPE_AUTO: 3577 return Context->getAutoType(readType(*Loc.F, Record, Idx)); 3578 3579 case TYPE_RECORD: { 3580 if (Record.size() != 2) { 3581 Error("incorrect encoding of record type"); 3582 return QualType(); 3583 } 3584 unsigned Idx = 0; 3585 bool IsDependent = Record[Idx++]; 3586 QualType T 3587 = Context->getRecordType(ReadDeclAs<RecordDecl>(*Loc.F, Record, Idx)); 3588 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent); 3589 return T; 3590 } 3591 3592 case TYPE_ENUM: { 3593 if (Record.size() != 2) { 3594 Error("incorrect encoding of enum type"); 3595 return QualType(); 3596 } 3597 unsigned Idx = 0; 3598 bool IsDependent = Record[Idx++]; 3599 QualType T 3600 = Context->getEnumType(ReadDeclAs<EnumDecl>(*Loc.F, Record, Idx)); 3601 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent); 3602 return T; 3603 } 3604 3605 case TYPE_ATTRIBUTED: { 3606 if (Record.size() != 3) { 3607 Error("incorrect encoding of attributed type"); 3608 return QualType(); 3609 } 3610 QualType modifiedType = readType(*Loc.F, Record, Idx); 3611 QualType equivalentType = readType(*Loc.F, Record, Idx); 3612 AttributedType::Kind kind = static_cast<AttributedType::Kind>(Record[2]); 3613 return Context->getAttributedType(kind, modifiedType, equivalentType); 3614 } 3615 3616 case TYPE_PAREN: { 3617 if (Record.size() != 1) { 3618 Error("incorrect encoding of paren type"); 3619 return QualType(); 3620 } 3621 QualType InnerType = readType(*Loc.F, Record, Idx); 3622 return Context->getParenType(InnerType); 3623 } 3624 3625 case TYPE_PACK_EXPANSION: { 3626 if (Record.size() != 2) { 3627 Error("incorrect encoding of pack expansion type"); 3628 return QualType(); 3629 } 3630 QualType Pattern = readType(*Loc.F, Record, Idx); 3631 if (Pattern.isNull()) 3632 return QualType(); 3633 llvm::Optional<unsigned> NumExpansions; 3634 if (Record[1]) 3635 NumExpansions = Record[1] - 1; 3636 return Context->getPackExpansionType(Pattern, NumExpansions); 3637 } 3638 3639 case TYPE_ELABORATED: { 3640 unsigned Idx = 0; 3641 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++]; 3642 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(*Loc.F, Record, Idx); 3643 QualType NamedType = readType(*Loc.F, Record, Idx); 3644 return Context->getElaboratedType(Keyword, NNS, NamedType); 3645 } 3646 3647 case TYPE_OBJC_INTERFACE: { 3648 unsigned Idx = 0; 3649 ObjCInterfaceDecl *ItfD 3650 = ReadDeclAs<ObjCInterfaceDecl>(*Loc.F, Record, Idx); 3651 return Context->getObjCInterfaceType(ItfD); 3652 } 3653 3654 case TYPE_OBJC_OBJECT: { 3655 unsigned Idx = 0; 3656 QualType Base = readType(*Loc.F, Record, Idx); 3657 unsigned NumProtos = Record[Idx++]; 3658 SmallVector<ObjCProtocolDecl*, 4> Protos; 3659 for (unsigned I = 0; I != NumProtos; ++I) 3660 Protos.push_back(ReadDeclAs<ObjCProtocolDecl>(*Loc.F, Record, Idx)); 3661 return Context->getObjCObjectType(Base, Protos.data(), NumProtos); 3662 } 3663 3664 case TYPE_OBJC_OBJECT_POINTER: { 3665 unsigned Idx = 0; 3666 QualType Pointee = readType(*Loc.F, Record, Idx); 3667 return Context->getObjCObjectPointerType(Pointee); 3668 } 3669 3670 case TYPE_SUBST_TEMPLATE_TYPE_PARM: { 3671 unsigned Idx = 0; 3672 QualType Parm = readType(*Loc.F, Record, Idx); 3673 QualType Replacement = readType(*Loc.F, Record, Idx); 3674 return 3675 Context->getSubstTemplateTypeParmType(cast<TemplateTypeParmType>(Parm), 3676 Replacement); 3677 } 3678 3679 case TYPE_SUBST_TEMPLATE_TYPE_PARM_PACK: { 3680 unsigned Idx = 0; 3681 QualType Parm = readType(*Loc.F, Record, Idx); 3682 TemplateArgument ArgPack = ReadTemplateArgument(*Loc.F, Record, Idx); 3683 return Context->getSubstTemplateTypeParmPackType( 3684 cast<TemplateTypeParmType>(Parm), 3685 ArgPack); 3686 } 3687 3688 case TYPE_INJECTED_CLASS_NAME: { 3689 CXXRecordDecl *D = ReadDeclAs<CXXRecordDecl>(*Loc.F, Record, Idx); 3690 QualType TST = readType(*Loc.F, Record, Idx); // probably derivable 3691 // FIXME: ASTContext::getInjectedClassNameType is not currently suitable 3692 // for AST reading, too much interdependencies. 3693 return 3694 QualType(new (*Context, TypeAlignment) InjectedClassNameType(D, TST), 0); 3695 } 3696 3697 case TYPE_TEMPLATE_TYPE_PARM: { 3698 unsigned Idx = 0; 3699 unsigned Depth = Record[Idx++]; 3700 unsigned Index = Record[Idx++]; 3701 bool Pack = Record[Idx++]; 3702 TemplateTypeParmDecl *D 3703 = ReadDeclAs<TemplateTypeParmDecl>(*Loc.F, Record, Idx); 3704 return Context->getTemplateTypeParmType(Depth, Index, Pack, D); 3705 } 3706 3707 case TYPE_DEPENDENT_NAME: { 3708 unsigned Idx = 0; 3709 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++]; 3710 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(*Loc.F, Record, Idx); 3711 const IdentifierInfo *Name = this->GetIdentifierInfo(*Loc.F, Record, Idx); 3712 QualType Canon = readType(*Loc.F, Record, Idx); 3713 if (!Canon.isNull()) 3714 Canon = Context->getCanonicalType(Canon); 3715 return Context->getDependentNameType(Keyword, NNS, Name, Canon); 3716 } 3717 3718 case TYPE_DEPENDENT_TEMPLATE_SPECIALIZATION: { 3719 unsigned Idx = 0; 3720 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++]; 3721 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(*Loc.F, Record, Idx); 3722 const IdentifierInfo *Name = this->GetIdentifierInfo(*Loc.F, Record, Idx); 3723 unsigned NumArgs = Record[Idx++]; 3724 SmallVector<TemplateArgument, 8> Args; 3725 Args.reserve(NumArgs); 3726 while (NumArgs--) 3727 Args.push_back(ReadTemplateArgument(*Loc.F, Record, Idx)); 3728 return Context->getDependentTemplateSpecializationType(Keyword, NNS, Name, 3729 Args.size(), Args.data()); 3730 } 3731 3732 case TYPE_DEPENDENT_SIZED_ARRAY: { 3733 unsigned Idx = 0; 3734 3735 // ArrayType 3736 QualType ElementType = readType(*Loc.F, Record, Idx); 3737 ArrayType::ArraySizeModifier ASM 3738 = (ArrayType::ArraySizeModifier)Record[Idx++]; 3739 unsigned IndexTypeQuals = Record[Idx++]; 3740 3741 // DependentSizedArrayType 3742 Expr *NumElts = ReadExpr(*Loc.F); 3743 SourceRange Brackets = ReadSourceRange(*Loc.F, Record, Idx); 3744 3745 return Context->getDependentSizedArrayType(ElementType, NumElts, ASM, 3746 IndexTypeQuals, Brackets); 3747 } 3748 3749 case TYPE_TEMPLATE_SPECIALIZATION: { 3750 unsigned Idx = 0; 3751 bool IsDependent = Record[Idx++]; 3752 TemplateName Name = ReadTemplateName(*Loc.F, Record, Idx); 3753 SmallVector<TemplateArgument, 8> Args; 3754 ReadTemplateArgumentList(Args, *Loc.F, Record, Idx); 3755 QualType Underlying = readType(*Loc.F, Record, Idx); 3756 QualType T; 3757 if (Underlying.isNull()) 3758 T = Context->getCanonicalTemplateSpecializationType(Name, Args.data(), 3759 Args.size()); 3760 else 3761 T = Context->getTemplateSpecializationType(Name, Args.data(), 3762 Args.size(), Underlying); 3763 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent); 3764 return T; 3765 } 3766 } 3767 // Suppress a GCC warning 3768 return QualType(); 3769} 3770 3771class clang::TypeLocReader : public TypeLocVisitor<TypeLocReader> { 3772 ASTReader &Reader; 3773 Module &F; 3774 llvm::BitstreamCursor &DeclsCursor; 3775 const ASTReader::RecordData &Record; 3776 unsigned &Idx; 3777 3778 SourceLocation ReadSourceLocation(const ASTReader::RecordData &R, 3779 unsigned &I) { 3780 return Reader.ReadSourceLocation(F, R, I); 3781 } 3782 3783 template<typename T> 3784 T *ReadDeclAs(const ASTReader::RecordData &Record, unsigned &Idx) { 3785 return Reader.ReadDeclAs<T>(F, Record, Idx); 3786 } 3787 3788public: 3789 TypeLocReader(ASTReader &Reader, Module &F, 3790 const ASTReader::RecordData &Record, unsigned &Idx) 3791 : Reader(Reader), F(F), DeclsCursor(F.DeclsCursor), Record(Record), Idx(Idx) 3792 { } 3793 3794 // We want compile-time assurance that we've enumerated all of 3795 // these, so unfortunately we have to declare them first, then 3796 // define them out-of-line. 3797#define ABSTRACT_TYPELOC(CLASS, PARENT) 3798#define TYPELOC(CLASS, PARENT) \ 3799 void Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc); 3800#include "clang/AST/TypeLocNodes.def" 3801 3802 void VisitFunctionTypeLoc(FunctionTypeLoc); 3803 void VisitArrayTypeLoc(ArrayTypeLoc); 3804}; 3805 3806void TypeLocReader::VisitQualifiedTypeLoc(QualifiedTypeLoc TL) { 3807 // nothing to do 3808} 3809void TypeLocReader::VisitBuiltinTypeLoc(BuiltinTypeLoc TL) { 3810 TL.setBuiltinLoc(ReadSourceLocation(Record, Idx)); 3811 if (TL.needsExtraLocalData()) { 3812 TL.setWrittenTypeSpec(static_cast<DeclSpec::TST>(Record[Idx++])); 3813 TL.setWrittenSignSpec(static_cast<DeclSpec::TSS>(Record[Idx++])); 3814 TL.setWrittenWidthSpec(static_cast<DeclSpec::TSW>(Record[Idx++])); 3815 TL.setModeAttr(Record[Idx++]); 3816 } 3817} 3818void TypeLocReader::VisitComplexTypeLoc(ComplexTypeLoc TL) { 3819 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3820} 3821void TypeLocReader::VisitPointerTypeLoc(PointerTypeLoc TL) { 3822 TL.setStarLoc(ReadSourceLocation(Record, Idx)); 3823} 3824void TypeLocReader::VisitBlockPointerTypeLoc(BlockPointerTypeLoc TL) { 3825 TL.setCaretLoc(ReadSourceLocation(Record, Idx)); 3826} 3827void TypeLocReader::VisitLValueReferenceTypeLoc(LValueReferenceTypeLoc TL) { 3828 TL.setAmpLoc(ReadSourceLocation(Record, Idx)); 3829} 3830void TypeLocReader::VisitRValueReferenceTypeLoc(RValueReferenceTypeLoc TL) { 3831 TL.setAmpAmpLoc(ReadSourceLocation(Record, Idx)); 3832} 3833void TypeLocReader::VisitMemberPointerTypeLoc(MemberPointerTypeLoc TL) { 3834 TL.setStarLoc(ReadSourceLocation(Record, Idx)); 3835 TL.setClassTInfo(Reader.GetTypeSourceInfo(F, Record, Idx)); 3836} 3837void TypeLocReader::VisitArrayTypeLoc(ArrayTypeLoc TL) { 3838 TL.setLBracketLoc(ReadSourceLocation(Record, Idx)); 3839 TL.setRBracketLoc(ReadSourceLocation(Record, Idx)); 3840 if (Record[Idx++]) 3841 TL.setSizeExpr(Reader.ReadExpr(F)); 3842 else 3843 TL.setSizeExpr(0); 3844} 3845void TypeLocReader::VisitConstantArrayTypeLoc(ConstantArrayTypeLoc TL) { 3846 VisitArrayTypeLoc(TL); 3847} 3848void TypeLocReader::VisitIncompleteArrayTypeLoc(IncompleteArrayTypeLoc TL) { 3849 VisitArrayTypeLoc(TL); 3850} 3851void TypeLocReader::VisitVariableArrayTypeLoc(VariableArrayTypeLoc TL) { 3852 VisitArrayTypeLoc(TL); 3853} 3854void TypeLocReader::VisitDependentSizedArrayTypeLoc( 3855 DependentSizedArrayTypeLoc TL) { 3856 VisitArrayTypeLoc(TL); 3857} 3858void TypeLocReader::VisitDependentSizedExtVectorTypeLoc( 3859 