ASTReader.cpp revision e92b8a1dbba150e213c4980710fcb59ec5c5c570
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 1416PreprocessedEntity *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 0; 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 0; 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 0; 1465 1466 IdentifierInfo *II = getLocalIdentifier(F, Record[0]); 1467 if (II == 0) { 1468 Error("macro must have a name in AST file"); 1469 return 0; 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 0; 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)) 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, 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)) 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, 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)) 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, 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 // FIXME: Local-to-global mapping 1647 return LocalID; 1648} 1649 1650namespace { 1651 /// \brief Trait class used to search the on-disk hash table containing all of 1652 /// the header search information. 1653 /// 1654 /// The on-disk hash table contains a mapping from each header path to 1655 /// information about that header (how many times it has been included, its 1656 /// controlling macro, etc.). Note that we actually hash based on the 1657 /// filename, and support "deep" comparisons of file names based on current 1658 /// inode numbers, so that the search can cope with non-normalized path names 1659 /// and symlinks. 1660 class HeaderFileInfoTrait { 1661 ASTReader &Reader; 1662 Module &M; 1663 HeaderSearch *HS; 1664 const char *FrameworkStrings; 1665 const char *SearchPath; 1666 struct stat SearchPathStatBuf; 1667 llvm::Optional<int> SearchPathStatResult; 1668 1669 int StatSimpleCache(const char *Path, struct stat *StatBuf) { 1670 if (Path == SearchPath) { 1671 if (!SearchPathStatResult) 1672 SearchPathStatResult = stat(Path, &SearchPathStatBuf); 1673 1674 *StatBuf = SearchPathStatBuf; 1675 return *SearchPathStatResult; 1676 } 1677 1678 return stat(Path, StatBuf); 1679 } 1680 1681 public: 1682 typedef const char *external_key_type; 1683 typedef const char *internal_key_type; 1684 1685 typedef HeaderFileInfo data_type; 1686 1687 HeaderFileInfoTrait(ASTReader &Reader, Module &M, HeaderSearch *HS, 1688 const char *FrameworkStrings, 1689 const char *SearchPath = 0) 1690 : Reader(Reader), M(M), HS(HS), FrameworkStrings(FrameworkStrings), 1691 SearchPath(SearchPath) { } 1692 1693 static unsigned ComputeHash(const char *path) { 1694 return llvm::HashString(llvm::sys::path::filename(path)); 1695 } 1696 1697 static internal_key_type GetInternalKey(const char *path) { return path; } 1698 1699 bool EqualKey(internal_key_type a, internal_key_type b) { 1700 if (strcmp(a, b) == 0) 1701 return true; 1702 1703 if (llvm::sys::path::filename(a) != llvm::sys::path::filename(b)) 1704 return false; 1705 1706 // The file names match, but the path names don't. stat() the files to 1707 // see if they are the same. 1708 struct stat StatBufA, StatBufB; 1709 if (StatSimpleCache(a, &StatBufA) || StatSimpleCache(b, &StatBufB)) 1710 return false; 1711 1712 return StatBufA.st_ino == StatBufB.st_ino; 1713 } 1714 1715 static std::pair<unsigned, unsigned> 1716 ReadKeyDataLength(const unsigned char*& d) { 1717 unsigned KeyLen = (unsigned) clang::io::ReadUnalignedLE16(d); 1718 unsigned DataLen = (unsigned) *d++; 1719 return std::make_pair(KeyLen + 1, DataLen); 1720 } 1721 1722 static internal_key_type ReadKey(const unsigned char *d, unsigned) { 1723 return (const char *)d; 1724 } 1725 1726 data_type ReadData(const internal_key_type, const unsigned char *d, 1727 unsigned DataLen) { 1728 const unsigned char *End = d + DataLen; 1729 using namespace clang::io; 1730 HeaderFileInfo HFI; 1731 unsigned Flags = *d++; 1732 HFI.isImport = (Flags >> 5) & 0x01; 1733 HFI.isPragmaOnce = (Flags >> 4) & 0x01; 1734 HFI.DirInfo = (Flags >> 2) & 0x03; 1735 HFI.Resolved = (Flags >> 1) & 0x01; 1736 HFI.IndexHeaderMapHeader = Flags & 0x01; 1737 HFI.NumIncludes = ReadUnalignedLE16(d); 1738 HFI.ControllingMacroID = Reader.getGlobalDeclID(M, ReadUnalignedLE32(d)); 1739 if (unsigned FrameworkOffset = ReadUnalignedLE32(d)) { 1740 // The framework offset is 1 greater than the actual offset, 1741 // since 0 is used as an indicator for "no framework name". 1742 StringRef FrameworkName(FrameworkStrings + FrameworkOffset - 1); 1743 HFI.Framework = HS->getUniqueFrameworkName(FrameworkName); 1744 } 1745 1746 assert(End == d && "Wrong data length in HeaderFileInfo deserialization"); 1747 (void)End; 1748 1749 // This HeaderFileInfo was externally loaded. 1750 HFI.External = true; 1751 return HFI; 1752 } 1753 }; 1754} 1755 1756/// \brief The on-disk hash table used for the global method pool. 1757typedef OnDiskChainedHashTable<HeaderFileInfoTrait> 1758 HeaderFileInfoLookupTable; 1759 1760void ASTReader::SetIdentifierIsMacro(IdentifierInfo *II, Module &F, 1761 uint64_t LocalOffset) { 1762 // Note that this identifier has a macro definition. 1763 II->setHasMacroDefinition(true); 1764 1765 // Adjust the offset to a global offset. 1766 UnreadMacroRecordOffsets[II] = F.GlobalBitOffset + LocalOffset; 1767} 1768 1769void ASTReader::ReadDefinedMacros() { 1770 for (ModuleReverseIterator I = ModuleMgr.rbegin(), 1771 E = ModuleMgr.rend(); I != E; ++I) { 1772 llvm::BitstreamCursor &MacroCursor = (*I)->MacroCursor; 1773 1774 // If there was no preprocessor block, skip this file. 1775 if (!MacroCursor.getBitStreamReader()) 1776 continue; 1777 1778 llvm::BitstreamCursor Cursor = MacroCursor; 1779 Cursor.JumpToBit((*I)->MacroStartOffset); 1780 1781 RecordData Record; 1782 while (true) { 1783 unsigned Code = Cursor.ReadCode(); 1784 if (Code == llvm::bitc::END_BLOCK) 1785 break; 1786 1787 if (Code == llvm::bitc::ENTER_SUBBLOCK) { 1788 // No known subblocks, always skip them. 1789 Cursor.ReadSubBlockID(); 1790 if (Cursor.SkipBlock()) { 1791 Error("malformed block record in AST file"); 1792 return; 1793 } 1794 continue; 1795 } 1796 1797 if (Code == llvm::bitc::DEFINE_ABBREV) { 1798 Cursor.ReadAbbrevRecord(); 1799 continue; 1800 } 1801 1802 // Read a record. 1803 const char *BlobStart; 1804 unsigned BlobLen; 1805 Record.clear(); 1806 switch (Cursor.ReadRecord(Code, Record, &BlobStart, &BlobLen)) { 1807 default: // Default behavior: ignore. 1808 break; 1809 1810 case PP_MACRO_OBJECT_LIKE: 1811 case PP_MACRO_FUNCTION_LIKE: 1812 getLocalIdentifier(**I, Record[0]); 1813 break; 1814 1815 case PP_TOKEN: 1816 // Ignore tokens. 1817 break; 1818 } 1819 } 1820 } 1821 1822 // Drain the unread macro-record offsets map. 1823 while (!UnreadMacroRecordOffsets.empty()) 1824 LoadMacroDefinition(UnreadMacroRecordOffsets.begin()); 1825} 1826 1827void ASTReader::LoadMacroDefinition( 1828 llvm::DenseMap<IdentifierInfo *, uint64_t>::iterator Pos) { 1829 assert(Pos != UnreadMacroRecordOffsets.end() && "Unknown macro definition"); 1830 uint64_t Offset = Pos->second; 1831 UnreadMacroRecordOffsets.erase(Pos); 1832 1833 RecordLocation Loc = getLocalBitOffset(Offset); 1834 ReadMacroRecord(*Loc.F, Loc.Offset); 1835} 1836 1837void ASTReader::LoadMacroDefinition(IdentifierInfo *II) { 1838 llvm::DenseMap<IdentifierInfo *, uint64_t>::iterator Pos 1839 = UnreadMacroRecordOffsets.find(II); 1840 LoadMacroDefinition(Pos); 1841} 1842 1843MacroDefinition *ASTReader::getMacroDefinition(MacroID ID) { 1844 if (ID == 0 || ID > MacroDefinitionsLoaded.size()) 1845 return 0; 1846 1847 if (!MacroDefinitionsLoaded[ID - 1]) { 1848 GlobalMacroDefinitionMapType::iterator I =GlobalMacroDefinitionMap.find(ID); 1849 assert(I != GlobalMacroDefinitionMap.end() && 1850 "Corrupted global macro definition map"); 1851 Module &M = *I->second; 1852 unsigned Index = ID - 1 - M.BaseMacroDefinitionID; 1853 SavedStreamPosition SavedPosition(M.PreprocessorDetailCursor); 1854 M.PreprocessorDetailCursor.JumpToBit(M.MacroDefinitionOffsets[Index]); 1855 LoadPreprocessedEntity(M); 1856 } 1857 1858 return MacroDefinitionsLoaded[ID - 1]; 1859} 1860 1861const FileEntry *ASTReader::getFileEntry(StringRef filenameStrRef) { 1862 