DependentSizedExtVectorTypeLoc TL) { 3860 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3861} 3862void TypeLocReader::VisitVectorTypeLoc(VectorTypeLoc TL) { 3863 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3864} 3865void TypeLocReader::VisitExtVectorTypeLoc(ExtVectorTypeLoc TL) { 3866 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3867} 3868void TypeLocReader::VisitFunctionTypeLoc(FunctionTypeLoc TL) { 3869 TL.setLocalRangeBegin(ReadSourceLocation(Record, Idx)); 3870 TL.setLocalRangeEnd(ReadSourceLocation(Record, Idx)); 3871 TL.setTrailingReturn(Record[Idx++]); 3872 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) { 3873 TL.setArg(i, ReadDeclAs<ParmVarDecl>(Record, Idx)); 3874 } 3875} 3876void TypeLocReader::VisitFunctionProtoTypeLoc(FunctionProtoTypeLoc TL) { 3877 VisitFunctionTypeLoc(TL); 3878} 3879void TypeLocReader::VisitFunctionNoProtoTypeLoc(FunctionNoProtoTypeLoc TL) { 3880 VisitFunctionTypeLoc(TL); 3881} 3882void TypeLocReader::VisitUnresolvedUsingTypeLoc(UnresolvedUsingTypeLoc TL) { 3883 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3884} 3885void TypeLocReader::VisitTypedefTypeLoc(TypedefTypeLoc TL) { 3886 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3887} 3888void TypeLocReader::VisitTypeOfExprTypeLoc(TypeOfExprTypeLoc TL) { 3889 TL.setTypeofLoc(ReadSourceLocation(Record, Idx)); 3890 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 3891 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 3892} 3893void TypeLocReader::VisitTypeOfTypeLoc(TypeOfTypeLoc TL) { 3894 TL.setTypeofLoc(ReadSourceLocation(Record, Idx)); 3895 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 3896 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 3897 TL.setUnderlyingTInfo(Reader.GetTypeSourceInfo(F, Record, Idx)); 3898} 3899void TypeLocReader::VisitDecltypeTypeLoc(DecltypeTypeLoc TL) { 3900 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3901} 3902void TypeLocReader::VisitUnaryTransformTypeLoc(UnaryTransformTypeLoc TL) { 3903 TL.setKWLoc(ReadSourceLocation(Record, Idx)); 3904 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 3905 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 3906 TL.setUnderlyingTInfo(Reader.GetTypeSourceInfo(F, Record, Idx)); 3907} 3908void TypeLocReader::VisitAutoTypeLoc(AutoTypeLoc TL) { 3909 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3910} 3911void TypeLocReader::VisitRecordTypeLoc(RecordTypeLoc TL) { 3912 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3913} 3914void TypeLocReader::VisitEnumTypeLoc(EnumTypeLoc TL) { 3915 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3916} 3917void TypeLocReader::VisitAttributedTypeLoc(AttributedTypeLoc TL) { 3918 TL.setAttrNameLoc(ReadSourceLocation(Record, Idx)); 3919 if (TL.hasAttrOperand()) { 3920 SourceRange range; 3921 range.setBegin(ReadSourceLocation(Record, Idx)); 3922 range.setEnd(ReadSourceLocation(Record, Idx)); 3923 TL.setAttrOperandParensRange(range); 3924 } 3925 if (TL.hasAttrExprOperand()) { 3926 if (Record[Idx++]) 3927 TL.setAttrExprOperand(Reader.ReadExpr(F)); 3928 else 3929 TL.setAttrExprOperand(0); 3930 } else if (TL.hasAttrEnumOperand()) 3931 TL.setAttrEnumOperandLoc(ReadSourceLocation(Record, Idx)); 3932} 3933void TypeLocReader::VisitTemplateTypeParmTypeLoc(TemplateTypeParmTypeLoc TL) { 3934 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3935} 3936void TypeLocReader::VisitSubstTemplateTypeParmTypeLoc( 3937 SubstTemplateTypeParmTypeLoc TL) { 3938 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3939} 3940void TypeLocReader::VisitSubstTemplateTypeParmPackTypeLoc( 3941 SubstTemplateTypeParmPackTypeLoc TL) { 3942 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3943} 3944void TypeLocReader::VisitTemplateSpecializationTypeLoc( 3945 TemplateSpecializationTypeLoc TL) { 3946 TL.setTemplateNameLoc(ReadSourceLocation(Record, Idx)); 3947 TL.setLAngleLoc(ReadSourceLocation(Record, Idx)); 3948 TL.setRAngleLoc(ReadSourceLocation(Record, Idx)); 3949 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 3950 TL.setArgLocInfo(i, 3951 Reader.GetTemplateArgumentLocInfo(F, 3952 TL.getTypePtr()->getArg(i).getKind(), 3953 Record, Idx)); 3954} 3955void TypeLocReader::VisitParenTypeLoc(ParenTypeLoc TL) { 3956 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 3957 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 3958} 3959void TypeLocReader::VisitElaboratedTypeLoc(ElaboratedTypeLoc TL) { 3960 TL.setKeywordLoc(ReadSourceLocation(Record, Idx)); 3961 TL.setQualifierLoc(Reader.ReadNestedNameSpecifierLoc(F, Record, Idx)); 3962} 3963void TypeLocReader::VisitInjectedClassNameTypeLoc(InjectedClassNameTypeLoc TL) { 3964 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3965} 3966void TypeLocReader::VisitDependentNameTypeLoc(DependentNameTypeLoc TL) { 3967 TL.setKeywordLoc(ReadSourceLocation(Record, Idx)); 3968 TL.setQualifierLoc(Reader.ReadNestedNameSpecifierLoc(F, Record, Idx)); 3969 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3970} 3971void TypeLocReader::VisitDependentTemplateSpecializationTypeLoc( 3972 DependentTemplateSpecializationTypeLoc TL) { 3973 TL.setKeywordLoc(ReadSourceLocation(Record, Idx)); 3974 TL.setQualifierLoc(Reader.ReadNestedNameSpecifierLoc(F, Record, Idx)); 3975 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3976 TL.setLAngleLoc(ReadSourceLocation(Record, Idx)); 3977 TL.setRAngleLoc(ReadSourceLocation(Record, Idx)); 3978 for (unsigned I = 0, E = TL.getNumArgs(); I != E; ++I) 3979 TL.setArgLocInfo(I, 3980 Reader.GetTemplateArgumentLocInfo(F, 3981 TL.getTypePtr()->getArg(I).getKind(), 3982 Record, Idx)); 3983} 3984void TypeLocReader::VisitPackExpansionTypeLoc(PackExpansionTypeLoc TL) { 3985 TL.setEllipsisLoc(ReadSourceLocation(Record, Idx)); 3986} 3987void TypeLocReader::VisitObjCInterfaceTypeLoc(ObjCInterfaceTypeLoc TL) { 3988 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3989} 3990void TypeLocReader::VisitObjCObjectTypeLoc(ObjCObjectTypeLoc TL) { 3991 TL.setHasBaseTypeAsWritten(Record[Idx++]); 3992 TL.setLAngleLoc(ReadSourceLocation(Record, Idx)); 3993 TL.setRAngleLoc(ReadSourceLocation(Record, Idx)); 3994 for (unsigned i = 0, e = TL.getNumProtocols(); i != e; ++i) 3995 TL.setProtocolLoc(i, ReadSourceLocation(Record, Idx)); 3996} 3997void TypeLocReader::VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL) { 3998 TL.setStarLoc(ReadSourceLocation(Record, Idx)); 3999} 4000 4001TypeSourceInfo *ASTReader::GetTypeSourceInfo(Module &F, 4002 const RecordData &Record, 4003 unsigned &Idx) { 4004 QualType InfoTy = readType(F, Record, Idx); 4005 if (InfoTy.isNull()) 4006 return 0; 4007 4008 TypeSourceInfo *TInfo = getContext()->CreateTypeSourceInfo(InfoTy); 4009 TypeLocReader TLR(*this, F, Record, Idx); 4010 for (TypeLoc TL = TInfo->getTypeLoc(); !TL.isNull(); TL = TL.getNextTypeLoc()) 4011 TLR.Visit(TL); 4012 return TInfo; 4013} 4014 4015QualType ASTReader::GetType(TypeID ID) { 4016 unsigned FastQuals = ID & Qualifiers::FastMask; 4017 unsigned Index = ID >> Qualifiers::FastWidth; 4018 4019 if (Index < NUM_PREDEF_TYPE_IDS) { 4020 QualType T; 4021 switch ((PredefinedTypeIDs)Index) { 4022 case PREDEF_TYPE_NULL_ID: return QualType(); 4023 case PREDEF_TYPE_VOID_ID: T = Context->VoidTy; break; 4024 case PREDEF_TYPE_BOOL_ID: T = Context->BoolTy; break; 4025 4026 case PREDEF_TYPE_CHAR_U_ID: 4027 case PREDEF_TYPE_CHAR_S_ID: 4028 // FIXME: Check that the signedness of CharTy is correct! 4029 T = Context->CharTy; 4030 break; 4031 4032 case PREDEF_TYPE_UCHAR_ID: T = Context->UnsignedCharTy; break; 4033 case PREDEF_TYPE_USHORT_ID: T = Context->UnsignedShortTy; break; 4034 case PREDEF_TYPE_UINT_ID: T = Context->UnsignedIntTy; break; 4035 case PREDEF_TYPE_ULONG_ID: T = Context->UnsignedLongTy; break; 4036 case PREDEF_TYPE_ULONGLONG_ID: T = Context->UnsignedLongLongTy; break; 4037 case PREDEF_TYPE_UINT128_ID: T = Context->UnsignedInt128Ty; break; 4038 case PREDEF_TYPE_SCHAR_ID: T = Context->SignedCharTy; break; 4039 case PREDEF_TYPE_WCHAR_ID: T = Context->WCharTy; break; 4040 case PREDEF_TYPE_SHORT_ID: T = Context->ShortTy; break; 4041 case PREDEF_TYPE_INT_ID: T = Context->IntTy; break; 4042 case PREDEF_TYPE_LONG_ID: T = Context->LongTy; break; 4043 case PREDEF_TYPE_LONGLONG_ID: T = Context->LongLongTy; break; 4044 case PREDEF_TYPE_INT128_ID: T = Context->Int128Ty; break; 4045 case PREDEF_TYPE_FLOAT_ID: T = Context->FloatTy; break; 4046 case PREDEF_TYPE_DOUBLE_ID: T = Context->DoubleTy; break; 4047 case PREDEF_TYPE_LONGDOUBLE_ID: T = Context->LongDoubleTy; break; 4048 case PREDEF_TYPE_OVERLOAD_ID: T = Context->OverloadTy; break; 4049 case PREDEF_TYPE_BOUND_MEMBER: T = Context->BoundMemberTy; break; 4050 case PREDEF_TYPE_DEPENDENT_ID: T = Context->DependentTy; break; 4051 case PREDEF_TYPE_UNKNOWN_ANY: T = Context->UnknownAnyTy; break; 4052 case PREDEF_TYPE_NULLPTR_ID: T = Context->NullPtrTy; break; 4053 case PREDEF_TYPE_CHAR16_ID: T = Context->Char16Ty; break; 4054 case PREDEF_TYPE_CHAR32_ID: T = Context->Char32Ty; break; 4055 case PREDEF_TYPE_OBJC_ID: T = Context->ObjCBuiltinIdTy; break; 4056 case PREDEF_TYPE_OBJC_CLASS: T = Context->ObjCBuiltinClassTy; break; 4057 case PREDEF_TYPE_OBJC_SEL: T = Context->ObjCBuiltinSelTy; break; 4058 case PREDEF_TYPE_AUTO_DEDUCT: T = Context->getAutoDeductType(); break; 4059 4060 case PREDEF_TYPE_AUTO_RREF_DEDUCT: 4061 T = Context->getAutoRRefDeductType(); 4062 break; 4063 } 4064 4065 assert(!T.isNull() && "Unknown predefined type"); 4066 return T.withFastQualifiers(FastQuals); 4067 } 4068 4069 Index -= NUM_PREDEF_TYPE_IDS; 4070 assert(Index < TypesLoaded.size() && "Type index out-of-range"); 4071 if (TypesLoaded[Index].isNull()) { 4072 TypesLoaded[Index] = readTypeRecord(Index); 4073 if (TypesLoaded[Index].isNull()) 4074 return QualType(); 4075 4076 TypesLoaded[Index]->setFromAST(); 4077 if (DeserializationListener) 4078 DeserializationListener->TypeRead(TypeIdx::fromTypeID(ID), 4079 TypesLoaded[Index]); 4080 } 4081 4082 return TypesLoaded[Index].withFastQualifiers(FastQuals); 4083} 4084 4085QualType ASTReader::getLocalType(Module &F, unsigned LocalID) { 4086 return GetType(getGlobalTypeID(F, LocalID)); 4087} 4088 4089serialization::TypeID 4090ASTReader::getGlobalTypeID(Module &F, unsigned LocalID) const { 4091 unsigned FastQuals = LocalID & Qualifiers::FastMask; 