std::string Filename = filenameStrRef; 1863 MaybeAddSystemRootToFilename(Filename); 1864 const FileEntry *File = FileMgr.getFile(Filename); 1865 if (File == 0 && !OriginalDir.empty() && !CurrentDir.empty() && 1866 OriginalDir != CurrentDir) { 1867 std::string resolved = resolveFileRelativeToOriginalDir(Filename, 1868 OriginalDir, 1869 CurrentDir); 1870 if (!resolved.empty()) 1871 File = FileMgr.getFile(resolved); 1872 } 1873 1874 return File; 1875} 1876 1877MacroID ASTReader::getGlobalMacroDefinitionID(Module &M, unsigned LocalID) { 1878 // FIXME: Local-to-global mapping 1879 return LocalID; 1880} 1881 1882/// \brief If we are loading a relocatable PCH file, and the filename is 1883/// not an absolute path, add the system root to the beginning of the file 1884/// name. 1885void ASTReader::MaybeAddSystemRootToFilename(std::string &Filename) { 1886 // If this is not a relocatable PCH file, there's nothing to do. 1887 if (!RelocatablePCH) 1888 return; 1889 1890 if (Filename.empty() || llvm::sys::path::is_absolute(Filename)) 1891 return; 1892 1893 if (isysroot.empty()) { 1894 // If no system root was given, default to '/' 1895 Filename.insert(Filename.begin(), '/'); 1896 return; 1897 } 1898 1899 unsigned Length = isysroot.size(); 1900 if (isysroot[Length - 1] != '/') 1901 Filename.insert(Filename.begin(), '/'); 1902 1903 Filename.insert(Filename.begin(), isysroot.begin(), isysroot.end()); 1904} 1905 1906ASTReader::ASTReadResult 1907ASTReader::ReadASTBlock(Module &F) { 1908 llvm::BitstreamCursor &Stream = F.Stream; 1909 1910 if (Stream.EnterSubBlock(AST_BLOCK_ID)) { 1911 Error("malformed block record in AST file"); 1912 return Failure; 1913 } 1914 1915 // Read all of the records and blocks for the ASt file. 1916 RecordData Record; 1917 bool First = true; 1918 while (!Stream.AtEndOfStream()) { 1919 unsigned Code = Stream.ReadCode(); 1920 if (Code == llvm::bitc::END_BLOCK) { 1921 if (Stream.ReadBlockEnd()) { 1922 Error("error at end of module block in AST file"); 1923 return Failure; 1924 } 1925 1926 return Success; 1927 } 1928 1929 if (Code == llvm::bitc::ENTER_SUBBLOCK) { 1930 switch (Stream.ReadSubBlockID()) { 1931 case DECLTYPES_BLOCK_ID: 1932 // We lazily load the decls block, but we want to set up the 1933 // DeclsCursor cursor to point into it. Clone our current bitcode 1934 // cursor to it, enter the block and read the abbrevs in that block. 1935 // With the main cursor, we just skip over it. 1936 F.DeclsCursor = Stream; 1937 if (Stream.SkipBlock() || // Skip with the main cursor. 1938 // Read the abbrevs. 1939 ReadBlockAbbrevs(F.DeclsCursor, DECLTYPES_BLOCK_ID)) { 1940 Error("malformed block record in AST file"); 1941 return Failure; 1942 } 1943 break; 1944 1945 case DECL_UPDATES_BLOCK_ID: 1946 if (Stream.SkipBlock()) { 1947 Error("malformed block record in AST file"); 1948 return Failure; 1949 } 1950 break; 1951 1952 case PREPROCESSOR_BLOCK_ID: 1953 F.MacroCursor = Stream; 1954 if (PP) 1955 PP->setExternalSource(this); 1956 1957 if (Stream.SkipBlock() || 1958 ReadBlockAbbrevs(F.MacroCursor, PREPROCESSOR_BLOCK_ID)) { 1959 Error("malformed block record in AST file"); 1960 return Failure; 1961 } 1962 F.MacroStartOffset = F.MacroCursor.GetCurrentBitNo(); 1963 break; 1964 1965 case PREPROCESSOR_DETAIL_BLOCK_ID: 1966 F.PreprocessorDetailCursor = Stream; 1967 if (Stream.SkipBlock() || 1968 ReadBlockAbbrevs(F.PreprocessorDetailCursor, 1969 PREPROCESSOR_DETAIL_BLOCK_ID)) { 1970 Error("malformed preprocessor detail record in AST file"); 1971 return Failure; 1972 } 1973 F.PreprocessorDetailStartOffset 1974 = F.PreprocessorDetailCursor.GetCurrentBitNo(); 1975 break; 1976 1977 case SOURCE_MANAGER_BLOCK_ID: 1978 switch (ReadSourceManagerBlock(F)) { 1979 case Success: 1980 break; 1981 1982 case Failure: 1983 Error("malformed source manager block in AST file"); 1984 return Failure; 1985 1986 case IgnorePCH: 1987 return IgnorePCH; 1988 } 1989 break; 1990 } 1991 First = false; 1992 continue; 1993 } 1994 1995 if (Code == llvm::bitc::DEFINE_ABBREV) { 1996 Stream.ReadAbbrevRecord(); 1997 continue; 1998 } 1999 2000 // Read and process a record. 2001 Record.clear(); 2002 const char *BlobStart = 0; 2003 unsigned BlobLen = 0; 2004 switch ((ASTRecordTypes)Stream.ReadRecord(Code, Record, 2005 &BlobStart, &BlobLen)) { 2006 default: // Default behavior: ignore. 2007 break; 2008 2009 case METADATA: { 2010 if (Record[0] != VERSION_MAJOR && !DisableValidation) { 2011 Diag(Record[0] < VERSION_MAJOR? diag::warn_pch_version_too_old 2012 : diag::warn_pch_version_too_new); 2013 return IgnorePCH; 2014 } 2015 2016 RelocatablePCH = Record[4]; 2017 if (Listener) { 2018 std::string TargetTriple(BlobStart, BlobLen); 2019 if (Listener->ReadTargetTriple(TargetTriple)) 2020 return IgnorePCH; 2021 } 2022 break; 2023 } 2024 2025 case CHAINED_METADATA: { 2026 if (!First) { 2027 Error("CHAINED_METADATA is not first record in block"); 2028 return Failure; 2029 } 2030 if (Record[0] != VERSION_MAJOR && !DisableValidation) { 2031 Diag(Record[0] < VERSION_MAJOR? diag::warn_pch_version_too_old 2032 : diag::warn_pch_version_too_new); 2033 return IgnorePCH; 2034 } 2035 2036 // Load the chained file, which is always a PCH file. 2037 // FIXME: This could end up being a module. 2038 switch(ReadASTCore(StringRef(BlobStart, BlobLen), MK_PCH)) { 2039 case Failure: return Failure; 2040 // If we have to ignore the dependency, we'll have to ignore this too. 2041 case IgnorePCH: return IgnorePCH; 2042 case Success: break; 2043 } 2044 break; 2045 } 2046 2047 case TYPE_OFFSET: { 2048 if (F.LocalNumTypes != 0) { 2049 Error("duplicate TYPE_OFFSET record in AST file"); 2050 return Failure; 2051 } 2052 F.TypeOffsets = (const uint32_t *)BlobStart; 2053 F.LocalNumTypes = Record[0]; 2054 unsigned LocalBaseTypeIndex = Record[1]; 2055 F.BaseTypeIndex = getTotalNumTypes(); 2056 2057 if (F.LocalNumTypes > 0) { 2058 // Introduce the global -> local mapping for types within this module. 2059 GlobalTypeMap.insert(std::make_pair(getTotalNumTypes(), &F)); 2060 2061 // Introduce the local -> global mapping for types within this module. 2062 F.TypeRemap.insert(std::make_pair(LocalBaseTypeIndex, 2063 F.BaseTypeIndex - LocalBaseTypeIndex)); 2064 2065 TypesLoaded.resize(TypesLoaded.size() + F.LocalNumTypes); 2066 } 2067 break; 2068 } 2069 2070 case DECL_OFFSET: { 2071 if (F.LocalNumDecls != 0) { 2072 Error("duplicate DECL_OFFSET record in AST file"); 2073 return Failure; 2074 } 2075 F.DeclOffsets = (const uint32_t *)BlobStart; 2076 F.LocalNumDecls = Record[0]; 2077 unsigned LocalBaseDeclID = Record[1]; 2078 F.BaseDeclID = getTotalNumDecls(); 2079 2080 if (F.LocalNumDecls > 0) { 2081 // Introduce the global -> local mapping for declarations within this 2082 // module. 2083 GlobalDeclMap.insert(std::make_pair(getTotalNumDecls() + 1, &F)); 2084 2085 // Introduce the local -> global mapping for declarations within this 2086 // module. 2087 F.DeclRemap.insert(std::make_pair(LocalBaseDeclID, 2088 F.BaseDeclID - LocalBaseDeclID)); 2089 2090 DeclsLoaded.resize(DeclsLoaded.size() + F.LocalNumDecls); 2091 } 2092 break; 2093 } 2094 2095 case TU_UPDATE_LEXICAL: { 2096 DeclContextInfo Info = { 2097 &F, 2098 /* No visible information */ 0, 2099 reinterpret_cast<const KindDeclIDPair *>(BlobStart), 2100 static_cast<unsigned int>(BlobLen / sizeof(KindDeclIDPair)) 2101 }; 2102 DeclContextOffsets[Context ? Context->getTranslationUnitDecl() : 0] 2103 .push_back(Info); 2104 break; 2105 } 2106 2107 case UPDATE_VISIBLE: { 2108 unsigned Idx = 0; 2109 serialization::DeclID ID = ReadDeclID(F, Record, Idx); 2110 void *Table = ASTDeclContextNameLookupTable::Create( 2111 (const unsigned char *)BlobStart + Record[Idx++], 2112 (const unsigned char *)BlobStart, 2113 ASTDeclContextNameLookupTrait(*this, F)); 2114 // FIXME: Complete hack to check for the TU 2115 if (ID == (*(ModuleMgr.end() - 1))->BaseDeclID + 1 && Context) { // Is it the TU? 2116 DeclContextInfo Info = { 2117 &F, Table, /* No lexical information */ 0, 0 2118 }; 2119 DeclContextOffsets[Context->getTranslationUnitDecl()].push_back(Info); 2120 } else 2121 PendingVisibleUpdates[ID].push_back(std::make_pair(Table, &F)); 2122 break; 2123 } 2124 2125 case REDECLS_UPDATE_LATEST: { 2126 assert(Record.size() % 2 == 0 && "Expected pairs of DeclIDs"); 2127 for (unsigned i = 0, e = Record.size(); i < e; /* in loop */) { 2128 DeclID First = ReadDeclID(F, Record, i); 2129 DeclID Latest = ReadDeclID(F, Record, i); 2130 FirstLatestDeclIDs[First] = Latest; 2131 } 2132 break; 2133 } 2134 2135 case LANGUAGE_OPTIONS: 2136 if (ParseLanguageOptions(Record) && !DisableValidation) 2137 return IgnorePCH; 2138 break; 2139 2140 case IDENTIFIER_TABLE: 2141 F.IdentifierTableData = BlobStart; 2142 if (Record[0]) { 2143 F.IdentifierLookupTable 2144 = ASTIdentifierLookupTable::Create( 2145 (const unsigned char *)F.IdentifierTableData + Record[0], 2146 (const unsigned char *)F.IdentifierTableData, 2147 ASTIdentifierLookupTrait(*this, F)); 2148 if (PP) { 2149 PP->getIdentifierTable().setExternalIdentifierLookup(this); 2150 PP->getHeaderSearchInfo().SetExternalLookup(this); 2151 } 2152 } 2153 break; 2154 2155 case IDENTIFIER_OFFSET: { 2156 if (F.LocalNumIdentifiers != 0) { 2157 Error("duplicate IDENTIFIER_OFFSET record in AST file"); 2158 return Failure; 2159 } 2160 F.IdentifierOffsets = (const uint32_t *)BlobStart; 2161 F.LocalNumIdentifiers = Record[0]; 2162 unsigned LocalBaseIdentifierID = Record[1]; 2163 F.BaseIdentifierID = getTotalNumIdentifiers(); 2164 2165 if (F.LocalNumIdentifiers > 0) { 2166 // Introduce the global -> local mapping for identifiers within this 2167 // module. 2168 GlobalIdentifierMap.insert(std::make_pair(getTotalNumIdentifiers() + 1, 2169 &F)); 2170 2171 // Introduce the local -> global mapping for identifiers within this 2172 // module. 2173 F.IdentifierRemap.insert( 2174 std::make_pair(LocalBaseIdentifierID, 2175 F.BaseIdentifierID - LocalBaseIdentifierID)); 2176 2177 IdentifiersLoaded.resize(IdentifiersLoaded.size() 2178 + F.LocalNumIdentifiers); 2179 } 2180 break; 2181 } 2182 2183 case EXTERNAL_DEFINITIONS: 2184 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2185 ExternalDefinitions.push_back(getGlobalDeclID(F, Record[I])); 2186 break; 2187 2188 case SPECIAL_TYPES: 2189 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2190 SpecialTypes.push_back(getGlobalTypeID(F, Record[I])); 2191 break; 2192 2193 case STATISTICS: 2194 TotalNumStatements += Record[0]; 2195 TotalNumMacros += Record[1]; 2196 TotalLexicalDeclContexts += Record[2]; 2197 TotalVisibleDeclContexts += Record[3]; 2198 break; 2199 2200 case UNUSED_FILESCOPED_DECLS: 2201 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2202 UnusedFileScopedDecls.push_back(getGlobalDeclID(F, Record[I])); 2203 break; 2204 2205 case DELEGATING_CTORS: 2206 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2207 DelegatingCtorDecls.push_back(getGlobalDeclID(F, Record[I])); 2208 break; 2209 2210 case WEAK_UNDECLARED_IDENTIFIERS: 2211 if (Record.size() % 4 != 0) { 2212 Error("invalid weak identifiers record"); 2213 return Failure; 2214 } 2215 2216 // FIXME: Ignore weak undeclared identifiers from non-original PCH 2217 // files. This isn't the way to do it :) 2218 WeakUndeclaredIdentifiers.clear(); 2219 2220 // Translate the weak, undeclared identifiers into global IDs. 2221 for (unsigned I = 0, N = Record.size(); I < N; /* in loop */) { 2222 WeakUndeclaredIdentifiers.push_back( 2223 getGlobalIdentifierID(F, Record[I++])); 2224 WeakUndeclaredIdentifiers.push_back( 2225 getGlobalIdentifierID(F, Record[I++])); 2226 WeakUndeclaredIdentifiers.push_back( 2227 ReadSourceLocation(F, Record, I).getRawEncoding()); 2228 WeakUndeclaredIdentifiers.push_back(Record[I++]); 2229 } 2230 break; 2231 2232 case LOCALLY_SCOPED_EXTERNAL_DECLS: 2233 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2234 LocallyScopedExternalDecls.push_back(getGlobalDeclID(F, Record[I])); 2235 break; 2236 2237 case SELECTOR_OFFSETS: { 2238 F.SelectorOffsets = (const uint32_t *)BlobStart; 2239 F.LocalNumSelectors = Record[0]; 2240 unsigned LocalBaseSelectorID = Record[1]; 2241 F.BaseSelectorID = getTotalNumSelectors(); 2242 2243 if (F.LocalNumSelectors > 0) { 2244 // Introduce the global -> local mapping for selectors within this 2245 // module. 2246 GlobalSelectorMap.insert(std::make_pair(getTotalNumSelectors()+1, &F)); 2247 2248 // Introduce the local -> global mapping for selectors within this 2249 // module. 2250 F.SelectorRemap.insert(std::make_pair(LocalBaseSelectorID, 2251 F.BaseSelectorID - LocalBaseSelectorID)); 2252 2253 SelectorsLoaded.resize(SelectorsLoaded.size() + F.LocalNumSelectors); 2254 } 2255 break; 2256 } 2257 2258 case METHOD_POOL: 2259 F.SelectorLookupTableData = (const unsigned char *)BlobStart; 2260 if (Record[0]) 2261 F.SelectorLookupTable 2262 = ASTSelectorLookupTable::Create( 2263 F.SelectorLookupTableData + Record[0], 2264 F.SelectorLookupTableData, 2265 ASTSelectorLookupTrait(*this, F)); 2266 TotalNumMethodPoolEntries += Record[1]; 2267 break; 2268 2269 case REFERENCED_SELECTOR_POOL: 2270 if (!Record.empty()) { 2271 for (unsigned Idx = 0, N = Record.size() - 1; Idx < N; /* in loop */) { 2272 ReferencedSelectorsData.push_back(getGlobalSelectorID(F, 2273 Record[Idx++])); 2274 ReferencedSelectorsData.push_back(ReadSourceLocation(F, Record, Idx). 2275 getRawEncoding()); 2276 } 2277 } 2278 break; 2279 2280 case PP_COUNTER_VALUE: 2281 if (!Record.empty() && Listener) 2282 Listener->ReadCounter(Record[0]); 2283 break; 2284 2285 case SOURCE_LOCATION_OFFSETS: { 2286 F.SLocEntryOffsets = (const uint32_t *)BlobStart; 2287 F.LocalNumSLocEntries = Record[0]; 2288 llvm::tie(F.SLocEntryBaseID, F.SLocEntryBaseOffset) = 2289 SourceMgr.AllocateLoadedSLocEntries(F.LocalNumSLocEntries, Record[1]); 2290 // Make our entry in the range map. BaseID is negative and growing, so 2291 // we invert it. Because we invert it, though, we need the other end of 2292 // the range. 2293 unsigned RangeStart = 2294 unsigned(-F.SLocEntryBaseID) - F.LocalNumSLocEntries + 1; 2295 GlobalSLocEntryMap.insert(std::make_pair(RangeStart, &F)); 2296 F.FirstLoc = SourceLocation::getFromRawEncoding(F.SLocEntryBaseOffset); 2297 2298 // Initialize the remapping table. 2299 // Invalid stays invalid. 2300 F.SLocRemap.insert(std::make_pair(0U, 0)); 2301 // This module. Base was 2 when being compiled. 2302 F.SLocRemap.insert(std::make_pair(2U, 2303 static_cast<int>(F.SLocEntryBaseOffset - 2))); 2304 2305 TotalNumSLocEntries += F.LocalNumSLocEntries; 2306 break; 2307 } 2308 2309 case MODULE_OFFSET_MAP: { 2310 // Additional remapping information. 2311 const unsigned char *Data = (const unsigned char*)BlobStart; 2312 const unsigned char *DataEnd = Data + BlobLen; 2313 2314 // Continuous range maps we may be updating in our module. 2315 ContinuousRangeMap<uint32_t, int, 2>::Builder SLocRemap(F.SLocRemap); 2316 ContinuousRangeMap<uint32_t, int, 2>::Builder 2317 IdentifierRemap(F.IdentifierRemap); 2318 ContinuousRangeMap<uint32_t, int, 2>::Builder 2319 SelectorRemap(F.SelectorRemap); 2320 ContinuousRangeMap<uint32_t, int, 2>::Builder DeclRemap(F.DeclRemap); 2321 ContinuousRangeMap<uint32_t, int, 2>::Builder TypeRemap(F.TypeRemap); 2322 2323 while(Data < DataEnd) { 2324 uint16_t Len = io::ReadUnalignedLE16(Data); 2325 StringRef Name = StringRef((const char*)Data, Len); 2326 Data += Len; 2327 Module *OM = ModuleMgr.lookup(Name); 2328 if (!OM) { 2329 Error("SourceLocation remap refers to unknown module"); 2330 return Failure; 2331 } 2332 2333 uint32_t SLocOffset = io::ReadUnalignedLE32(Data); 2334 uint32_t IdentifierIDOffset = io::ReadUnalignedLE32(Data); 2335 uint32_t PreprocessedEntityIDOffset = io::ReadUnalignedLE32(Data); 2336 uint32_t MacroDefinitionIDOffset = io::ReadUnalignedLE32(Data); 2337 uint32_t SelectorIDOffset = io::ReadUnalignedLE32(Data); 2338 uint32_t DeclIDOffset = io::ReadUnalignedLE32(Data); 2339 uint32_t TypeIndexOffset = io::ReadUnalignedLE32(Data); 2340 2341 // Source location offset is mapped to OM->SLocEntryBaseOffset. 