4092 unsigned LocalIndex = LocalID >> Qualifiers::FastWidth; 4093 4094 if (LocalIndex < NUM_PREDEF_TYPE_IDS) 4095 return LocalID; 4096 4097 ContinuousRangeMap<uint32_t, int, 2>::iterator I 4098 = F.TypeRemap.find(LocalIndex - NUM_PREDEF_TYPE_IDS); 4099 assert(I != F.TypeRemap.end() && "Invalid index into type index remap"); 4100 4101 unsigned GlobalIndex = LocalIndex + I->second; 4102 return (GlobalIndex << Qualifiers::FastWidth) | FastQuals; 4103} 4104 4105TemplateArgumentLocInfo 4106ASTReader::GetTemplateArgumentLocInfo(Module &F, 4107 TemplateArgument::ArgKind Kind, 4108 const RecordData &Record, 4109 unsigned &Index) { 4110 switch (Kind) { 4111 case TemplateArgument::Expression: 4112 return ReadExpr(F); 4113 case TemplateArgument::Type: 4114 return GetTypeSourceInfo(F, Record, Index); 4115 case TemplateArgument::Template: { 4116 NestedNameSpecifierLoc QualifierLoc = ReadNestedNameSpecifierLoc(F, Record, 4117 Index); 4118 SourceLocation TemplateNameLoc = ReadSourceLocation(F, Record, Index); 4119 return TemplateArgumentLocInfo(QualifierLoc, TemplateNameLoc, 4120 SourceLocation()); 4121 } 4122 case TemplateArgument::TemplateExpansion: { 4123 NestedNameSpecifierLoc QualifierLoc = ReadNestedNameSpecifierLoc(F, Record, 4124 Index); 4125 SourceLocation TemplateNameLoc = ReadSourceLocation(F, Record, Index); 4126 SourceLocation EllipsisLoc = ReadSourceLocation(F, Record, Index); 4127 return TemplateArgumentLocInfo(QualifierLoc, TemplateNameLoc, 4128 EllipsisLoc); 4129 } 4130 case TemplateArgument::Null: 4131 case TemplateArgument::Integral: 4132 case TemplateArgument::Declaration: 4133 case TemplateArgument::Pack: 4134 return TemplateArgumentLocInfo(); 4135 } 4136 llvm_unreachable("unexpected template argument loc"); 4137 return TemplateArgumentLocInfo(); 4138} 4139 4140TemplateArgumentLoc 4141ASTReader::ReadTemplateArgumentLoc(Module &F, 4142 const RecordData &Record, unsigned &Index) { 4143 TemplateArgument Arg = ReadTemplateArgument(F, Record, Index); 4144 4145 if (Arg.getKind() == TemplateArgument::Expression) { 4146 if (Record[Index++]) // bool InfoHasSameExpr. 4147 return TemplateArgumentLoc(Arg, TemplateArgumentLocInfo(Arg.getAsExpr())); 4148 } 4149 return TemplateArgumentLoc(Arg, GetTemplateArgumentLocInfo(F, Arg.getKind(), 4150 Record, Index)); 4151} 4152 4153Decl *ASTReader::GetExternalDecl(uint32_t ID) { 4154 return GetDecl(ID); 4155} 4156 4157uint64_t ASTReader::readCXXBaseSpecifiers(Module &M, const RecordData &Record, 4158 unsigned &Idx){ 4159 if (Idx >= Record.size()) 4160 return 0; 4161 4162 unsigned LocalID = Record[Idx++]; 4163 return getGlobalBitOffset(M, M.CXXBaseSpecifiersOffsets[LocalID - 1]); 4164} 4165 4166CXXBaseSpecifier *ASTReader::GetExternalCXXBaseSpecifiers(uint64_t Offset) { 4167 RecordLocation Loc = getLocalBitOffset(Offset); 4168 llvm::BitstreamCursor &Cursor = Loc.F->DeclsCursor; 4169 SavedStreamPosition SavedPosition(Cursor); 4170 Cursor.JumpToBit(Loc.Offset); 4171 ReadingKindTracker ReadingKind(Read_Decl, *this); 4172 RecordData Record; 4173 unsigned Code = Cursor.ReadCode(); 4174 unsigned RecCode = Cursor.ReadRecord(Code, Record); 4175 if (RecCode != DECL_CXX_BASE_SPECIFIERS) { 4176 Error("Malformed AST file: missing C++ base specifiers"); 4177 return 0; 4178 } 4179 4180 unsigned Idx = 0; 4181 unsigned NumBases = Record[Idx++]; 4182 void *Mem = Context->Allocate(sizeof(CXXBaseSpecifier) * NumBases); 4183 CXXBaseSpecifier *Bases = new (Mem) CXXBaseSpecifier [NumBases]; 4184 for (unsigned I = 0; I != NumBases; ++I) 4185 Bases[I] = ReadCXXBaseSpecifier(*Loc.F, Record, Idx); 4186 return Bases; 4187} 4188 4189serialization::DeclID 4190ASTReader::getGlobalDeclID(Module &F, unsigned LocalID) const { 4191 if (LocalID < NUM_PREDEF_DECL_IDS) 4192 return LocalID; 4193 4194 ContinuousRangeMap<uint32_t, int, 2>::iterator I 4195 = F.DeclRemap.find(LocalID - NUM_PREDEF_DECL_IDS); 4196 assert(I != F.DeclRemap.end() && "Invalid index into decl index remap"); 4197 4198 return LocalID + I->second; 4199} 4200 4201Decl *ASTReader::GetDecl(DeclID ID) { 4202 if (ID < NUM_PREDEF_DECL_IDS) { 4203 switch ((PredefinedDeclIDs)ID) { 4204 case PREDEF_DECL_NULL_ID: 4205 return 0; 4206 4207 case PREDEF_DECL_TRANSLATION_UNIT_ID: 4208 assert(Context && "No context available?"); 4209 return Context->getTranslationUnitDecl(); 4210 4211 case PREDEF_DECL_OBJC_ID_ID: 4212 assert(Context && "No context available?"); 4213 return Context->getObjCIdDecl(); 4214 4215 case PREDEF_DECL_OBJC_SEL_ID: 4216 assert(Context && "No context available?"); 4217 return Context->getObjCSelDecl(); 4218 4219 case PREDEF_DECL_OBJC_CLASS_ID: 4220 assert(Context && "No context available?"); 4221 return Context->getObjCClassDecl(); 4222 4223 case PREDEF_DECL_INT_128_ID: 4224 assert(Context && "No context available?"); 4225 return Context->getInt128Decl(); 4226 4227 case PREDEF_DECL_UNSIGNED_INT_128_ID: 4228 assert(Context && "No context available?"); 4229 return Context->getUInt128Decl(); 4230 } 4231 4232 return 0; 4233 } 4234 4235 unsigned Index = ID - NUM_PREDEF_DECL_IDS; 4236 4237 if (Index > DeclsLoaded.size()) { 4238 Error("declaration ID out-of-range for AST file"); 4239 return 0; 4240 } 4241 4242if (!DeclsLoaded[Index]) { 4243 ReadDeclRecord(ID); 4244 if (DeserializationListener) 4245 DeserializationListener->DeclRead(ID, DeclsLoaded[Index]); 4246 } 4247 4248 return DeclsLoaded[Index]; 4249} 4250 4251serialization::DeclID ASTReader::ReadDeclID(Module &F, 4252 const RecordData &Record, 4253 unsigned &Idx) { 4254 if (Idx >= Record.size()) { 4255 Error("Corrupted AST file"); 4256 return 0; 4257 } 4258 4259 return getGlobalDeclID(F, Record[Idx++]); 4260} 4261 4262/// \brief Resolve the offset of a statement into a statement. 4263/// 4264/// This operation will read a new statement from the external 4265/// source each time it is called, and is meant to be used via a 4266/// LazyOffsetPtr (which is used by Decls for the body of functions, etc). 4267Stmt *ASTReader::GetExternalDeclStmt(uint64_t Offset) { 4268 // Switch case IDs are per Decl. 4269 ClearSwitchCaseIDs(); 4270 4271 // Offset here is a global offset across the entire chain. 4272 RecordLocation Loc = getLocalBitOffset(Offset); 4273 Loc.F->DeclsCursor.JumpToBit(Loc.Offset); 4274 return ReadStmtFromStream(*Loc.F); 4275} 4276 4277ExternalLoadResult ASTReader::FindExternalLexicalDecls(const DeclContext *DC, 4278 bool (*isKindWeWant)(Decl::Kind), 4279 SmallVectorImpl<Decl*> &Decls) { 4280 // There might be lexical decls in multiple parts of the chain, for the TU 4281 // at least. 4282 // DeclContextOffsets might reallocate as we load additional decls below, 4283 // so make a copy of the vector. 4284 DeclContextInfos Infos = DeclContextOffsets[DC]; 4285 for (DeclContextInfos::iterator I = Infos.begin(), E = Infos.end(); 4286 I != E; ++I) { 4287 // IDs can be 0 if this context doesn't contain declarations. 4288 if (!I->LexicalDecls) 4289 continue; 4290 4291 // Load all of the declaration IDs 4292 for (const KindDeclIDPair *ID = I->LexicalDecls, 4293 *IDE = ID + I->NumLexicalDecls; ID != IDE; ++ID) { 4294 if (isKindWeWant && !isKindWeWant((Decl::Kind)ID->first)) 4295 continue; 4296 4297 Decl *D = GetLocalDecl(*I->F, ID->second); 4298 assert(D && "Null decl in lexical decls"); 4299 Decls.push_back(D); 4300 } 4301 } 4302 4303 ++NumLexicalDeclContextsRead; 4304 return ELR_Success; 4305} 4306 4307DeclContext::lookup_result 4308ASTReader::FindExternalVisibleDeclsByName(const DeclContext *DC, 4309 DeclarationName Name) { 4310 assert(DC->hasExternalVisibleStorage() && 4311 "DeclContext has no visible decls in storage"); 4312 if (!Name) 4313 return DeclContext::lookup_result(DeclContext::lookup_iterator(0), 4314 DeclContext::lookup_iterator(0)); 4315 4316 SmallVector<NamedDecl *, 64> Decls; 4317 // There might be visible decls in multiple parts of the chain, for the TU 4318 // and namespaces. For any given name, the last available results replace 4319 // all earlier ones. For this reason, we walk in reverse. 4320 // Copy the DeclContextInfos vector instead of using a reference to the 4321 // vector stored in the map, because DeclContextOffsets can change while 4322 // we load declarations with GetLocalDeclAs. 4323 DeclContextInfos Infos = DeclContextOffsets[DC]; 4324 for (DeclContextInfos::reverse_iterator I = Infos.rbegin(), E = Infos.rend(); 4325 I != E; ++I) { 4326 if (!I->NameLookupTableData) 4327 continue; 4328 4329 ASTDeclContextNameLookupTable *LookupTable = 4330 (ASTDeclContextNameLookupTable*)I->NameLookupTableData; 4331 ASTDeclContextNameLookupTable::iterator Pos = LookupTable->find(Name); 4332 if (Pos == LookupTable->end()) 4333 continue; 4334 4335 ASTDeclContextNameLookupTrait::data_type Data = *Pos; 4336 for (; Data.first != Data.second; ++Data.first) { 4337 NamedDecl *ND = GetLocalDeclAs<NamedDecl>(*I->F, *Data.first); 4338 if (!ND) 4339 continue; 4340 4341 if (ND->getDeclName() != Name) { 4342 assert(!Name.getCXXNameType().isNull() && 4343 "Name mismatch without a type"); 4344 continue; 4345 } 4346 4347 Decls.push_back(ND); 4348 } 4349 4350 // If we rejected all of the declarations we found, e.g., because the 4351 // name didn't actually match, continue looking through DeclContexts. 4352 if (Decls.empty()) 4353 continue; 4354 4355 break; 4356 } 4357 4358 ++NumVisibleDeclContextsRead; 4359 4360 SetExternalVisibleDeclsForName(DC, Name, Decls); 4361 return const_cast<DeclContext*>(DC)->lookup(Name); 4362} 4363 4364void ASTReader::MaterializeVisibleDecls(const DeclContext *DC) { 4365 assert(DC->hasExternalVisibleStorage() && 4366 "DeclContext has no visible decls in storage"); 4367 4368 SmallVector<NamedDecl *, 64> Decls; 4369 // There might be visible decls in multiple parts of the chain, for the TU 4370 // and namespaces. 