2342 SLocRemap.insert(std::make_pair(SLocOffset, 2343 static_cast<int>(OM->SLocEntryBaseOffset - SLocOffset))); 2344 2345 // FIXME: Map other locations 2346 IdentifierRemap.insert( 2347 std::make_pair(IdentifierIDOffset, 2348 OM->BaseIdentifierID - IdentifierIDOffset)); 2349 (void)PreprocessedEntityIDOffset; 2350 (void)MacroDefinitionIDOffset; 2351 SelectorRemap.insert(std::make_pair(SelectorIDOffset, 2352 OM->BaseSelectorID - SelectorIDOffset)); 2353 DeclRemap.insert(std::make_pair(DeclIDOffset, 2354 OM->BaseDeclID - DeclIDOffset)); 2355 2356 TypeRemap.insert(std::make_pair(TypeIndexOffset, 2357 OM->BaseTypeIndex - TypeIndexOffset)); 2358 } 2359 break; 2360 } 2361 2362 case SOURCE_MANAGER_LINE_TABLE: 2363 if (ParseLineTable(F, Record)) 2364 return Failure; 2365 break; 2366 2367 case FILE_SOURCE_LOCATION_OFFSETS: 2368 F.SLocFileOffsets = (const uint32_t *)BlobStart; 2369 F.LocalNumSLocFileEntries = Record[0]; 2370 break; 2371 2372 case SOURCE_LOCATION_PRELOADS: { 2373 // Need to transform from the local view (1-based IDs) to the global view, 2374 // which is based off F.SLocEntryBaseID. 2375 PreloadSLocEntries.reserve(PreloadSLocEntries.size() + Record.size()); 2376 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2377 PreloadSLocEntries.push_back(int(Record[I] - 1) + F.SLocEntryBaseID); 2378 break; 2379 } 2380 2381 case STAT_CACHE: { 2382 if (!DisableStatCache) { 2383 ASTStatCache *MyStatCache = 2384 new ASTStatCache((const unsigned char *)BlobStart + Record[0], 2385 (const unsigned char *)BlobStart, 2386 NumStatHits, NumStatMisses); 2387 FileMgr.addStatCache(MyStatCache); 2388 F.StatCache = MyStatCache; 2389 } 2390 break; 2391 } 2392 2393 case EXT_VECTOR_DECLS: 2394 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2395 ExtVectorDecls.push_back(getGlobalDeclID(F, Record[I])); 2396 break; 2397 2398 case VTABLE_USES: 2399 if (Record.size() % 3 != 0) { 2400 Error("Invalid VTABLE_USES record"); 2401 return Failure; 2402 } 2403 2404 // Later tables overwrite earlier ones. 2405 // FIXME: Modules will have some trouble with this. This is clearly not 2406 // the right way to do this. 2407 VTableUses.clear(); 2408 2409 for (unsigned Idx = 0, N = Record.size(); Idx != N; /* In loop */) { 2410 VTableUses.push_back(getGlobalDeclID(F, Record[Idx++])); 2411 VTableUses.push_back( 2412 ReadSourceLocation(F, Record, Idx).getRawEncoding()); 2413 VTableUses.push_back(Record[Idx++]); 2414 } 2415 break; 2416 2417 case DYNAMIC_CLASSES: 2418 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2419 DynamicClasses.push_back(getGlobalDeclID(F, Record[I])); 2420 break; 2421 2422 case PENDING_IMPLICIT_INSTANTIATIONS: 2423 if (PendingInstantiations.size() % 2 != 0) { 2424 Error("Invalid PENDING_IMPLICIT_INSTANTIATIONS block"); 2425 return Failure; 2426 } 2427 2428 // Later lists of pending instantiations overwrite earlier ones. 2429 // FIXME: This is most certainly wrong for modules. 2430 PendingInstantiations.clear(); 2431 for (unsigned I = 0, N = Record.size(); I != N; /* in loop */) { 2432 PendingInstantiations.push_back(getGlobalDeclID(F, Record[I++])); 2433 PendingInstantiations.push_back( 2434 ReadSourceLocation(F, Record, I).getRawEncoding()); 2435 } 2436 break; 2437 2438 case SEMA_DECL_REFS: 2439 // Later tables overwrite earlier ones. 2440 // FIXME: Modules will have some trouble with this. 2441 SemaDeclRefs.clear(); 2442 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2443 SemaDeclRefs.push_back(getGlobalDeclID(F, Record[I])); 2444 break; 2445 2446 case ORIGINAL_FILE_NAME: 2447 // The primary AST will be the last to get here, so it will be the one 2448 // that's used. 2449 ActualOriginalFileName.assign(BlobStart, BlobLen); 2450 OriginalFileName = ActualOriginalFileName; 2451 MaybeAddSystemRootToFilename(OriginalFileName); 2452 break; 2453 2454 case ORIGINAL_FILE_ID: 2455 OriginalFileID = FileID::get(Record[0]); 2456 break; 2457 2458 case ORIGINAL_PCH_DIR: 2459 // The primary AST will be the last to get here, so it will be the one 2460 // that's used. 2461 OriginalDir.assign(BlobStart, BlobLen); 2462 break; 2463 2464 case VERSION_CONTROL_BRANCH_REVISION: { 2465 const std::string &CurBranch = getClangFullRepositoryVersion(); 2466 StringRef ASTBranch(BlobStart, BlobLen); 2467 if (StringRef(CurBranch) != ASTBranch && !DisableValidation) { 2468 Diag(diag::warn_pch_different_branch) << ASTBranch << CurBranch; 2469 return IgnorePCH; 2470 } 2471 break; 2472 } 2473 2474 case MACRO_DEFINITION_OFFSETS: { 2475 F.MacroDefinitionOffsets = (const uint32_t *)BlobStart; 2476 F.NumPreallocatedPreprocessingEntities = Record[0]; 2477 F.LocalNumMacroDefinitions = Record[1]; 2478 2479 // Introduce the global -> local mapping for preprocessed entities within 2480 // this AST file. 2481 unsigned StartingID; 2482 if (PP) { 2483 if (!PP->getPreprocessingRecord()) 2484 PP->createPreprocessingRecord(true); 2485 if (!PP->getPreprocessingRecord()->getExternalSource()) 2486 PP->getPreprocessingRecord()->SetExternalSource(*this); 2487 StartingID 2488 = PP->getPreprocessingRecord() 2489 ->allocateLoadedEntities(F.NumPreallocatedPreprocessingEntities); 2490 } else { 2491 // FIXME: We'll eventually want to kill this path, since it assumes 2492 // a particular allocation strategy in the preprocessing record. 2493 StartingID = getTotalNumPreprocessedEntities(); 2494 } 2495 2496 F.BaseMacroDefinitionID = getTotalNumMacroDefinitions(); 2497 F.BasePreprocessedEntityID = StartingID; 2498 2499 // Introduce the global -> local mapping for macro definitions within 2500 // this AST file. 2501 GlobalPreprocessedEntityMap.insert(std::make_pair(StartingID, &F)); 2502 GlobalMacroDefinitionMap.insert( 2503 std::make_pair(getTotalNumMacroDefinitions() + 1, &F)); 2504 MacroDefinitionsLoaded.resize( 2505 MacroDefinitionsLoaded.size() + F.LocalNumMacroDefinitions); 2506 break; 2507 } 2508 2509 case DECL_UPDATE_OFFSETS: { 2510 if (Record.size() % 2 != 0) { 2511 Error("invalid DECL_UPDATE_OFFSETS block in AST file"); 2512 return Failure; 2513 } 2514 for (unsigned I = 0, N = Record.size(); I != N; I += 2) 2515 DeclUpdateOffsets[getGlobalDeclID(F, Record[I])] 2516 .push_back(std::make_pair(&F, Record[I+1])); 2517 break; 2518 } 2519 2520 case DECL_REPLACEMENTS: { 2521 if (Record.size() % 2 != 0) { 2522 Error("invalid DECL_REPLACEMENTS block in AST file"); 2523 return Failure; 2524 } 2525 for (unsigned I = 0, N = Record.size(); I != N; I += 2) 2526 ReplacedDecls[getGlobalDeclID(F, Record[I])] 2527 = std::make_pair(&F, Record[I+1]); 2528 break; 2529 } 2530 2531 case CXX_BASE_SPECIFIER_OFFSETS: { 2532 if (F.LocalNumCXXBaseSpecifiers != 0) { 2533 Error("duplicate CXX_BASE_SPECIFIER_OFFSETS record in AST file"); 2534 return Failure; 2535 } 2536 2537 F.LocalNumCXXBaseSpecifiers = Record[0]; 2538 F.CXXBaseSpecifiersOffsets = (const uint32_t *)BlobStart; 2539 NumCXXBaseSpecifiersLoaded += F.LocalNumCXXBaseSpecifiers; 2540 break; 2541 } 2542 2543 case DIAG_PRAGMA_MAPPINGS: 2544 if (Record.size() % 2 != 0) { 2545 Error("invalid DIAG_USER_MAPPINGS block in AST file"); 2546 return Failure; 2547 } 2548 2549 if (F.PragmaDiagMappings.empty()) 2550 F.PragmaDiagMappings.swap(Record); 2551 else 2552 F.PragmaDiagMappings.insert(F.PragmaDiagMappings.end(), 2553 Record.begin(), Record.end()); 2554 break; 2555 2556 case CUDA_SPECIAL_DECL_REFS: 2557 // Later tables overwrite earlier ones. 2558 // FIXME: Modules will have trouble with this. 2559 CUDASpecialDeclRefs.clear(); 2560 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2561 CUDASpecialDeclRefs.push_back(getGlobalDeclID(F, Record[I])); 2562 break; 2563 2564 case HEADER_SEARCH_TABLE: { 2565 F.HeaderFileInfoTableData = BlobStart; 2566 F.LocalNumHeaderFileInfos = Record[1]; 2567 F.HeaderFileFrameworkStrings = BlobStart + Record[2]; 2568 if (Record[0]) { 2569 F.HeaderFileInfoTable 2570 = HeaderFileInfoLookupTable::Create( 2571 (const unsigned char *)F.HeaderFileInfoTableData + Record[0], 2572 (const unsigned char *)F.HeaderFileInfoTableData, 2573 HeaderFileInfoTrait(*this, F, 2574 PP? &PP->getHeaderSearchInfo() : 0, 2575 BlobStart + Record[2])); 2576 if (PP) 2577 PP->getHeaderSearchInfo().SetExternalSource(this); 2578 } 2579 break; 2580 } 2581 2582 case FP_PRAGMA_OPTIONS: 2583 // Later tables overwrite earlier ones. 2584 FPPragmaOptions.swap(Record); 2585 break; 2586 2587 case OPENCL_EXTENSIONS: 2588 // Later tables overwrite earlier