4371 DeclContextInfos &Infos = DeclContextOffsets[DC]; 4372 for (DeclContextInfos::iterator I = Infos.begin(), E = Infos.end(); 4373 I != E; ++I) { 4374 if (!I->NameLookupTableData) 4375 continue; 4376 4377 ASTDeclContextNameLookupTable *LookupTable = 4378 (ASTDeclContextNameLookupTable*)I->NameLookupTableData; 4379 for (ASTDeclContextNameLookupTable::item_iterator 4380 ItemI = LookupTable->item_begin(), 4381 ItemEnd = LookupTable->item_end() ; ItemI != ItemEnd; ++ItemI) { 4382 ASTDeclContextNameLookupTable::item_iterator::value_type Val 4383 = *ItemI; 4384 ASTDeclContextNameLookupTrait::data_type Data = Val.second; 4385 Decls.clear(); 4386 for (; Data.first != Data.second; ++Data.first) 4387 Decls.push_back(GetLocalDeclAs<NamedDecl>(*I->F, *Data.first)); 4388 MaterializeVisibleDeclsForName(DC, Val.first, Decls); 4389 } 4390 } 4391} 4392 4393void ASTReader::PassInterestingDeclsToConsumer() { 4394 assert(Consumer); 4395 while (!InterestingDecls.empty()) { 4396 DeclGroupRef DG(InterestingDecls.front()); 4397 InterestingDecls.pop_front(); 4398 Consumer->HandleInterestingDecl(DG); 4399 } 4400} 4401 4402void ASTReader::StartTranslationUnit(ASTConsumer *Consumer) { 4403 this->Consumer = Consumer; 4404 4405 if (!Consumer) 4406 return; 4407 4408 for (unsigned I = 0, N = ExternalDefinitions.size(); I != N; ++I) { 4409 // Force deserialization of this decl, which will cause it to be queued for 4410 // passing to the consumer. 4411 GetDecl(ExternalDefinitions[I]); 4412 } 4413 4414 PassInterestingDeclsToConsumer(); 4415} 4416 4417void ASTReader::PrintStats() { 4418 std::fprintf(stderr, "*** AST File Statistics:\n"); 4419 4420 unsigned NumTypesLoaded 4421 = TypesLoaded.size() - std::count(TypesLoaded.begin(), TypesLoaded.end(), 4422 QualType()); 4423 unsigned NumDeclsLoaded 4424 = DeclsLoaded.size() - std::count(DeclsLoaded.begin(), DeclsLoaded.end(), 4425 (Decl *)0); 4426 unsigned NumIdentifiersLoaded 4427 = IdentifiersLoaded.size() - std::count(IdentifiersLoaded.begin(), 4428 IdentifiersLoaded.end(), 4429 (IdentifierInfo *)0); 4430 unsigned NumSelectorsLoaded 4431 = SelectorsLoaded.size() - std::count(SelectorsLoaded.begin(), 4432 SelectorsLoaded.end(), 4433 Selector()); 4434 4435 std::fprintf(stderr, " %u stat cache hits\n", NumStatHits); 4436 std::fprintf(stderr, " %u stat cache misses\n", NumStatMisses); 4437 if (unsigned TotalNumSLocEntries = getTotalNumSLocs()) 4438 std::fprintf(stderr, " %u/%u source location entries read (%f%%)\n", 4439 NumSLocEntriesRead, TotalNumSLocEntries, 4440 ((float)NumSLocEntriesRead/TotalNumSLocEntries * 100)); 4441 if (!TypesLoaded.empty()) 4442 std::fprintf(stderr, " %u/%u types read (%f%%)\n", 4443 NumTypesLoaded, (unsigned)TypesLoaded.size(), 4444 ((float)NumTypesLoaded/TypesLoaded.size() * 100)); 4445 if (!DeclsLoaded.empty()) 4446 std::fprintf(stderr, " %u/%u declarations read (%f%%)\n", 4447 NumDeclsLoaded, (unsigned)DeclsLoaded.size(), 4448 ((float)NumDeclsLoaded/DeclsLoaded.size() * 100)); 4449 if (!IdentifiersLoaded.empty()) 4450 std::fprintf(stderr, " %u/%u identifiers read (%f%%)\n", 4451 NumIdentifiersLoaded, (unsigned)IdentifiersLoaded.size(), 4452 ((float)NumIdentifiersLoaded/IdentifiersLoaded.size() * 100)); 4453 if (!SelectorsLoaded.empty()) 4454 std::fprintf(stderr, " %u/%u selectors read (%f%%)\n", 4455 NumSelectorsLoaded, (unsigned)SelectorsLoaded.size(), 4456 ((float)NumSelectorsLoaded/SelectorsLoaded.size() * 100)); 4457 if (TotalNumStatements) 4458 std::fprintf(stderr, " %u/%u statements read (%f%%)\n", 4459 NumStatementsRead, TotalNumStatements, 4460 ((float)NumStatementsRead/TotalNumStatements * 100)); 4461 if (TotalNumMacros) 4462 std::fprintf(stderr, " %u/%u macros read (%f%%)\n", 4463 NumMacrosRead, TotalNumMacros, 4464 ((float)NumMacrosRead/TotalNumMacros * 100)); 4465 if (TotalLexicalDeclContexts) 4466 std::fprintf(stderr, " %u/%u lexical declcontexts read (%f%%)\n", 4467 NumLexicalDeclContextsRead, TotalLexicalDeclContexts, 4468 ((float)NumLexicalDeclContextsRead/TotalLexicalDeclContexts 4469 * 100)); 4470 if (TotalVisibleDeclContexts) 4471 std::fprintf(stderr, " %u/%u visible declcontexts read (%f%%)\n", 4472 NumVisibleDeclContextsRead, TotalVisibleDeclContexts, 4473 ((float)NumVisibleDeclContextsRead/TotalVisibleDeclContexts 4474 * 100)); 4475 if (TotalNumMethodPoolEntries) { 4476 std::fprintf(stderr, " %u/%u method pool entries read (%f%%)\n", 4477 NumMethodPoolEntriesRead, TotalNumMethodPoolEntries, 4478 ((float)NumMethodPoolEntriesRead/TotalNumMethodPoolEntries 4479 * 100)); 4480 std::fprintf(stderr, " %u method pool misses\n", NumMethodPoolMisses); 4481 } 4482 std::fprintf(stderr, "\n"); 4483 dump(); 4484 std::fprintf(stderr, "\n"); 4485} 4486 4487template<typename Key, typename Module, unsigned InitialCapacity> 4488static void 4489dumpModuleIDMap(StringRef Name, 4490 const ContinuousRangeMap<Key, Module *, 4491 InitialCapacity> &Map) { 4492 if (Map.begin() == Map.end()) 4493 return; 4494 4495 typedef ContinuousRangeMap<Key, Module *, InitialCapacity> MapType; 4496 llvm::errs() << Name << ":\n"; 4497 for (typename MapType::const_iterator I = Map.begin(), IEnd = Map.end(); 4498 I != IEnd; ++I) { 4499 llvm::errs() << " " << I->first << " -> " << I->second->FileName 4500 << "\n"; 4501 } 4502} 4503 4504void ASTReader::dump() { 4505 llvm::errs() << "*** PCH/Module Remappings:\n"; 4506 dumpModuleIDMap("Global bit offset map", GlobalBitOffsetsMap); 4507 dumpModuleIDMap("Global source location entry map", GlobalSLocEntryMap); 4508 dumpModuleIDMap("Global type map", GlobalTypeMap); 4509 dumpModuleIDMap("Global declaration map", GlobalDeclMap); 4510 dumpModuleIDMap("Global identifier map", GlobalIdentifierMap); 4511 dumpModuleIDMap("Global selector map", GlobalSelectorMap); 4512 dumpModuleIDMap("Global macro definition map", GlobalMacroDefinitionMap); 4513 dumpModuleIDMap("Global preprocessed entity map", 4514 GlobalPreprocessedEntityMap); 4515 4516 llvm::errs() << "\n*** PCH/Modules Loaded:"; 4517 for (ModuleManager::ModuleConstIterator M = ModuleMgr.begin(), 4518 MEnd = ModuleMgr.end(); 4519 M != MEnd; ++M) 4520 (*M)->dump(); 4521} 4522 4523/// Return the amount of memory used by memory buffers, breaking down 4524/// by heap-backed versus mmap'ed memory. 4525void ASTReader::getMemoryBufferSizes(MemoryBufferSizes &sizes) const { 4526 for (ModuleConstIterator I = ModuleMgr.begin(), 4527 E = ModuleMgr.end(); I != E; ++I) { 4528 if (llvm::MemoryBuffer *buf = (*I)->Buffer.get()) { 4529 size_t bytes = buf->getBufferSize(); 4530 switch (buf->getBufferKind()) { 4531 case llvm::MemoryBuffer::MemoryBuffer_Malloc: 4532 sizes.malloc_bytes += bytes; 4533 break; 4534 case llvm::MemoryBuffer::MemoryBuffer_MMap: 4535 sizes.mmap_bytes += bytes; 4536 break; 4537 } 4538 } 4539 } 4540} 4541 4542void ASTReader::InitializeSema(Sema &S) { 4543 SemaObj = &S; 4544 S.ExternalSource = this; 4545 4546 // Makes sure any declarations that were deserialized "too early" 4547 // still get added to the identifier's declaration chains. 4548 for (unsigned I = 0, N = PreloadedDecls.size(); I != N; ++I) { 4549 if (SemaObj->TUScope) 4550 SemaObj->TUScope->AddDecl(PreloadedDecls[I]); 4551 4552 SemaObj->IdResolver.AddDecl(PreloadedDecls[I]); 4553 } 4554 PreloadedDecls.clear(); 4555 4556 // Load the offsets of the declarations that Sema references. 4557 // They will be lazily deserialized when needed. 4558 if (!SemaDeclRefs.empty()) { 4559 assert(SemaDeclRefs.size() == 2 && "More decl refs than expected!"); 4560 if (!SemaObj->StdNamespace) 4561 SemaObj->StdNamespace = SemaDeclRefs[0]; 4562 if (!SemaObj->StdBadAlloc) 4563 SemaObj->StdBadAlloc = SemaDeclRefs[1]; 4564 } 4565 4566 if (!FPPragmaOptions.empty()) { 4567 assert(FPPragmaOptions.size() == 1 && "Wrong number of FP_PRAGMA_OPTIONS"); 4568 SemaObj->FPFeatures.fp_contract = FPPragmaOptions[0]; 4569 } 4570 4571 if (!OpenCLExtensions.empty()) { 4572 unsigned I = 0; 4573#define OPENCLEXT(nm) SemaObj->OpenCLFeatures.nm = OpenCLExtensions[I++]; 4574#include "clang/Basic/OpenCLExtensions.def" 4575 4576 assert(OpenCLExtensions.size() == I && "Wrong number of OPENCL_EXTENSIONS"); 4577 } 4578} 4579 4580IdentifierInfo* ASTReader::get(const char *NameStart, const char *NameEnd) { 4581 // Try to find this name within our on-disk hash tables. We start with the 4582 // most recent one, since that one contains the most up-to-date info. 4583 for (ModuleIterator I = ModuleMgr.begin(), E = ModuleMgr.end(); I != E; ++I) { 4584 ASTIdentifierLookupTable *IdTable 4585 = (ASTIdentifierLookupTable *)(*I)->IdentifierLookupTable; 4586 if (!IdTable) 4587 continue; 4588 std::pair<const char*, unsigned> Key(NameStart, NameEnd - NameStart); 4589 ASTIdentifierLookupTable::iterator Pos = IdTable->find(Key); 4590 if (Pos == IdTable->end()) 4591 continue; 4592 4593 // Dereferencing the iterator has the effect of building the 4594 // IdentifierInfo node and populating it with the various 4595 // declarations it needs. 4596 return *Pos; 4597 } 4598 return 0; 4599} 4600 4601namespace clang { 4602 /// \brief An identifier-lookup iterator that enumerates all of the 4603 /// identifiers stored within a set of AST files. 4604 class ASTIdentifierIterator : public IdentifierIterator { 4605 /// \brief The AST reader whose identifiers are being enumerated. 4606 const ASTReader &Reader; 4607 4608 /// \brief The current index into the chain of AST files stored in 4609 /// the AST reader. 4610 unsigned Index; 4611 4612 /// \brief The current position within the identifier lookup table 4613 /// of the current AST file. 4614 ASTIdentifierLookupTable::key_iterator Current; 4615 4616 /// \brief The end position within the identifier lookup table of 4617 /// the current AST file. 4618 ASTIdentifierLookupTable::key_iterator End; 4619 4620 public: 4621 explicit ASTIdentifierIterator(const ASTReader &Reader); 4622 4623 virtual StringRef Next(); 4624 }; 4625} 4626 4627ASTIdentifierIterator::ASTIdentifierIterator(const ASTReader &Reader) 4628 : Reader(Reader), Index(Reader.ModuleMgr.size() - 1) { 4629 ASTIdentifierLookupTable *IdTable 4630 = (ASTIdentifierLookupTable *)Reader.ModuleMgr[Index].IdentifierLookupTable; 4631 Current = IdTable->key_begin(); 4632 End = IdTable->key_end(); 4633} 4634 4635StringRef ASTIdentifierIterator::Next() { 4636 while (Current == End) { 4637 // If we have exhausted all of our AST files, we're done. 4638 if (Index == 0) 4639 return StringRef(); 4640 4641 --Index; 4642 ASTIdentifierLookupTable *IdTable 4643 = (ASTIdentifierLookupTable *)Reader.ModuleMgr[Index]. 4644 IdentifierLookupTable; 4645 Current = IdTable->key_begin(); 4646 End = IdTable->key_end(); 4647 } 4648 4649 // We have any identifiers remaining in the current AST file; return 4650 // the next one. 4651 std::pair<const char*, unsigned> Key = *Current; 4652 ++Current; 4653 return StringRef(Key.first, Key.second); 4654} 4655 4656IdentifierIterator *ASTReader::getIdentifiers() const { 4657 return new ASTIdentifierIterator(*this); 4658} 4659 4660std::pair<ObjCMethodList, ObjCMethodList> 4661ASTReader::ReadMethodPool(Selector Sel) { 4662 // Find this selector in a hash table. We want to find the most recent entry. 4663 for (ModuleIterator I = ModuleMgr.begin(), E = ModuleMgr.end(); I != E; ++I) { 4664 Module &F = *(*I); 4665 if (!F.SelectorLookupTable) 4666 continue; 4667 4668 ASTSelectorLookupTable *PoolTable 4669 = (ASTSelectorLookupTable*)F.SelectorLookupTable; 4670 ASTSelectorLookupTable::iterator Pos = PoolTable->find(Sel); 4671 if (Pos != PoolTable->end()) { 4672 ++NumSelectorsRead; 4673 // FIXME: Not quite happy with the statistics here. We probably should 4674 // disable this tracking when called via LoadSelector. 4675 // Also, should entries without methods count as misses? 4676 ++NumMethodPoolEntriesRead; 4677 ASTSelectorLookupTrait::data_type Data = *Pos; 4678 if (DeserializationListener) 4679 DeserializationListener->SelectorRead(Data.ID, Sel); 4680 return std::make_pair(Data.Instance, Data.Factory); 4681 } 4682 } 4683 4684 ++NumMethodPoolMisses; 4685 return std::pair<ObjCMethodList, ObjCMethodList>(); 4686} 4687 4688void ASTReader::ReadKnownNamespaces( 4689 SmallVectorImpl<NamespaceDecl *> &Namespaces) { 4690 Namespaces.clear(); 4691 4692 for (unsigned I = 0, N = KnownNamespaces.size(); I != N; ++I) { 4693 if (NamespaceDecl *Namespace 4694 = dyn_cast_or_null<NamespaceDecl>(GetDecl(KnownNamespaces[I]))) 4695 Namespaces.push_back(Namespace); 4696 } 4697} 4698 4699void ASTReader::ReadTentativeDefinitions( 4700 SmallVectorImpl<VarDecl *> &TentativeDefs) { 4701 for (unsigned I = 0, N = TentativeDefinitions.size(); I != N; ++I) { 4702 VarDecl *Var = dyn_cast_or_null<VarDecl>(GetDecl(TentativeDefinitions[I])); 4703 if (Var) 4704 TentativeDefs.push_back(Var); 4705 } 4706 TentativeDefinitions.clear(); 4707} 4708 4709void ASTReader::ReadUnusedFileScopedDecls( 4710 SmallVectorImpl<const DeclaratorDecl *> &Decls) { 4711 for (unsigned I = 0, N = UnusedFileScopedDecls.size(); I != N; ++I) { 4712 DeclaratorDecl *D 4713 = dyn_cast_or_null<DeclaratorDecl>(GetDecl(UnusedFileScopedDecls[I])); 4714 if (D) 4715 Decls.push_back(D); 4716 } 4717 UnusedFileScopedDecls.clear(); 4718} 4719 4720void ASTReader::ReadDelegatingConstructors( 4721 SmallVectorImpl<CXXConstructorDecl *> &Decls) { 4722 for (unsigned I = 0, N = DelegatingCtorDecls.size(); I != N; ++I) { 4723 CXXConstructorDecl *D 4724 = dyn_cast_or_null<CXXConstructorDecl>(GetDecl(DelegatingCtorDecls[I])); 4725 if (D) 4726 Decls.push_back(D); 4727 } 4728 DelegatingCtorDecls.clear(); 4729} 4730 4731void ASTReader::ReadExtVectorDecls(SmallVectorImpl<TypedefNameDecl *> &Decls) { 4732 for (unsigned I = 0, N = ExtVectorDecls.size(); I != N; ++I) { 4733 TypedefNameDecl *D 4734 = dyn_cast_or_null<TypedefNameDecl>(GetDecl(ExtVectorDecls[I])); 4735 if (D) 4736 Decls.push_back(D); 4737 } 4738 ExtVectorDecls.clear(); 4739} 4740 4741void ASTReader::ReadDynamicClasses(SmallVectorImpl<CXXRecordDecl *> &Decls) { 4742 for (unsigned I = 0, N = DynamicClasses.size(); I != N; ++I) { 4743 CXXRecordDecl *D 4744 = dyn_cast_or_null<CXXRecordDecl>(GetDecl(DynamicClasses[I])); 4745 if (D) 4746 Decls.push_back(D); 4747 } 4748 DynamicClasses.clear(); 4749} 4750 4751void 4752ASTReader::ReadLocallyScopedExternalDecls(SmallVectorImpl<NamedDecl *> &Decls) { 4753 for (unsigned I = 0, N = LocallyScopedExternalDecls.size(); I != N; ++I) { 4754 NamedDecl *D 4755 = dyn_cast_or_null<NamedDecl>(GetDecl(LocallyScopedExternalDecls[I])); 4756 if (D) 4757 Decls.push_back(D); 4758 } 4759 LocallyScopedExternalDecls.clear(); 4760} 4761 4762void ASTReader::ReadReferencedSelectors( 4763 SmallVectorImpl<std::pair<Selector, SourceLocation> > &Sels) { 4764 if (ReferencedSelectorsData.empty()) 4765 return; 4766 4767 // If there are @selector references added them to its pool. This is for 4768 // implementation of -Wselector. 4769 unsigned int DataSize = ReferencedSelectorsData.size()-1; 4770 unsigned I = 0; 4771 while (I < DataSize) { 4772 Selector Sel = DecodeSelector(ReferencedSelectorsData[I++]); 4773 SourceLocation SelLoc 4774 = SourceLocation::getFromRawEncoding(ReferencedSelectorsData[I++]); 4775 Sels.push_back(std::make_pair(Sel, SelLoc)); 4776 } 4777 ReferencedSelectorsData.clear(); 4778} 4779 4780void ASTReader::ReadWeakUndeclaredIdentifiers( 4781 SmallVectorImpl<std::pair<IdentifierInfo *, WeakInfo> > &WeakIDs) { 4782 if (WeakUndeclaredIdentifiers.empty()) 4783 return; 4784 4785 for (unsigned I = 0, N = WeakUndeclaredIdentifiers.size(); I < N; /*none*/) { 4786 IdentifierInfo *WeakId 4787 = DecodeIdentifierInfo(WeakUndeclaredIdentifiers[I++]); 4788 IdentifierInfo *AliasId 4789 = DecodeIdentifierInfo(WeakUndeclaredIdentifiers[I++]); 4790 SourceLocation Loc 4791 = SourceLocation::getFromRawEncoding(WeakUndeclaredIdentifiers[I++]); 4792 bool Used = WeakUndeclaredIdentifiers[I++]; 4793 WeakInfo WI(AliasId, Loc); 4794 WI.setUsed(Used); 4795 WeakIDs.push_back(std::make_pair(WeakId, WI)); 4796 } 4797 WeakUndeclaredIdentifiers.clear(); 4798} 4799 4800void ASTReader::ReadUsedVTables(SmallVectorImpl<ExternalVTableUse> &VTables) { 4801 for (unsigned Idx = 0, N = VTableUses.size(); Idx < N; /* In loop */) { 4802 ExternalVTableUse VT; 4803 VT.Record = dyn_cast_or_null<CXXRecordDecl>(GetDecl(VTableUses[Idx++])); 4804 VT.Location = SourceLocation::getFromRawEncoding(VTableUses[Idx++]); 4805 VT.DefinitionRequired = VTableUses[Idx++]; 4806 VTables.push_back(VT); 4807 } 4808 4809 VTableUses.clear(); 4810} 4811 4812void ASTReader::ReadPendingInstantiations( 4813 SmallVectorImpl<std::pair<ValueDecl *, SourceLocation> > &Pending) { 4814 for (unsigned Idx = 0, N = PendingInstantiations.size(); Idx < N;) { 4815 ValueDecl *D = cast<ValueDecl>(GetDecl(PendingInstantiations[Idx++])); 4816 SourceLocation Loc 4817 = SourceLocation::getFromRawEncoding(PendingInstantiations[Idx++]); 4818 Pending.push_back(std::make_pair(D, Loc)); 4819 } 4820 PendingInstantiations.clear(); 4821} 4822 4823void ASTReader::LoadSelector(Selector Sel) { 4824 // It would be complicated to avoid reading the methods anyway. So don't. 4825 ReadMethodPool(Sel); 4826} 4827 4828void ASTReader::SetIdentifierInfo(IdentifierID ID, IdentifierInfo *II) { 4829 assert(ID && "Non-zero identifier ID required"); 4830 assert(ID <= IdentifiersLoaded.size() && "identifier ID out of range"); 4831 IdentifiersLoaded[ID - 1] = II; 4832 if (DeserializationListener) 4833 DeserializationListener->IdentifierRead(ID, II); 4834} 4835 4836/// \brief Set the globally-visible declarations associated with the given 4837/// identifier. 4838/// 4839/// If the AST reader is currently in a state where the given declaration IDs 4840/// cannot safely be resolved, they are queued until it is safe to resolve 4841/// them. 4842/// 4843/// \param II an IdentifierInfo that refers to one or more globally-visible 4844/// declarations. 4845/// 4846/// \param DeclIDs the set of declaration IDs with the name @p II that are 4847/// visible at global scope. 4848/// 4849/// \param Nonrecursive should be true to indicate that the caller knows that 4850/// this call is non-recursive, and therefore the globally-visible declarations 4851/// will not be placed onto the pending queue. 4852void 4853ASTReader::SetGloballyVisibleDecls(IdentifierInfo *II, 4854 const SmallVectorImpl<uint32_t> &DeclIDs, 4855 bool Nonrecursive) { 4856 if (NumCurrentElementsDeserializing && !Nonrecursive) { 4857 PendingIdentifierInfos.push_back(PendingIdentifierInfo()); 4858 PendingIdentifierInfo &PII = PendingIdentifierInfos.back(); 4859 PII.II = II; 4860 PII.DeclIDs.append(DeclIDs.begin(), DeclIDs.end()); 4861 return; 4862 } 4863 4864 for (unsigned I = 0, N = DeclIDs.size(); I != N; ++I) { 4865 NamedDecl *D = cast<NamedDecl>(GetDecl(DeclIDs[I])); 4866 if (SemaObj) { 4867 if (SemaObj->TUScope) { 4868 // Introduce this declaration into the translation-unit scope 4869 // and add it to the declaration chain for this identifier, so 4870 // that (unqualified) name lookup will find it. 4871 SemaObj->TUScope->AddDecl(D); 4872 } 4873 SemaObj->IdResolver.AddDeclToIdentifierChain(II, D); 4874 } else { 4875 // Queue this declaration so that it will be added to the 4876 // translation unit scope and identifier's declaration chain 4877 // once a Sema object is known. 4878 PreloadedDecls.push_back(D); 4879 } 4880 } 4881} 4882 4883IdentifierInfo *ASTReader::DecodeIdentifierInfo(IdentifierID ID) { 4884 if (ID == 0) 4885 return 0; 4886 4887 if (IdentifiersLoaded.empty()) { 4888 Error("no identifier table in AST file"); 4889 return 0; 4890 } 4891 4892 assert(PP && "Forgot to set Preprocessor ?"); 4893 ID -= 1; 4894 if (!IdentifiersLoaded[ID]) { 4895 GlobalIdentifierMapType::iterator I = GlobalIdentifierMap.find(ID + 1); 4896 assert(I != GlobalIdentifierMap.end() && "Corrupted global identifier map"); 4897 Module *M = I->second; 4898 unsigned Index = ID - M->BaseIdentifierID; 4899 const char *Str = M->IdentifierTableData + M->IdentifierOffsets[Index]; 4900 4901 // All of the strings in the AST file are preceded by a 16-bit length. 4902 // Extract that 16-bit length to avoid having to execute strlen(). 4903 // NOTE: 'StrLenPtr' is an 'unsigned char*' so that we load bytes as 4904 // unsigned integers. This is important to avoid integer overflow when 4905 // we cast them to 'unsigned'. 