ones. 2589 OpenCLExtensions.swap(Record); 2590 break; 2591 2592 case TENTATIVE_DEFINITIONS: 2593 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2594 TentativeDefinitions.push_back(getGlobalDeclID(F, Record[I])); 2595 break; 2596 2597 case KNOWN_NAMESPACES: 2598 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2599 KnownNamespaces.push_back(getGlobalDeclID(F, Record[I])); 2600 break; 2601 } 2602 First = false; 2603 } 2604 Error("premature end of bitstream in AST file"); 2605 return Failure; 2606} 2607 2608ASTReader::ASTReadResult ASTReader::validateFileEntries() { 2609 for (ModuleIterator I = ModuleMgr.begin(), 2610 E = ModuleMgr.end(); I != E; ++I) { 2611 Module *F = *I; 2612 llvm::BitstreamCursor &SLocEntryCursor = F->SLocEntryCursor; 2613 2614 for (unsigned i = 0, e = F->LocalNumSLocFileEntries; i != e; ++i) { 2615 SLocEntryCursor.JumpToBit(F->SLocFileOffsets[i]); 2616 unsigned Code = SLocEntryCursor.ReadCode(); 2617 if (Code == llvm::bitc::END_BLOCK || 2618 Code == llvm::bitc::ENTER_SUBBLOCK || 2619 Code == llvm::bitc::DEFINE_ABBREV) { 2620 Error("incorrectly-formatted source location entry in AST file"); 2621 return Failure; 2622 } 2623 2624 RecordData Record; 2625 const char *BlobStart; 2626 unsigned BlobLen; 2627 switch (SLocEntryCursor.ReadRecord(Code, Record, &BlobStart, &BlobLen)) { 2628 default: 2629 Error("incorrectly-formatted source location entry in AST file"); 2630 return Failure; 2631 2632 case SM_SLOC_FILE_ENTRY: { 2633 StringRef Filename(BlobStart, BlobLen); 2634 const FileEntry *File = getFileEntry(Filename); 2635 2636 if (File == 0) { 2637 std::string ErrorStr = "could not find file '"; 2638 ErrorStr += Filename; 2639 ErrorStr += "' referenced by AST file"; 2640 Error(ErrorStr.c_str()); 2641 return IgnorePCH; 2642 } 2643 2644 if (Record.size() < 6) { 2645 Error("source location entry is incorrect"); 2646 return Failure; 2647 } 2648 2649 // The stat info from the FileEntry came from the cached stat 2650 // info of the PCH, so we cannot trust it. 2651 struct stat StatBuf; 2652 if (::stat(File->getName(), &StatBuf) != 0) { 2653 StatBuf.st_size = File->getSize(); 2654 StatBuf.st_mtime = File->getModificationTime(); 2655 } 2656 2657 if (((off_t)Record[4] != StatBuf.st_size 2658#if !defined(LLVM_ON_WIN32) 2659 // In our regression testing, the Windows file system seems to 2660 // have inconsistent modification times that sometimes 2661 // erroneously trigger this error-handling path. 2662 || (time_t)Record[5] != StatBuf.st_mtime 2663#endif 2664 )) { 2665 Error(diag::err_fe_pch_file_modified, Filename); 2666 return IgnorePCH; 2667 } 2668 2669 break; 2670 } 2671 } 2672 } 2673 } 2674 2675 return Success; 2676} 2677 2678ASTReader::ASTReadResult ASTReader::ReadAST(const std::string &FileName, 2679 ModuleKind Type) { 2680 switch(ReadASTCore(FileName, Type)) { 2681 case Failure: return Failure; 2682 case IgnorePCH: return IgnorePCH; 2683 case Success: break; 2684 } 2685 2686 // Here comes stuff that we only do once the entire chain is loaded. 2687 2688 if (!DisableValidation) { 2689 switch(validateFileEntries()) { 2690 case Failure: return Failure; 2691 case IgnorePCH: return IgnorePCH; 2692 case Success: break; 2693 } 2694 } 2695 2696 // Preload SLocEntries. 2697 for (unsigned I = 0, N = PreloadSLocEntries.size(); I != N; ++I) { 2698 ASTReadResult Result = ReadSLocEntryRecord(PreloadSLocEntries[I]); 2699 if (Result != Success) 2700 return Failure; 2701 } 2702 PreloadSLocEntries.clear(); 2703 2704 // Check the predefines buffers. 2705 if (!DisableValidation && Type != MK_Module && CheckPredefinesBuffers()) 2706 return IgnorePCH; 2707 2708 if (PP) { 2709 // Initialization of keywords and pragmas occurs before the 2710 // AST file is read, so there may be some identifiers that were 2711 // loaded into the IdentifierTable before we intercepted the 2712 // creation of identifiers. Iterate through the list of known 2713 // identifiers and determine whether we have to establish 2714 // preprocessor definitions or top-level identifier declaration 2715 // chains for those identifiers. 2716 // 2717 // We copy the IdentifierInfo pointers to a small vector first, 2718 // since de-serializing declarations or macro definitions can add 2719 // new entries into the identifier table, invalidating the 2720 // iterators. 2721 // 2722 // FIXME: We need a lazier way to load this information, e.g., by marking 2723 // the identifier data as 'dirty', so that it will be looked up in the 2724 // AST file(s) if it is uttered in the source. This could save us some 2725 // module load time. 2726 SmallVector<IdentifierInfo *, 128> Identifiers; 2727 for (IdentifierTable::iterator Id = PP->getIdentifierTable().begin(), 2728 IdEnd = PP->getIdentifierTable().end(); 2729 Id != IdEnd; ++Id) 2730 Identifiers.push_back(Id->second); 2731 // We need to search the tables in all files. 2732 for (ModuleIterator J = ModuleMgr.begin(), 2733 M = ModuleMgr.end(); J != M; ++J) { 2734 ASTIdentifierLookupTable *IdTable 2735 = (ASTIdentifierLookupTable *)(*J)->IdentifierLookupTable; 2736 // Not all AST files necessarily have identifier tables, only the useful 2737 // ones. 2738 if (!IdTable) 2739 continue; 2740 for (unsigned I = 0, N = Identifiers.size(); I != N; ++I) { 2741 IdentifierInfo *II = Identifiers[I]; 2742 // Look in the on-disk hash tables for an entry for this identifier 2743 ASTIdentifierLookupTrait Info(*this, *(*J), II); 2744 std::pair<const char*,unsigned> Key(II->getNameStart(),II->getLength()); 2745 ASTIdentifierLookupTable::iterator Pos = IdTable->find(Key, &Info); 2746 if (Pos == IdTable->end()) 2747 continue; 2748 2749 // Dereferencing the iterator has the effect of populating the 2750 // IdentifierInfo node with the various declarations it needs. 2751 (void)*Pos; 2752 } 2753 } 2754 } 2755 2756 if (Context) 2757 InitializeContext(*Context); 2758 2759 if (DeserializationListener) 2760 DeserializationListener->ReaderInitialized(this); 2761 2762 // If this AST file is a precompiled preamble, then set the main file ID of 2763 // the source manager to the file source file from which the preamble was 2764 // built. This is the only valid way to use a precompiled preamble. 2765 if (Type == MK_Preamble) { 2766 if (OriginalFileID.isInvalid()) { 2767 SourceLocation Loc 2768 = SourceMgr.getLocation(FileMgr.getFile(getOriginalSourceFile()), 1, 1); 2769 if (Loc.isValid()) 2770 OriginalFileID = SourceMgr.getDecomposedLoc(Loc).first; 2771 } 2772 else { 2773 OriginalFileID = FileID::get(ModuleMgr.getPrimaryModule().SLocEntryBaseID 2774 + OriginalFileID.getOpaqueValue() - 1); 2775 } 2776 2777 if (!OriginalFileID.isInvalid()) 2778 SourceMgr.SetPreambleFileID(OriginalFileID); 2779 } 2780 2781 return Success; 2782} 2783 2784ASTReader::ASTReadResult ASTReader::ReadASTCore(StringRef FileName, 2785 ModuleKind Type) { 2786 Module &F = ModuleMgr.addModule(FileName, Type); 2787 2788 if (FileName != "-") { 2789 CurrentDir = llvm::sys::path::parent_path(FileName); 2790 if (CurrentDir.empty()) CurrentDir = "."; 2791 } 2792 2793 if (llvm::MemoryBuffer *Buffer = ModuleMgr.lookupBuffer(FileName)) { 2794 F.Buffer.reset(Buffer); 2795 assert(F.Buffer && "Passed null buffer"); 2796 } else { 2797 // Open the AST file. 2798 // 2799 // FIXME: This shouldn't be here, we should just take a raw_ostream. 2800 std::string ErrStr; 2801 llvm::error_code ec; 2802 if (FileName == "-") { 2803 ec = llvm::MemoryBuffer::getSTDIN(F.Buffer); 2804 if (ec) 2805 ErrStr = ec.message(); 2806 } else 2807 F.Buffer.reset(FileMgr.getBufferForFile(FileName, &ErrStr)); 2808 if (!F.Buffer) { 2809 Error(ErrStr.c_str()); 2810 return IgnorePCH; 2811 } 2812 } 2813 2814 // Initialize the stream 2815 F.StreamFile.init((const unsigned char *)F.Buffer->getBufferStart(), 2816 (const unsigned char *)F.Buffer->getBufferEnd()); 2817 llvm::BitstreamCursor &Stream = F.Stream; 2818 Stream.init(F.StreamFile); 2819 F.SizeInBits = F.Buffer->getBufferSize() * 8; 2820 2821 // Sniff for the signature. 2822 if (Stream.Read(8) != 'C' || 2823 Stream.Read(8) != 'P' || 2824 Stream.Read(8) != 'C' || 2825 Stream.Read(8) != 'H') { 2826 Diag(diag::err_not_a_pch_file) << FileName; 2827 return Failure; 2828 } 2829 2830 while (!Stream.AtEndOfStream()) { 2831 unsigned Code = Stream.ReadCode(); 2832 2833 if (Code != llvm::bitc::ENTER_SUBBLOCK) { 2834 Error("invalid record at top-level of AST file"); 2835 return Failure; 2836 } 2837 2838 unsigned BlockID = Stream.ReadSubBlockID(); 2839 2840 // We only know the AST subblock ID. 2841 switch (BlockID) { 2842 case llvm::bitc::BLOCKINFO_BLOCK_ID: 2843 if (Stream.ReadBlockInfoBlock()) { 2844 Error("malformed BlockInfoBlock in AST file"); 2845 return Failure; 2846 } 2847 break; 2848 case AST_BLOCK_ID: 2849 switch (ReadASTBlock(F)) { 2850 case Success: 2851 break; 2852 2853 case Failure: 2854 return Failure; 2855 2856 case IgnorePCH: 2857 // FIXME: We could consider reading through to the end of this 2858 // AST block, skipping subblocks, to see if there are other 2859 // AST blocks elsewhere. 2860 2861 // FIXME: We can't clear loaded slocentries anymore. 2862 //SourceMgr.ClearPreallocatedSLocEntries(); 2863 2864 // Remove the stat cache. 2865 if (F.StatCache) 2866 FileMgr.removeStatCache((ASTStatCache*)F.StatCache); 2867 2868 return IgnorePCH; 2869 } 2870 break; 2871 default: 2872 if (Stream.SkipBlock()) { 2873 Error("malformed block record in AST file"); 2874 return Failure; 2875 } 2876 break; 2877 } 2878 } 2879 2880 // Once read, set the Module bit base offset and update the size in 2881 // bits of all files we've seen. 2882 F.GlobalBitOffset = TotalModulesSizeInBits; 2883 TotalModulesSizeInBits += F.SizeInBits; 2884 GlobalBitOffsetsMap.insert(std::make_pair(F.GlobalBitOffset, &F)); 2885 return Success; 2886} 2887 2888void ASTReader::setPreprocessor(Preprocessor &pp) { 2889 PP = &pp; 2890 2891 if (unsigned N = getTotalNumPreprocessedEntities()) { 2892 if (!PP->getPreprocessingRecord()) 2893 PP->createPreprocessingRecord(true); 2894 PP->getPreprocessingRecord()->SetExternalSource(*this); 2895 PP->getPreprocessingRecord()->allocateLoadedEntities(N); 2896 } 2897 2898 PP->getHeaderSearchInfo().SetExternalLookup(this); 2899 PP->getHeaderSearchInfo().SetExternalSource(this); 2900} 2901 2902void ASTReader::InitializeContext(ASTContext &Ctx) { 2903 Context = &Ctx; 2904 assert(Context && "Passed null context!"); 2905 2906 assert(PP && "Forgot to set Preprocessor ?"); 2907 PP->getIdentifierTable().setExternalIdentifierLookup(this); 2908 PP->setExternalSource(this); 2909 2910 // If we have an update block for the TU waiting, we have to add it before 2911 // deserializing the decl. 2912 DeclContextOffsetsMap::iterator DCU = DeclContextOffsets.find(0); 2913 if (DCU != DeclContextOffsets.end()) { 2914 // Insertion could invalidate map, so grab vector. 2915 DeclContextInfos T; 2916 T.swap(DCU->second); 2917 DeclContextOffsets.erase(DCU); 2918 DeclContextOffsets[Ctx.getTranslationUnitDecl()].swap(T); 2919 } 2920 2921 // Load the translation unit declaration 2922 GetTranslationUnitDecl(); 2923 2924 // Load the special types. 2925 Context->setBuiltinVaListType( 2926 GetType(SpecialTypes[SPECIAL_TYPE_BUILTIN_VA_LIST])); 2927 if (unsigned Id = SpecialTypes[SPECIAL_TYPE_OBJC_ID]) 2928 Context->setObjCIdType(GetType(Id)); 2929 if (unsigned Sel = SpecialTypes[SPECIAL_TYPE_OBJC_SELECTOR]) 2930 Context->setObjCSelType(GetType(Sel)); 2931 if (unsigned Proto = SpecialTypes[SPECIAL_TYPE_OBJC_PROTOCOL]) 2932 Context->setObjCProtoType(GetType(Proto)); 2933 if (unsigned Class = SpecialTypes[SPECIAL_TYPE_OBJC_CLASS]) 2934 Context->setObjCClassType(GetType(Class)); 2935 2936 if (unsigned String = SpecialTypes[SPECIAL_TYPE_CF_CONSTANT_STRING]) 2937 Context->setCFConstantStringType(GetType(String)); 2938 if (unsigned FastEnum 2939 = SpecialTypes[SPECIAL_TYPE_OBJC_FAST_ENUMERATION_STATE]) 2940 Context->setObjCFastEnumerationStateType(GetType(FastEnum)); 2941 if (unsigned File = SpecialTypes[SPECIAL_TYPE_FILE]) { 2942 QualType FileType = GetType(File); 2943 if (FileType.isNull()) { 2944 Error("FILE type is NULL"); 2945 return; 2946 } 2947 if (const TypedefType *Typedef = FileType->getAs<TypedefType>()) 2948 Context->setFILEDecl(Typedef->getDecl()); 2949 else { 2950 const TagType *Tag = FileType->getAs<TagType>(); 2951 if (!Tag) { 2952 Error("Invalid FILE type in AST file"); 2953 return; 2954 } 2955 Context->setFILEDecl(Tag->getDecl()); 2956 } 2957 } 2958 if (unsigned Jmp_buf = SpecialTypes[SPECIAL_TYPE_jmp_buf]) { 2959 QualType Jmp_bufType = GetType(Jmp_buf); 2960 if (Jmp_bufType.isNull()) { 2961 Error("jmp_buf type is NULL"); 2962 return; 2963 } 2964 if (const TypedefType *Typedef = Jmp_bufType->getAs<TypedefType>()) 2965 Context->setjmp_bufDecl(Typedef->getDecl()); 2966 else { 2967 const TagType *Tag = Jmp_bufType->getAs<TagType>(); 2968 if (!Tag) { 2969 Error("Invalid jmp_buf type in AST file"); 2970 return; 2971 } 2972 Context->setjmp_bufDecl(Tag->getDecl()); 2973 } 2974 } 2975 if (unsigned Sigjmp_buf = SpecialTypes[SPECIAL_TYPE_sigjmp_buf]) { 2976 QualType Sigjmp_bufType = GetType(Sigjmp_buf); 2977 if (Sigjmp_bufType.isNull()) { 2978 Error("sigjmp_buf type is NULL"); 2979 return; 2980 } 2981 if (const TypedefType *Typedef = Sigjmp_bufType->getAs<TypedefType>()) 2982 Context->setsigjmp_bufDecl(Typedef->getDecl()); 2983 else { 2984 const TagType *Tag = Sigjmp_bufType->getAs<TagType>(); 2985 assert(Tag && "Invalid sigjmp_buf type in AST file"); 2986 Context->setsigjmp_bufDecl(Tag->getDecl()); 2987 } 2988 } 2989 if (unsigned ObjCIdRedef 2990 = SpecialTypes[SPECIAL_TYPE_OBJC_ID_REDEFINITION]) 2991 Context->ObjCIdRedefinitionType = GetType(ObjCIdRedef); 2992 if (unsigned ObjCClassRedef 2993 = SpecialTypes[SPECIAL_TYPE_OBJC_CLASS_REDEFINITION]) 2994 Context->ObjCClassRedefinitionType = GetType(ObjCClassRedef); 2995 if (unsigned String = SpecialTypes[SPECIAL_TYPE_BLOCK_DESCRIPTOR]) 2996 Context->setBlockDescriptorType(GetType(String)); 2997 if (unsigned String 2998 = SpecialTypes[SPECIAL_TYPE_BLOCK_EXTENDED_DESCRIPTOR]) 2999 Context->setBlockDescriptorExtendedType(GetType(String)); 3000 if (unsigned ObjCSelRedef 3001 = SpecialTypes[SPECIAL_TYPE_OBJC_SEL_REDEFINITION]) 3002 Context->ObjCSelRedefinitionType = GetType(ObjCSelRedef); 3003 if (unsigned String = SpecialTypes[SPECIAL_TYPE_NS_CONSTANT_STRING]) 3004 Context->setNSConstantStringType(GetType(String)); 3005 3006 if (SpecialTypes[SPECIAL_TYPE_INT128_INSTALLED]) 3007 Context->setInt128Installed(); 3008 3009 if (unsigned AutoDeduct = SpecialTypes[SPECIAL_TYPE_AUTO_DEDUCT]) 3010 Context->AutoDeductTy = GetType(AutoDeduct); 3011 if (unsigned AutoRRefDeduct = SpecialTypes[SPECIAL_TYPE_AUTO_RREF_DEDUCT]) 3012 Context->AutoRRefDeductTy = GetType(AutoRRefDeduct); 3013 3014 ReadPragmaDiagnosticMappings(Context->getDiagnostics()); 3015 3016 // If there were any CUDA special declarations, deserialize them. 3017 if (!CUDASpecialDeclRefs.empty()) { 3018 assert(CUDASpecialDeclRefs.size() == 1 && "More decl refs than expected!"); 3019 Context->setcudaConfigureCallDecl( 3020 cast<FunctionDecl>(GetDecl(CUDASpecialDeclRefs[0]))); 3021 } 3022} 3023 3024/// \brief Retrieve the name of the original source file name 3025/// directly from the AST file, without actually loading the AST 3026/// file. 3027std::string ASTReader::getOriginalSourceFile(const std::string &ASTFileName, 3028 FileManager &FileMgr, 3029 Diagnostic &Diags) { 3030 // Open the AST file. 3031 std::string ErrStr; 3032 llvm::OwningPtr<llvm::MemoryBuffer> Buffer; 3033 Buffer.reset(FileMgr.getBufferForFile(ASTFileName, &ErrStr)); 3034 if (!Buffer) { 3035 Diags.Report(diag::err_fe_unable_to_read_pch_file) << ErrStr; 3036 return std::string(); 3037 } 3038 3039 // Initialize the stream 3040 llvm::BitstreamReader StreamFile; 3041 llvm::BitstreamCursor Stream; 3042 StreamFile.init((const unsigned char *)Buffer->getBufferStart(), 3043 (const unsigned char *)Buffer->getBufferEnd()); 3044 Stream.init(StreamFile); 3045 3046 // Sniff for the signature. 