4906 const unsigned char *StrLenPtr = (const unsigned char*) Str - 2; 4907 unsigned StrLen = (((unsigned) StrLenPtr[0]) 4908 | (((unsigned) StrLenPtr[1]) << 8)) - 1; 4909 IdentifiersLoaded[ID] 4910 = &PP->getIdentifierTable().get(StringRef(Str, StrLen)); 4911 if (DeserializationListener) 4912 DeserializationListener->IdentifierRead(ID + 1, IdentifiersLoaded[ID]); 4913 } 4914 4915 return IdentifiersLoaded[ID]; 4916} 4917 4918IdentifierInfo *ASTReader::getLocalIdentifier(Module &M, unsigned LocalID) { 4919 return DecodeIdentifierInfo(getGlobalIdentifierID(M, LocalID)); 4920} 4921 4922IdentifierID ASTReader::getGlobalIdentifierID(Module &M, unsigned LocalID) { 4923 if (LocalID < NUM_PREDEF_IDENT_IDS) 4924 return LocalID; 4925 4926 ContinuousRangeMap<uint32_t, int, 2>::iterator I 4927 = M.IdentifierRemap.find(LocalID - NUM_PREDEF_IDENT_IDS); 4928 assert(I != M.IdentifierRemap.end() 4929 && "Invalid index into identifier index remap"); 4930 4931 return LocalID + I->second; 4932} 4933 4934bool ASTReader::ReadSLocEntry(int ID) { 4935 return ReadSLocEntryRecord(ID) != Success; 4936} 4937 4938Selector ASTReader::getLocalSelector(Module &M, unsigned LocalID) { 4939 return DecodeSelector(getGlobalSelectorID(M, LocalID)); 4940} 4941 4942Selector ASTReader::DecodeSelector(serialization::SelectorID ID) { 4943 if (ID == 0) 4944 return Selector(); 4945 4946 if (ID > SelectorsLoaded.size()) { 4947 Error("selector ID out of range in AST file"); 4948 return Selector(); 4949 } 4950 4951 if (SelectorsLoaded[ID - 1].getAsOpaquePtr() == 0) { 4952 // Load this selector from the selector table. 4953 GlobalSelectorMapType::iterator I = GlobalSelectorMap.find(ID); 4954 assert(I != GlobalSelectorMap.end() && "Corrupted global selector map"); 4955 Module &M = *I->second; 4956 ASTSelectorLookupTrait Trait(*this, M); 4957 unsigned Idx = ID - M.BaseSelectorID - NUM_PREDEF_SELECTOR_IDS; 4958 SelectorsLoaded[ID - 1] = 4959 Trait.ReadKey(M.SelectorLookupTableData + M.SelectorOffsets[Idx], 0); 4960 if (DeserializationListener) 4961 DeserializationListener->SelectorRead(ID, SelectorsLoaded[ID - 1]); 4962 } 4963 4964 return SelectorsLoaded[ID - 1]; 4965} 4966 4967Selector ASTReader::GetExternalSelector(serialization::SelectorID ID) { 4968 return DecodeSelector(ID); 4969} 4970 4971uint32_t ASTReader::GetNumExternalSelectors() { 4972 // ID 0 (the null selector) is considered an external selector. 4973 return getTotalNumSelectors() + 1; 4974} 4975 4976serialization::SelectorID 4977ASTReader::getGlobalSelectorID(Module &M, unsigned LocalID) const { 4978 if (LocalID < NUM_PREDEF_SELECTOR_IDS) 4979 return LocalID; 4980 4981 ContinuousRangeMap<uint32_t, int, 2>::iterator I 4982 = M.SelectorRemap.find(LocalID - NUM_PREDEF_SELECTOR_IDS); 4983 assert(I != M.SelectorRemap.end() 4984 && "Invalid index into identifier index remap"); 4985 4986 return LocalID + I->second; 4987} 4988 4989DeclarationName 4990ASTReader::ReadDeclarationName(Module &F, 4991 const RecordData &Record, unsigned &Idx) { 4992 DeclarationName::NameKind Kind = (DeclarationName::NameKind)Record[Idx++]; 4993 switch (Kind) { 4994 case DeclarationName::Identifier: 4995 return DeclarationName(GetIdentifierInfo(F, Record, Idx)); 4996 4997 case DeclarationName::ObjCZeroArgSelector: 4998 case DeclarationName::ObjCOneArgSelector: 4999 case DeclarationName::ObjCMultiArgSelector: 5000 return DeclarationName(ReadSelector(F, Record, Idx)); 5001 5002 case DeclarationName::CXXConstructorName: 5003 return Context->DeclarationNames.getCXXConstructorName( 5004 Context->getCanonicalType(readType(F, Record, Idx))); 5005 5006 case DeclarationName::CXXDestructorName: 5007 return Context->DeclarationNames.getCXXDestructorName( 5008 Context->getCanonicalType(readType(F, Record, Idx))); 5009 5010 case DeclarationName::CXXConversionFunctionName: 5011 return Context->DeclarationNames.getCXXConversionFunctionName( 5012 Context->getCanonicalType(readType(F, Record, Idx))); 5013 5014 case DeclarationName::CXXOperatorName: 5015 return Context->DeclarationNames.getCXXOperatorName( 5016 (OverloadedOperatorKind)Record[Idx++]); 5017 5018 case DeclarationName::CXXLiteralOperatorName: 5019 return Context->DeclarationNames.getCXXLiteralOperatorName( 5020 GetIdentifierInfo(F, Record, Idx)); 5021 5022 case DeclarationName::CXXUsingDirective: 5023 return DeclarationName::getUsingDirectiveName(); 5024 } 5025 5026 // Required to silence GCC warning 5027 return DeclarationName(); 5028} 5029 5030void ASTReader::ReadDeclarationNameLoc(Module &F, 5031 DeclarationNameLoc &DNLoc, 5032 DeclarationName Name, 5033 const RecordData &Record, unsigned &Idx) { 5034 switch (Name.getNameKind()) { 5035 case DeclarationName::CXXConstructorName: 5036 case DeclarationName::CXXDestructorName: 5037 case DeclarationName::CXXConversionFunctionName: 5038 DNLoc.NamedType.TInfo = GetTypeSourceInfo(F, Record, Idx); 5039 break; 5040 5041 case DeclarationName::CXXOperatorName: 5042 DNLoc.CXXOperatorName.BeginOpNameLoc 5043 = ReadSourceLocation(F, Record, Idx).getRawEncoding(); 5044 DNLoc.CXXOperatorName.EndOpNameLoc 5045 = ReadSourceLocation(F, Record, Idx).getRawEncoding(); 5046 break; 5047 5048 case DeclarationName::CXXLiteralOperatorName: 5049 DNLoc.CXXLiteralOperatorName.OpNameLoc 5050 = ReadSourceLocation(F, Record, Idx).getRawEncoding(); 5051 break; 5052 5053 case DeclarationName::Identifier: 5054 case DeclarationName::ObjCZeroArgSelector: 5055 case DeclarationName::ObjCOneArgSelector: 5056 case DeclarationName::ObjCMultiArgSelector: 5057 case DeclarationName::CXXUsingDirective: 5058 break; 5059 } 5060} 5061 5062void ASTReader::ReadDeclarationNameInfo(Module &F, 5063 DeclarationNameInfo &NameInfo, 5064 const RecordData &Record, unsigned &Idx) { 5065 NameInfo.setName(ReadDeclarationName(F, Record, Idx)); 5066 NameInfo.setLoc(ReadSourceLocation(F, Record, Idx)); 5067 DeclarationNameLoc DNLoc; 5068 ReadDeclarationNameLoc(F, DNLoc, NameInfo.getName(), Record, Idx); 5069 NameInfo.setInfo(DNLoc); 5070} 5071 5072void ASTReader::ReadQualifierInfo(Module &F, QualifierInfo &Info, 5073 const RecordData &Record, unsigned &Idx) { 5074 Info.QualifierLoc = ReadNestedNameSpecifierLoc(F, Record, Idx); 5075 unsigned NumTPLists = Record[Idx++]; 5076 Info.NumTemplParamLists = NumTPLists; 5077 if (NumTPLists) { 5078 Info.TemplParamLists = new (*Context) TemplateParameterList*[NumTPLists]; 5079 for (unsigned i=0; i != NumTPLists; ++i) 5080 Info.TemplParamLists[i] = ReadTemplateParameterList(F, Record, Idx); 5081 } 5082} 5083 5084TemplateName 5085ASTReader::ReadTemplateName(Module &F, const RecordData &Record, 5086 unsigned &Idx) { 5087 TemplateName::NameKind Kind = (TemplateName::NameKind)Record[Idx++]; 5088 switch (Kind) { 5089 case TemplateName::Template: 5090 return TemplateName(ReadDeclAs<TemplateDecl>(F, Record, Idx)); 5091 5092 case TemplateName::OverloadedTemplate: { 5093 unsigned size = Record[Idx++]; 5094 UnresolvedSet<8> Decls; 5095 while (size--) 5096 Decls.addDecl(ReadDeclAs<NamedDecl>(F, Record, Idx)); 5097 5098 return Context->getOverloadedTemplateName(Decls.begin(), Decls.end()); 5099 } 5100 5101 case TemplateName::QualifiedTemplate: { 5102 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(F, Record, Idx); 5103 bool hasTemplKeyword = Record[Idx++]; 5104 TemplateDecl *Template = ReadDeclAs<TemplateDecl>(F, Record, Idx); 5105 return Context->getQualifiedTemplateName(NNS, hasTemplKeyword, Template); 5106 } 5107 5108 case TemplateName::DependentTemplate: { 5109 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(F, Record, Idx); 5110 if (Record[Idx++]) // isIdentifier 5111 return Context->getDependentTemplateName(NNS, 5112 GetIdentifierInfo(F, Record, 5113 Idx)); 5114 return Context->getDependentTemplateName(NNS, 5115 (OverloadedOperatorKind)Record[Idx++]); 5116 } 5117 5118 case TemplateName::SubstTemplateTemplateParm: { 5119 TemplateTemplateParmDecl *param 5120 = ReadDeclAs<TemplateTemplateParmDecl>(F, Record, Idx); 5121 if (!param) return TemplateName(); 5122 TemplateName replacement = ReadTemplateName(F, Record, Idx); 5123 return Context->getSubstTemplateTemplateParm(param, replacement); 5124 } 5125 5126 case TemplateName::SubstTemplateTemplateParmPack: { 5127 TemplateTemplateParmDecl *Param 5128 = ReadDeclAs<TemplateTemplateParmDecl>(F, Record, Idx); 5129 if (!Param) 5130 return TemplateName(); 5131 5132 TemplateArgument ArgPack = ReadTemplateArgument(F, Record, Idx); 5133 if (ArgPack.getKind() != TemplateArgument::Pack) 5134 return TemplateName(); 5135 5136 return Context->getSubstTemplateTemplateParmPack(Param, ArgPack); 5137 } 5138 } 5139 5140 assert(0 && "Unhandled template name kind!"); 5141 return TemplateName(); 5142} 5143 5144TemplateArgument 5145ASTReader::ReadTemplateArgument(Module &F, 5146 const RecordData &Record, unsigned &Idx) { 5147 TemplateArgument::ArgKind Kind = (TemplateArgument::ArgKind)Record[Idx++]; 5148 switch (Kind) { 5149 case TemplateArgument::Null: 5150 return TemplateArgument(); 5151 case TemplateArgument::Type: 5152 return TemplateArgument(readType(F, Record, Idx)); 5153 case TemplateArgument::Declaration: 5154 return TemplateArgument(ReadDecl(F, Record, Idx)); 5155 case TemplateArgument::Integral: { 5156 llvm::APSInt Value = ReadAPSInt(Record, Idx); 5157 QualType T = readType(F, Record, Idx); 5158 return TemplateArgument(Value, T); 5159 } 5160 case TemplateArgument::Template: 5161 return TemplateArgument(ReadTemplateName(F, Record, Idx)); 5162 case TemplateArgument::TemplateExpansion: { 5163 TemplateName Name = ReadTemplateName(F, Record, Idx); 5164 llvm::Optional<unsigned> NumTemplateExpansions; 5165 if (unsigned NumExpansions = Record[Idx++]) 5166 NumTemplateExpansions = NumExpansions - 1; 5167 return TemplateArgument(Name, NumTemplateExpansions); 5168 } 5169 case TemplateArgument::Expression: 5170 return TemplateArgument(ReadExpr(F)); 5171 case TemplateArgument::Pack: { 5172 unsigned NumArgs = Record[Idx++]; 5173 TemplateArgument *Args = new (*Context) TemplateArgument[NumArgs]; 5174 for (unsigned I = 0; I != NumArgs; ++I) 5175 Args[I] = ReadTemplateArgument(F, Record, Idx); 5176 return TemplateArgument(Args, NumArgs); 5177 } 5178 } 5179 5180 assert(0 && "Unhandled template argument kind!"); 5181 return TemplateArgument(); 5182} 5183 5184TemplateParameterList * 5185ASTReader::ReadTemplateParameterList(Module &F, 5186 const RecordData &Record, unsigned &Idx) { 5187 SourceLocation TemplateLoc = ReadSourceLocation(F, Record, Idx); 5188 SourceLocation LAngleLoc = ReadSourceLocation(F, Record, Idx); 5189 SourceLocation RAngleLoc = ReadSourceLocation(F, Record, Idx); 5190 5191 unsigned NumParams = Record[Idx++]; 5192 SmallVector<NamedDecl *, 16> Params; 5193 Params.reserve(NumParams); 5194 while (NumParams--) 5195 Params.push_back(ReadDeclAs<NamedDecl>(F, Record, Idx)); 5196 5197 TemplateParameterList* TemplateParams = 5198 TemplateParameterList::Create(*Context, TemplateLoc, LAngleLoc, 5199 Params.data(), Params.size(), RAngleLoc); 5200 return TemplateParams; 5201} 5202 5203void 5204ASTReader:: 5205ReadTemplateArgumentList(SmallVector<TemplateArgument, 8> &TemplArgs, 5206 Module &F, const RecordData &Record, 5207 unsigned &Idx) { 5208 unsigned NumTemplateArgs = Record[Idx++]; 5209 TemplArgs.reserve(NumTemplateArgs); 5210 while (NumTemplateArgs--) 5211 TemplArgs.push_back(ReadTemplateArgument(F, Record, Idx)); 5212} 5213 5214/// \brief Read a UnresolvedSet structure. 5215void ASTReader::ReadUnresolvedSet(Module &F, UnresolvedSetImpl &Set, 5216 const RecordData &Record, unsigned &Idx) { 5217 unsigned NumDecls = Record[Idx++]; 5218 while (NumDecls--) { 5219 NamedDecl *D = ReadDeclAs<NamedDecl>(F, Record, Idx); 5220 AccessSpecifier AS = (AccessSpecifier)Record[Idx++]; 5221 Set.addDecl(D, AS); 5222 } 5223} 5224 5225CXXBaseSpecifier 5226ASTReader::ReadCXXBaseSpecifier(Module &F, 5227 const RecordData &Record, unsigned &Idx) { 5228 bool isVirtual = static_cast<bool>(Record[Idx++]); 5229 bool isBaseOfClass = static_cast<bool>(Record[Idx++]); 5230 AccessSpecifier AS = static_cast<AccessSpecifier>(Record[Idx++]); 5231 bool inheritConstructors = static_cast<bool>(Record[Idx++]); 5232 TypeSourceInfo *TInfo = GetTypeSourceInfo(F, Record, Idx); 5233 SourceRange Range = ReadSourceRange(F, Record, Idx); 5234 SourceLocation EllipsisLoc = ReadSourceLocation(F, Record, Idx); 5235 CXXBaseSpecifier Result(Range, isVirtual, isBaseOfClass, AS, TInfo, 5236 EllipsisLoc); 5237 Result.setInheritConstructors(inheritConstructors); 5238 return Result; 5239} 5240 5241std::pair<CXXCtorInitializer **, unsigned> 5242ASTReader::ReadCXXCtorInitializers(Module &F, const RecordData &Record, 5243 unsigned &Idx) { 5244 CXXCtorInitializer **CtorInitializers = 0; 5245 unsigned NumInitializers = Record[Idx++]; 5246 if (NumInitializers) { 5247 ASTContext &C = *getContext(); 5248 5249 CtorInitializers 5250 = new (C) CXXCtorInitializer*[NumInitializers]; 5251 for (unsigned i=0; i != NumInitializers; ++i) { 5252 TypeSourceInfo *BaseClassInfo = 0; 5253 bool IsBaseVirtual = false; 5254 FieldDecl *Member = 0; 5255 IndirectFieldDecl *IndirectMember = 0; 5256 CXXConstructorDecl *Target = 0; 5257 5258 CtorInitializerType Type = (CtorInitializerType)Record[Idx++]; 5259 switch (Type) { 5260 case CTOR_INITIALIZER_BASE: 5261 BaseClassInfo = GetTypeSourceInfo(F, Record, Idx); 5262 IsBaseVirtual = Record[Idx++]; 5263 break; 5264 5265 case CTOR_INITIALIZER_DELEGATING: 5266 Target = ReadDeclAs<CXXConstructorDecl>(F, Record, Idx); 5267 break; 5268 5269 case CTOR_INITIALIZER_MEMBER: 5270 Member = ReadDeclAs<FieldDecl>(F, Record, Idx); 5271 break; 5272 5273 case CTOR_INITIALIZER_INDIRECT_MEMBER: 5274 IndirectMember = ReadDeclAs<IndirectFieldDecl>(F, Record, Idx); 5275 break; 5276 } 5277 5278 SourceLocation MemberOrEllipsisLoc = ReadSourceLocation(F, Record, Idx); 5279 Expr *Init = ReadExpr(F); 5280 SourceLocation LParenLoc = ReadSourceLocation(F, Record, Idx); 5281 SourceLocation RParenLoc = ReadSourceLocation(F, Record, Idx); 5282 bool IsWritten = Record[Idx++]; 5283 unsigned SourceOrderOrNumArrayIndices; 5284 SmallVector<VarDecl *, 8> Indices; 5285 if (IsWritten) { 5286 SourceOrderOrNumArrayIndices = Record[Idx++]; 5287 } else { 5288 SourceOrderOrNumArrayIndices = Record[Idx++]; 5289 Indices.reserve(SourceOrderOrNumArrayIndices); 5290 for (unsigned i=0; i != SourceOrderOrNumArrayIndices; ++i) 5291 Indices.push_back(ReadDeclAs<VarDecl>(F, Record, Idx)); 5292 } 5293 5294 CXXCtorInitializer *BOMInit; 5295 if (Type == CTOR_INITIALIZER_BASE) { 5296 BOMInit = new (C) CXXCtorInitializer(C, BaseClassInfo, IsBaseVirtual, 5297 LParenLoc, Init, RParenLoc, 5298 MemberOrEllipsisLoc); 5299 } else if (Type == CTOR_INITIALIZER_DELEGATING) { 5300 BOMInit = new (C) CXXCtorInitializer(C, MemberOrEllipsisLoc, LParenLoc, 5301 Target, Init, RParenLoc); 5302 } else if (IsWritten) { 5303 if (Member) 5304 BOMInit = new (C) CXXCtorInitializer(C, Member, MemberOrEllipsisLoc, 5305 LParenLoc, Init, RParenLoc); 5306 else 5307 BOMInit = new (C) CXXCtorInitializer(C, IndirectMember, 5308 MemberOrEllipsisLoc, LParenLoc, 5309 Init, RParenLoc); 5310 } else { 5311 BOMInit = CXXCtorInitializer::Create(C, Member, MemberOrEllipsisLoc, 5312 LParenLoc, Init, RParenLoc, 5313 Indices.data(), Indices.size()); 5314 } 5315 5316 if (IsWritten) 5317 BOMInit->setSourceOrder(SourceOrderOrNumArrayIndices); 5318 CtorInitializers[i] = BOMInit; 5319 } 5320 } 5321 5322 return std::make_pair(CtorInitializers, NumInitializers); 5323} 5324 5325NestedNameSpecifier * 5326ASTReader::ReadNestedNameSpecifier(Module &F, 5327 const RecordData &Record, unsigned &Idx) { 5328 unsigned N = Record[Idx++]; 5329 NestedNameSpecifier *NNS = 0, *Prev = 0; 5330 for (unsigned I = 0; I != N; ++I) { 5331 NestedNameSpecifier::SpecifierKind Kind 5332 = (NestedNameSpecifier::SpecifierKind)Record[Idx++]; 5333 switch (Kind) { 5334 case NestedNameSpecifier::Identifier: { 5335 IdentifierInfo *II = GetIdentifierInfo(F, Record, Idx); 5336 NNS = NestedNameSpecifier::Create(*Context, Prev, II); 5337 break; 5338 } 5339 5340 case NestedNameSpecifier::Namespace: { 5341 NamespaceDecl *NS = ReadDeclAs<NamespaceDecl>(F, Record, Idx); 5342 NNS = NestedNameSpecifier::Create(*Context, Prev, NS); 5343 break; 5344 } 5345 5346 case NestedNameSpecifier::NamespaceAlias: { 5347 NamespaceAliasDecl *Alias =ReadDeclAs<NamespaceAliasDecl>(F, Record, Idx); 5348 NNS = NestedNameSpecifier::Create(*Context, Prev, Alias); 5349 break; 5350 } 5351 5352 case NestedNameSpecifier::TypeSpec: 5353 case NestedNameSpecifier::TypeSpecWithTemplate: { 5354 const Type *T = readType(F, Record, Idx).getTypePtrOrNull(); 5355 if (!T) 5356 return 0; 5357 5358 bool Template = Record[Idx++]; 5359 NNS = NestedNameSpecifier::Create(*Context, Prev, Template, T); 5360 break; 5361 } 5362 5363 case NestedNameSpecifier::Global: { 5364 NNS = NestedNameSpecifier::GlobalSpecifier(*Context); 5365 // No associated value, and there can't be a prefix. 5366 break; 5367 } 5368 } 5369 Prev = NNS; 5370 } 5371 return NNS; 5372} 5373 5374NestedNameSpecifierLoc 5375ASTReader::ReadNestedNameSpecifierLoc(Module &F, const RecordData &Record, 5376 unsigned &Idx) { 5377 unsigned N = Record[Idx++]; 5378 NestedNameSpecifierLocBuilder Builder; 5379 for (unsigned I = 0; I != N; ++I) { 5380 NestedNameSpecifier::SpecifierKind Kind 5381 = (NestedNameSpecifier::SpecifierKind)Record[Idx++]; 5382 switch (Kind) { 5383 case NestedNameSpecifier::Identifier: { 5384 IdentifierInfo *II = GetIdentifierInfo(F, Record, Idx); 5385 SourceRange Range = ReadSourceRange(F, Record, Idx); 5386 Builder.Extend(*Context, II, Range.getBegin(), Range.getEnd()); 5387 break; 5388 } 5389 5390 case NestedNameSpecifier::Namespace: { 5391 NamespaceDecl *NS = ReadDeclAs<NamespaceDecl>(F, Record, Idx); 5392 SourceRange Range = ReadSourceRange(F, Record, Idx); 5393 Builder.Extend(*Context, NS, Range.getBegin(), Range.getEnd()); 5394 break; 5395 } 5396 5397 case NestedNameSpecifier::NamespaceAlias: { 5398 NamespaceAliasDecl *Alias =ReadDeclAs<NamespaceAliasDecl>(F, Record, Idx); 5399 SourceRange Range = ReadSourceRange(F, Record, Idx); 5400 Builder.Extend(*Context, Alias, Range.getBegin(), Range.getEnd()); 5401 break; 5402 } 5403 5404 case NestedNameSpecifier::TypeSpec: 5405 case NestedNameSpecifier::TypeSpecWithTemplate: { 5406 bool Template = Record[Idx++]; 5407 TypeSourceInfo *T = GetTypeSourceInfo(F, Record, Idx); 5408 if (!T) 5409 return NestedNameSpecifierLoc(); 5410 SourceLocation ColonColonLoc = ReadSourceLocation(F, Record, Idx); 5411 5412 // FIXME: 'template' keyword location not saved anywhere, so we fake it. 5413 Builder.Extend(*Context, 5414 Template? T->getTypeLoc().getBeginLoc() : SourceLocation(), 5415 T->getTypeLoc(), ColonColonLoc); 5416 break; 5417 } 5418 5419 case NestedNameSpecifier::Global: { 5420 SourceLocation ColonColonLoc = ReadSourceLocation(F, Record, Idx); 5421 Builder.MakeGlobal(*Context, ColonColonLoc); 5422 break; 5423 } 5424 } 5425 } 5426 5427 return Builder.getWithLocInContext(*Context); 5428} 5429 5430SourceRange 5431ASTReader::ReadSourceRange(Module &F, const RecordData &Record, 5432 unsigned &Idx) { 5433 SourceLocation beg = ReadSourceLocation(F, Record, Idx); 5434 SourceLocation end = ReadSourceLocation(F, Record, Idx); 5435 return SourceRange(beg, end); 5436} 5437 5438/// \brief Read an integral value 5439llvm::APInt ASTReader::ReadAPInt(const RecordData &Record, unsigned &Idx) { 5440 unsigned BitWidth = Record[Idx++]; 5441 unsigned NumWords = llvm::APInt::getNumWords(BitWidth); 5442 llvm::APInt Result(BitWidth, NumWords, &Record[Idx]); 5443 Idx += NumWords; 5444 return Result; 5445} 5446 5447/// \brief Read a signed integral value 5448llvm::APSInt ASTReader::ReadAPSInt(const RecordData &Record, unsigned &Idx) { 5449 bool isUnsigned = Record[Idx++]; 5450 return llvm::APSInt(ReadAPInt(Record, Idx), isUnsigned); 5451} 5452 5453/// \brief Read a floating-point value 5454llvm::APFloat ASTReader::ReadAPFloat(const RecordData &Record, unsigned &Idx) { 5455 return llvm::APFloat(ReadAPInt(Record, Idx)); 5456} 5457 5458// \brief Read a string 5459std::string ASTReader::ReadString(const RecordData &Record, unsigned &Idx) { 5460 unsigned Len = Record[Idx++]; 5461 std::string Result(Record.data() + Idx, Record.data() + Idx + Len); 5462 Idx += Len; 5463 return Result; 5464} 5465 5466VersionTuple ASTReader::ReadVersionTuple(const RecordData &Record, 5467 unsigned &Idx) { 5468 unsigned Major = Record[Idx++]; 5469 unsigned Minor = Record[Idx++]; 5470 unsigned Subminor = Record[Idx++]; 5471 if (Minor == 0) 5472 return VersionTuple(Major); 5473 if (Subminor == 0) 5474 return VersionTuple(Major, Minor - 1); 5475 return VersionTuple(Major, Minor - 1, Subminor - 1); 5476} 5477 5478CXXTemporary *ASTReader::ReadCXXTemporary(Module &F, 5479 const RecordData &Record, 5480 unsigned &Idx) { 5481 CXXDestructorDecl *Decl = ReadDeclAs<CXXDestructorDecl>(F, Record, Idx); 5482 return CXXTemporary::Create(*Context, Decl); 5483} 5484 5485DiagnosticBuilder ASTReader::Diag(unsigned DiagID) { 5486 return Diag(SourceLocation(), DiagID); 5487} 5488 5489DiagnosticBuilder ASTReader::Diag(SourceLocation Loc, unsigned DiagID) { 5490 return Diags.Report(Loc, DiagID); 5491} 5492 5493/// \brief Retrieve the identifier table associated with the 5494/// preprocessor. 