3047 if (Stream.Read(8) != 'C' || 3048 Stream.Read(8) != 'P' || 3049 Stream.Read(8) != 'C' || 3050 Stream.Read(8) != 'H') { 3051 Diags.Report(diag::err_fe_not_a_pch_file) << ASTFileName; 3052 return std::string(); 3053 } 3054 3055 RecordData Record; 3056 while (!Stream.AtEndOfStream()) { 3057 unsigned Code = Stream.ReadCode(); 3058 3059 if (Code == llvm::bitc::ENTER_SUBBLOCK) { 3060 unsigned BlockID = Stream.ReadSubBlockID(); 3061 3062 // We only know the AST subblock ID. 3063 switch (BlockID) { 3064 case AST_BLOCK_ID: 3065 if (Stream.EnterSubBlock(AST_BLOCK_ID)) { 3066 Diags.Report(diag::err_fe_pch_malformed_block) << ASTFileName; 3067 return std::string(); 3068 } 3069 break; 3070 3071 default: 3072 if (Stream.SkipBlock()) { 3073 Diags.Report(diag::err_fe_pch_malformed_block) << ASTFileName; 3074 return std::string(); 3075 } 3076 break; 3077 } 3078 continue; 3079 } 3080 3081 if (Code == llvm::bitc::END_BLOCK) { 3082 if (Stream.ReadBlockEnd()) { 3083 Diags.Report(diag::err_fe_pch_error_at_end_block) << ASTFileName; 3084 return std::string(); 3085 } 3086 continue; 3087 } 3088 3089 if (Code == llvm::bitc::DEFINE_ABBREV) { 3090 Stream.ReadAbbrevRecord(); 3091 continue; 3092 } 3093 3094 Record.clear(); 3095 const char *BlobStart = 0; 3096 unsigned BlobLen = 0; 3097 if (Stream.ReadRecord(Code, Record, &BlobStart, &BlobLen) 3098 == ORIGINAL_FILE_NAME) 3099 return std::string(BlobStart, BlobLen); 3100 } 3101 3102 return std::string(); 3103} 3104 3105/// \brief Parse the record that corresponds to a LangOptions data 3106/// structure. 3107/// 3108/// This routine parses the language options from the AST file and then gives 3109/// them to the AST listener if one is set. 3110/// 3111/// \returns true if the listener deems the file unacceptable, false otherwise. 3112bool ASTReader::ParseLanguageOptions( 3113 const SmallVectorImpl<uint64_t> &Record) { 3114 if (Listener) { 3115 LangOptions LangOpts; 3116 3117 #define PARSE_LANGOPT(Option) \ 3118 LangOpts.Option = Record[Idx]; \ 3119 ++Idx 3120 3121 unsigned Idx = 0; 3122 PARSE_LANGOPT(Trigraphs); 3123 PARSE_LANGOPT(BCPLComment); 3124 PARSE_LANGOPT(DollarIdents); 3125 PARSE_LANGOPT(AsmPreprocessor); 3126 PARSE_LANGOPT(GNUMode); 3127 PARSE_LANGOPT(GNUKeywords); 3128 PARSE_LANGOPT(ImplicitInt); 3129 PARSE_LANGOPT(Digraphs); 3130 PARSE_LANGOPT(HexFloats); 3131 PARSE_LANGOPT(C99); 3132 PARSE_LANGOPT(C1X); 3133 PARSE_LANGOPT(Microsoft); 3134 PARSE_LANGOPT(CPlusPlus); 3135 PARSE_LANGOPT(CPlusPlus0x); 3136 PARSE_LANGOPT(CXXOperatorNames); 3137 PARSE_LANGOPT(ObjC1); 3138 PARSE_LANGOPT(ObjC2); 3139 PARSE_LANGOPT(ObjCNonFragileABI); 3140 PARSE_LANGOPT(ObjCNonFragileABI2); 3141 PARSE_LANGOPT(AppleKext); 3142 PARSE_LANGOPT(ObjCDefaultSynthProperties); 3143 PARSE_LANGOPT(ObjCInferRelatedResultType); 3144 PARSE_LANGOPT(NoConstantCFStrings); 3145 PARSE_LANGOPT(PascalStrings); 3146 PARSE_LANGOPT(WritableStrings); 3147 PARSE_LANGOPT(LaxVectorConversions); 3148 PARSE_LANGOPT(AltiVec); 3149 PARSE_LANGOPT(Exceptions); 3150 PARSE_LANGOPT(ObjCExceptions); 3151 PARSE_LANGOPT(CXXExceptions); 3152 PARSE_LANGOPT(SjLjExceptions); 3153 PARSE_LANGOPT(MSBitfields); 3154 PARSE_LANGOPT(NeXTRuntime); 3155 PARSE_LANGOPT(Freestanding); 3156 PARSE_LANGOPT(NoBuiltin); 3157 PARSE_LANGOPT(ThreadsafeStatics); 3158 PARSE_LANGOPT(POSIXThreads); 3159 PARSE_LANGOPT(Blocks); 3160 PARSE_LANGOPT(EmitAllDecls); 3161 PARSE_LANGOPT(MathErrno); 3162 LangOpts.setSignedOverflowBehavior((LangOptions::SignedOverflowBehaviorTy) 3163 Record[Idx++]); 3164 PARSE_LANGOPT(HeinousExtensions); 3165 PARSE_LANGOPT(Optimize); 3166 PARSE_LANGOPT(OptimizeSize); 3167 PARSE_LANGOPT(Static); 3168 PARSE_LANGOPT(PICLevel); 3169 PARSE_LANGOPT(GNUInline); 3170 PARSE_LANGOPT(NoInline); 3171 PARSE_LANGOPT(Deprecated); 3172 PARSE_LANGOPT(AccessControl); 3173 PARSE_LANGOPT(CharIsSigned); 3174 PARSE_LANGOPT(ShortWChar); 3175 PARSE_LANGOPT(ShortEnums); 3176 LangOpts.setGCMode((LangOptions::GCMode)Record[Idx++]); 3177 LangOpts.setVisibilityMode((Visibility)Record[Idx++]); 3178 LangOpts.setStackProtectorMode((LangOptions::StackProtectorMode) 3179 Record[Idx++]); 3180 PARSE_LANGOPT(InstantiationDepth); 3181 PARSE_LANGOPT(OpenCL); 3182 PARSE_LANGOPT(CUDA); 3183 PARSE_LANGOPT(CatchUndefined); 3184 PARSE_LANGOPT(DefaultFPContract); 3185 PARSE_LANGOPT(ElideConstructors); 3186 PARSE_LANGOPT(SpellChecking); 3187 PARSE_LANGOPT(MRTD); 3188 PARSE_LANGOPT(ObjCAutoRefCount); 3189 #undef PARSE_LANGOPT 3190 3191 return Listener->ReadLanguageOptions(LangOpts); 3192 } 3193 3194 return false; 3195} 3196 3197void ASTReader::ReadPreprocessedEntities() { 3198 for (ModuleIterator I = ModuleMgr.begin(), E = ModuleMgr.end(); I != E; ++I) { 3199 Module &F = *(*I); 3200 if (!F.PreprocessorDetailCursor.getBitStreamReader()) 3201 continue; 3202 3203 SavedStreamPosition SavedPosition(F.PreprocessorDetailCursor); 3204 F.PreprocessorDetailCursor.JumpToBit(F.PreprocessorDetailStartOffset); 3205 while (LoadPreprocessedEntity(F)) { } 3206 } 3207} 3208 3209PreprocessedEntity *ASTReader::ReadPreprocessedEntityAtOffset(uint64_t Offset) { 3210 RecordLocation Loc = getLocalBitOffset(Offset); 3211 3212 // Keep track of where we are in the stream, then jump back there 3213 // after reading this entity. 3214 SavedStreamPosition SavedPosition(Loc.F->PreprocessorDetailCursor); 3215 Loc.F->PreprocessorDetailCursor.JumpToBit(Loc.Offset); 3216 return LoadPreprocessedEntity(*Loc.F); 3217} 3218 3219HeaderFileInfo ASTReader::GetHeaderFileInfo(const FileEntry *FE) { 3220 for (ModuleIterator I = ModuleMgr.begin(), E = ModuleMgr.end(); I != E; ++I) { 3221 Module &F = *(*I); 3222 3223 HeaderFileInfoTrait Trait(*this, F, &PP->getHeaderSearchInfo(), 3224 F.HeaderFileFrameworkStrings, 3225 FE->getName()); 3226 3227 HeaderFileInfoLookupTable *Table 3228 = static_cast<HeaderFileInfoLookupTable *>(F.HeaderFileInfoTable); 3229 if (!Table) 3230 continue; 3231 3232 // Look in the on-disk hash table for an entry for this file name. 3233 HeaderFileInfoLookupTable::iterator Pos = Table->find(FE->getName(), 3234 &Trait); 3235 if (Pos == Table->end()) 3236 continue; 3237 3238 HeaderFileInfo HFI = *Pos; 3239 if (Listener) 3240 Listener->ReadHeaderFileInfo(HFI, FE->getUID()); 3241 3242 return HFI; 3243 } 3244 3245 return HeaderFileInfo(); 3246} 3247 3248void ASTReader::ReadPragmaDiagnosticMappings(Diagnostic &Diag) { 3249 for (ModuleIterator I = ModuleMgr.begin(), E = ModuleMgr.end(); I != E; ++I) { 3250 Module &F = *(*I); 3251 unsigned Idx = 0; 3252 while (Idx < F.PragmaDiagMappings.size()) { 3253 SourceLocation Loc = ReadSourceLocation(F, F.PragmaDiagMappings[Idx++]); 3254 while (1) { 3255 assert(Idx < F.PragmaDiagMappings.size() && 3256 "Invalid data, didn't find '-1' marking end of diag/map pairs"); 3257 if (Idx >= F.PragmaDiagMappings.size()) { 3258 break; // Something is messed up but at least avoid infinite loop in 3259 // release build. 3260 } 3261 unsigned DiagID = F.PragmaDiagMappings[Idx++]; 3262 if (DiagID == (unsigned)-1) { 3263 break; // no more diag/map pairs for this location. 3264 } 3265 diag::Mapping Map = (diag::Mapping)F.PragmaDiagMappings[Idx++]; 3266 Diag.setDiagnosticMapping(DiagID, Map, Loc); 3267 } 3268 } 3269 } 3270} 3271 3272/// \brief Get the correct cursor and offset for loading a type. 3273ASTReader::RecordLocation ASTReader::TypeCursorForIndex(unsigned Index) { 3274 GlobalTypeMapType::iterator I = GlobalTypeMap.find(Index); 3275 assert(I != GlobalTypeMap.end() && "Corrupted global type map"); 3276 Module *M = I->second; 3277 return RecordLocation(M, M->TypeOffsets[Index - M->BaseTypeIndex]); 3278} 3279 3280/// \brief Read and return the type with the given index.. 3281/// 3282/// The index is the type ID, shifted and minus the number of predefs. This 3283/// routine actually reads the record corresponding to the type at the given 3284/// location. It is a helper routine for GetType, which deals with reading type 3285/// IDs. 3286QualType ASTReader::readTypeRecord(unsigned Index) { 3287 RecordLocation Loc = TypeCursorForIndex(Index); 3288 llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor; 3289 3290 // Keep track of where we are in the stream, then jump back there 3291 // after reading this type. 3292 SavedStreamPosition SavedPosition(DeclsCursor); 3293 3294 ReadingKindTracker ReadingKind(Read_Type, *this); 3295 3296 // Note that we are loading a type record. 