5495IdentifierTable &ASTReader::getIdentifierTable() { 5496 assert(PP && "Forgot to set Preprocessor ?"); 5497 return PP->getIdentifierTable(); 5498} 5499 5500/// \brief Record that the given ID maps to the given switch-case 5501/// statement. 5502void ASTReader::RecordSwitchCaseID(SwitchCase *SC, unsigned ID) { 5503 assert(SwitchCaseStmts[ID] == 0 && "Already have a SwitchCase with this ID"); 5504 SwitchCaseStmts[ID] = SC; 5505} 5506 5507/// \brief Retrieve the switch-case statement with the given ID. 5508SwitchCase *ASTReader::getSwitchCaseWithID(unsigned ID) { 5509 assert(SwitchCaseStmts[ID] != 0 && "No SwitchCase with this ID"); 5510 return SwitchCaseStmts[ID]; 5511} 5512 5513void ASTReader::ClearSwitchCaseIDs() { 5514 SwitchCaseStmts.clear(); 5515} 5516 5517void ASTReader::FinishedDeserializing() { 5518 assert(NumCurrentElementsDeserializing && 5519 "FinishedDeserializing not paired with StartedDeserializing"); 5520 if (NumCurrentElementsDeserializing == 1) { 5521 // If any identifiers with corresponding top-level declarations have 5522 // been loaded, load those declarations now. 5523 while (!PendingIdentifierInfos.empty()) { 5524 SetGloballyVisibleDecls(PendingIdentifierInfos.front().II, 5525 PendingIdentifierInfos.front().DeclIDs, true); 5526 PendingIdentifierInfos.pop_front(); 5527 } 5528 5529 // Ready to load previous declarations of Decls that were delayed. 5530 while (!PendingPreviousDecls.empty()) { 5531 loadAndAttachPreviousDecl(PendingPreviousDecls.front().first, 5532 PendingPreviousDecls.front().second); 5533 PendingPreviousDecls.pop_front(); 5534 } 5535 5536 // We are not in recursive loading, so it's safe to pass the "interesting" 5537 // decls to the consumer. 5538 if (Consumer) 5539 PassInterestingDeclsToConsumer(); 5540 5541 assert(PendingForwardRefs.size() == 0 && 5542 "Some forward refs did not get linked to the definition!"); 5543 } 5544 --NumCurrentElementsDeserializing; 5545} 5546 5547ASTReader::ASTReader(Preprocessor &PP, ASTContext *Context, 5548 StringRef isysroot, bool DisableValidation, 5549 bool DisableStatCache) 5550 : Listener(new PCHValidator(PP, *this)), DeserializationListener(0), 5551 SourceMgr(PP.getSourceManager()), FileMgr(PP.getFileManager()), 5552 Diags(PP.getDiagnostics()), SemaObj(0), PP(&PP), Context(Context), 5553 Consumer(0), ModuleMgr(FileMgr.getFileSystemOptions()), 5554 RelocatablePCH(false), isysroot(isysroot), 5555 DisableValidation(DisableValidation), 5556 DisableStatCache(DisableStatCache), NumStatHits(0), NumStatMisses(0), 5557 NumSLocEntriesRead(0), TotalNumSLocEntries(0), 5558 NumStatementsRead(0), TotalNumStatements(0), NumMacrosRead(0), 5559 TotalNumMacros(0), NumSelectorsRead(0), NumMethodPoolEntriesRead(0), 5560 NumMethodPoolMisses(0), TotalNumMethodPoolEntries(0), 5561 NumLexicalDeclContextsRead(0), TotalLexicalDeclContexts(0), 5562 NumVisibleDeclContextsRead(0), TotalVisibleDeclContexts(0), 5563 TotalModulesSizeInBits(0), NumCurrentElementsDeserializing(0), 5564 NumCXXBaseSpecifiersLoaded(0) 5565{ 5566 SourceMgr.setExternalSLocEntrySource(this); 5567} 5568 5569ASTReader::ASTReader(SourceManager &SourceMgr, FileManager &FileMgr, 5570 Diagnostic &Diags, StringRef isysroot, 5571 bool DisableValidation, bool DisableStatCache) 5572 : DeserializationListener(0), SourceMgr(SourceMgr), FileMgr(FileMgr), 5573 Diags(Diags), SemaObj(0), PP(0), Context(0), 5574 Consumer(0), ModuleMgr(FileMgr.getFileSystemOptions()), 5575 RelocatablePCH(false), isysroot(isysroot), 5576 DisableValidation(DisableValidation), DisableStatCache(DisableStatCache), 5577 NumStatHits(0), NumStatMisses(0), NumSLocEntriesRead(0), 5578 TotalNumSLocEntries(0), NumStatementsRead(0), 5579 TotalNumStatements(0), NumMacrosRead(0), TotalNumMacros(0), 5580 NumSelectorsRead(0), NumMethodPoolEntriesRead(0), NumMethodPoolMisses(0), 5581 TotalNumMethodPoolEntries(0), NumLexicalDeclContextsRead(0), 5582 TotalLexicalDeclContexts(0), NumVisibleDeclContextsRead(0), 5583 TotalVisibleDeclContexts(0), TotalModulesSizeInBits(0), 5584 NumCurrentElementsDeserializing(0), NumCXXBaseSpecifiersLoaded(0) 5585{ 5586 SourceMgr.setExternalSLocEntrySource(this); 5587} 5588 5589ASTReader::~ASTReader() { 5590 // Delete all visible decl lookup tables 5591 for (DeclContextOffsetsMap::iterator I = DeclContextOffsets.begin(), 5592 E = DeclContextOffsets.end(); 5593 I != E; ++I) { 5594 for (DeclContextInfos::iterator J = I->second.begin(), F = I->second.end(); 5595 J != F; ++J) { 5596 if (J->NameLookupTableData) 5597 delete static_cast<ASTDeclContextNameLookupTable*>( 5598 J->NameLookupTableData); 5599 } 5600 } 5601 for (DeclContextVisibleUpdatesPending::iterator 5602 I = PendingVisibleUpdates.begin(), 5603 E = PendingVisibleUpdates.end(); 5604 I != E; ++I) { 5605 for (DeclContextVisibleUpdates::iterator J = I->second.begin(), 5606 F = I->second.end(); 5607 J != F; ++J) 5608 delete static_cast<ASTDeclContextNameLookupTable*>(J->first); 5609 } 5610} 5611 5612Module::Module(ModuleKind Kind) 5613 : Kind(Kind), SizeInBits(0), LocalNumSLocEntries(0), SLocEntryBaseID(0), 5614 SLocEntryBaseOffset(0), SLocEntryOffsets(0), 5615 SLocFileOffsets(0), LocalNumIdentifiers(0), 5616 IdentifierOffsets(0), BaseIdentifierID(0), IdentifierTableData(0), 5617 IdentifierLookupTable(0), BasePreprocessedEntityID(0), 5618 LocalNumMacroDefinitions(0), MacroDefinitionOffsets(0), 5619 BaseMacroDefinitionID(0), LocalNumHeaderFileInfos(0), 5620 HeaderFileInfoTableData(0), HeaderFileInfoTable(0), 5621 HeaderFileFrameworkStrings(0), 5622 LocalNumSelectors(0), SelectorOffsets(0), BaseSelectorID(0), 5623 SelectorLookupTableData(0), SelectorLookupTable(0), LocalNumDecls(0), 5624 DeclOffsets(0), BaseDeclID(0), 5625 LocalNumCXXBaseSpecifiers(0), CXXBaseSpecifiersOffsets(0), 5626 LocalNumTypes(0), TypeOffsets(0), BaseTypeIndex(0), StatCache(0), 5627 NumPreallocatedPreprocessingEntities(0) 5628{} 5629 5630Module::~Module() { 5631 delete static_cast<ASTIdentifierLookupTable *>(IdentifierLookupTable); 5632 delete static_cast<HeaderFileInfoLookupTable *>(HeaderFileInfoTable); 5633 delete static_cast<ASTSelectorLookupTable *>(SelectorLookupTable); 5634} 5635 5636template<typename Key, typename Offset, unsigned InitialCapacity> 5637static void 5638dumpLocalRemap(StringRef Name, 5639 const ContinuousRangeMap<Key, Offset, InitialCapacity> &Map) { 5640 if (Map.begin() == Map.end()) 5641 return; 5642 5643 typedef ContinuousRangeMap<Key, Offset, InitialCapacity> MapType; 5644 llvm::errs() << " " << Name << ":\n"; 5645 for (typename MapType::const_iterator I = Map.begin(), IEnd = Map.end(); 5646 I != IEnd; ++I) { 5647 llvm::errs() << " " << I->first << " -> " << I->second 5648 << "\n"; 5649 } 5650} 5651 5652void Module::dump() { 5653 llvm::errs() << "\nModule: " << FileName << "\n"; 5654 if (!Imports.empty()) { 5655 llvm::errs() << " Imports: "; 5656 for (unsigned I = 0, N = Imports.size(); I != N; ++I) { 5657 if (I) 5658 llvm::errs() << ", "; 5659 llvm::errs() << Imports[I]->FileName; 5660 } 5661 llvm::errs() << "\n"; 5662 } 5663 5664 // Remapping tables. 5665 llvm::errs() << " Base source location offset: " << SLocEntryBaseOffset 5666 << '\n'; 5667 dumpLocalRemap("Source location offset local -> global map", SLocRemap); 5668 5669 llvm::errs() << " Base identifier ID: " << BaseIdentifierID << '\n' 5670 << " Number of identifiers: " << LocalNumIdentifiers << '\n'; 5671 dumpLocalRemap("Identifier ID local -> global map", IdentifierRemap); 5672 5673 llvm::errs() << " Base selector ID: " << BaseSelectorID << '\n' 5674 << " Number of selectors: " << LocalNumSelectors << '\n'; 5675 dumpLocalRemap("Selector ID local -> global map", SelectorRemap); 5676 5677 llvm::errs() << " Base preprocessed entity ID: " << BasePreprocessedEntityID 5678 << '\n' 5679 << " Number of preprocessed entities: " 5680 << NumPreallocatedPreprocessingEntities << '\n'; 5681 dumpLocalRemap("Preprocessed entity ID local -> global map", 5682 PreprocessedEntityRemap); 5683 5684 llvm::errs() << " Base macro definition ID: " << BaseMacroDefinitionID 5685 << '\n' 5686 << " Number of macro definitions: " << LocalNumMacroDefinitions 5687 << '\n'; 5688 dumpLocalRemap("Macro definition ID local -> global map", 5689 MacroDefinitionRemap); 5690 5691 llvm::errs() << " Base type index: " << BaseTypeIndex << '\n' 5692 << " Number of types: " << LocalNumTypes << '\n'; 5693 dumpLocalRemap("Type index local -> global map", TypeRemap); 5694 5695 llvm::errs() << " Base decl ID: " << BaseDeclID << '\n' 5696 << " Number of decls: " << LocalNumDecls << '\n'; 5697 dumpLocalRemap("Decl ID local -> global map", DeclRemap); 5698} 5699 5700Module *ModuleManager::lookup(StringRef Name) { 5701 const FileEntry *Entry = FileMgr.getFile(Name); 5702 return Modules[Entry]; 5703} 5704 5705llvm::MemoryBuffer *ModuleManager::lookupBuffer(StringRef Name) { 5706 const FileEntry *Entry = FileMgr.getFile(Name); 5707 return InMemoryBuffers[Entry]; 5708} 5709 5710/// \brief Creates a new module and adds it to the list of known modules 5711Module &ModuleManager::addModule(StringRef FileName, ModuleKind Type) { 5712 Module *Prev = !size() ? 0 : &getLastModule(); 5713 Module *Current = new Module(Type); 5714 5715 Current->FileName = FileName.str(); 5716 5717 Chain.push_back(Current); 5718 const FileEntry *Entry = FileMgr.getFile(FileName); 5719 Modules[Entry] = Current; 5720 5721 if (Prev) { 5722 Current->ImportedBy.insert(Prev); 5723 Prev->Imports.insert(Current); 5724 } 5725 5726 return *Current; 5727} 5728 5729void ModuleManager::addInMemoryBuffer(StringRef FileName, 5730 llvm::MemoryBuffer *Buffer) { 5731 5732 const FileEntry *Entry = FileMgr.getVirtualFile(FileName, 5733 Buffer->getBufferSize(), 0); 5734 InMemoryBuffers[Entry] = Buffer; 5735} 5736/// \brief Exports the list of loaded modules with their corresponding names 5737void ModuleManager::exportLookup(SmallVector<ModuleOffset, 16> &Target) { 5738 Target.reserve(size()); 5739 for (ModuleConstIterator I = Chain.begin(), E = Chain.end(); 5740 I != E; ++I) { 5741 Target.push_back(ModuleOffset((*I)->SLocEntryBaseOffset, 5742 (*I)->FileName)); 5743 } 5744 std::sort(Target.begin(), Target.end()); 5745} 5746 5747ModuleManager::ModuleManager(const FileSystemOptions &FSO) : FileMgr(FSO) { } 5748 5749ModuleManager::~ModuleManager() { 5750 for (unsigned i = 0, e = Chain.size(); i != e; ++i) 5751 delete Chain[e - i - 1]; 5752} 5753