3297 Deserializing AType(this); 3298 3299 unsigned Idx = 0; 3300 DeclsCursor.JumpToBit(Loc.Offset); 3301 RecordData Record; 3302 unsigned Code = DeclsCursor.ReadCode(); 3303 switch ((TypeCode)DeclsCursor.ReadRecord(Code, Record)) { 3304 case TYPE_EXT_QUAL: { 3305 if (Record.size() != 2) { 3306 Error("Incorrect encoding of extended qualifier type"); 3307 return QualType(); 3308 } 3309 QualType Base = readType(*Loc.F, Record, Idx); 3310 Qualifiers Quals = Qualifiers::fromOpaqueValue(Record[Idx++]); 3311 return Context->getQualifiedType(Base, Quals); 3312 } 3313 3314 case TYPE_COMPLEX: { 3315 if (Record.size() != 1) { 3316 Error("Incorrect encoding of complex type"); 3317 return QualType(); 3318 } 3319 QualType ElemType = readType(*Loc.F, Record, Idx); 3320 return Context->getComplexType(ElemType); 3321 } 3322 3323 case TYPE_POINTER: { 3324 if (Record.size() != 1) { 3325 Error("Incorrect encoding of pointer type"); 3326 return QualType(); 3327 } 3328 QualType PointeeType = readType(*Loc.F, Record, Idx); 3329 return Context->getPointerType(PointeeType); 3330 } 3331 3332 case TYPE_BLOCK_POINTER: { 3333 if (Record.size() != 1) { 3334 Error("Incorrect encoding of block pointer type"); 3335 return QualType(); 3336 } 3337 QualType PointeeType = readType(*Loc.F, Record, Idx); 3338 return Context->getBlockPointerType(PointeeType); 3339 } 3340 3341 case TYPE_LVALUE_REFERENCE: { 3342 if (Record.size() != 2) { 3343 Error("Incorrect encoding of lvalue reference type"); 3344 return QualType(); 3345 } 3346 QualType PointeeType = readType(*Loc.F, Record, Idx); 3347 return Context->getLValueReferenceType(PointeeType, Record[1]); 3348 } 3349 3350 case TYPE_RVALUE_REFERENCE: { 3351 if (Record.size() != 1) { 3352 Error("Incorrect encoding of rvalue reference type"); 3353 return QualType(); 3354 } 3355 QualType PointeeType = readType(*Loc.F, Record, Idx); 3356 return Context->getRValueReferenceType(PointeeType); 3357 } 3358 3359 case TYPE_MEMBER_POINTER: { 3360 if (Record.size() != 2) { 3361 Error("Incorrect encoding of member pointer type"); 3362 return QualType(); 3363 } 3364 QualType PointeeType = readType(*Loc.F, Record, Idx); 3365 QualType ClassType = readType(*Loc.F, Record, Idx); 3366 if (PointeeType.isNull() || ClassType.isNull()) 3367 return QualType(); 3368 3369 return Context->getMemberPointerType(PointeeType, ClassType.getTypePtr()); 3370 } 3371 3372 case TYPE_CONSTANT_ARRAY: { 3373 QualType ElementType = readType(*Loc.F, Record, Idx); 3374 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1]; 3375 unsigned IndexTypeQuals = Record[2]; 3376 unsigned Idx = 3; 3377 llvm::APInt Size = ReadAPInt(Record, Idx); 3378 return Context->getConstantArrayType(ElementType, Size, 3379 ASM, IndexTypeQuals); 3380 } 3381 3382 case TYPE_INCOMPLETE_ARRAY: { 3383 QualType ElementType = readType(*Loc.F, Record, Idx); 3384 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1]; 3385 unsigned IndexTypeQuals = Record[2]; 3386 return Context->getIncompleteArrayType(ElementType, ASM, IndexTypeQuals); 3387 } 3388 3389 case TYPE_VARIABLE_ARRAY: { 3390 QualType ElementType = readType(*Loc.F, Record, Idx); 3391 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1]; 3392 unsigned IndexTypeQuals = Record[2]; 3393 SourceLocation LBLoc = ReadSourceLocation(*Loc.F, Record[3]); 3394 SourceLocation RBLoc = ReadSourceLocation(*Loc.F, Record[4]); 3395 return Context->getVariableArrayType(ElementType, ReadExpr(*Loc.F), 3396 ASM, IndexTypeQuals, 3397 SourceRange(LBLoc, RBLoc)); 3398 } 3399 3400 case TYPE_VECTOR: { 3401 if (Record.size() != 3) { 3402 Error("incorrect encoding of vector type in AST file"); 3403 return QualType(); 3404 } 3405 3406 QualType ElementType = readType(*Loc.F, Record, Idx); 3407 unsigned NumElements = Record[1]; 3408 unsigned VecKind = Record[2]; 3409 return Context->getVectorType(ElementType, NumElements, 3410 (VectorType::VectorKind)VecKind); 3411 } 3412 3413 case TYPE_EXT_VECTOR: { 3414 if (Record.size() != 3) { 3415 Error("incorrect encoding of extended vector type in AST file"); 3416 return QualType(); 3417 } 3418 3419 QualType ElementType = readType(*Loc.F, Record, Idx); 3420 unsigned NumElements = Record[1]; 3421 return Context->getExtVectorType(ElementType, NumElements); 3422 } 3423 3424 case TYPE_FUNCTION_NO_PROTO: { 3425 if (Record.size() != 6) { 3426 Error("incorrect encoding of no-proto function type"); 3427 return QualType(); 3428 } 3429 QualType ResultType = readType(*Loc.F, Record, Idx); 3430 FunctionType::ExtInfo Info(Record[1], Record[2], Record[3], 3431 (CallingConv)Record[4], Record[5]); 3432 return Context->getFunctionNoProtoType(ResultType, Info); 3433 } 3434 3435 case TYPE_FUNCTION_PROTO: { 3436 QualType ResultType = readType(*Loc.F, Record, Idx); 3437 3438 FunctionProtoType::ExtProtoInfo EPI; 3439 EPI.ExtInfo = FunctionType::ExtInfo(/*noreturn*/ Record[1], 3440 /*hasregparm*/ Record[2], 3441 /*regparm*/ Record[3], 3442 static_cast<CallingConv>(Record[4]), 3443 /*produces*/ Record[5]); 3444 3445 unsigned Idx = 6; 3446 unsigned NumParams = Record[Idx++]; 3447 SmallVector<QualType, 16> ParamTypes; 3448 for (unsigned I = 0; I != NumParams; ++I) 3449 ParamTypes.push_back(readType(*Loc.F, Record, Idx)); 3450 3451 EPI.Variadic = Record[Idx++]; 3452 EPI.TypeQuals = Record[Idx++]; 3453 EPI.RefQualifier = static_cast<RefQualifierKind>(Record[Idx++]); 3454 ExceptionSpecificationType EST = 3455 static_cast<ExceptionSpecificationType>(Record[Idx++]); 3456 EPI.ExceptionSpecType = EST; 3457 if (EST == EST_Dynamic) { 3458 EPI.NumExceptions = Record[Idx++]; 3459 SmallVector<QualType, 2> Exceptions; 3460 for (unsigned I = 0; I != EPI.NumExceptions; ++I) 3461 Exceptions.push_back(readType(*Loc.F, Record, Idx)); 3462 EPI.Exceptions = Exceptions.data(); 3463 } else if (EST == EST_ComputedNoexcept) { 3464 EPI.NoexceptExpr = ReadExpr(*Loc.F); 3465 } 3466 return Context->getFunctionType(ResultType, ParamTypes.data(), NumParams, 3467 EPI); 3468 } 3469 3470 case TYPE_UNRESOLVED_USING: { 3471 unsigned Idx = 0; 3472 return Context->getTypeDeclType( 3473 ReadDeclAs<UnresolvedUsingTypenameDecl>(*Loc.F, Record, Idx)); 3474 } 3475 3476 case TYPE_TYPEDEF: { 3477 if (Record.size() != 2) { 3478 Error("incorrect encoding of typedef type"); 3479 return QualType(); 3480 } 3481 unsigned Idx = 0; 3482 TypedefNameDecl *Decl = ReadDeclAs<TypedefNameDecl>(*Loc.F, Record, Idx); 3483 QualType Canonical = readType(*Loc.F, Record, Idx); 3484 if (!Canonical.isNull()) 3485 Canonical = Context->getCanonicalType(Canonical); 3486 return Context->getTypedefType(Decl, Canonical); 3487 } 3488 3489 case TYPE_TYPEOF_EXPR: 3490 return Context->getTypeOfExprType(ReadExpr(*Loc.F)); 3491 3492 case TYPE_TYPEOF: { 3493 if (Record.size() != 1) { 3494 Error("incorrect encoding of typeof(type) in AST file"); 3495 return QualType(); 3496 } 3497 QualType UnderlyingType = readType(*Loc.F, Record, Idx); 3498 return Context->getTypeOfType(UnderlyingType); 3499 } 3500 3501 case TYPE_DECLTYPE: 3502 return Context->getDecltypeType(ReadExpr(*Loc.F)); 3503 3504 case TYPE_UNARY_TRANSFORM: { 3505 QualType BaseType = readType(*Loc.F, Record, Idx); 3506 QualType UnderlyingType = readType(*Loc.F, Record, Idx); 3507 UnaryTransformType::UTTKind UKind = (UnaryTransformType::UTTKind)Record[2]; 3508 return Context->getUnaryTransformType(BaseType, UnderlyingType, UKind); 3509 } 3510 3511 case TYPE_AUTO: 3512 return Context->getAutoType(readType(*Loc.F, Record, Idx)); 3513 3514 case TYPE_RECORD: { 3515 if (Record.size() != 2) { 3516 Error("incorrect encoding of record type"); 3517 return QualType(); 3518 } 3519 unsigned Idx = 0; 3520 bool IsDependent = Record[Idx++]; 3521 QualType T 3522 = Context->getRecordType(ReadDeclAs<RecordDecl>(*Loc.F, Record, Idx)); 3523 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent); 3524 return T; 3525 } 3526 3527 case TYPE_ENUM: { 3528 if (Record.size() != 2) { 3529 Error("incorrect encoding of enum type"); 3530 return QualType(); 3531 } 3532 unsigned Idx = 0; 3533 bool IsDependent = Record[Idx++]; 3534 QualType T 3535 = Context->getEnumType(ReadDeclAs<EnumDecl>(*Loc.F, Record, Idx)); 3536 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent); 3537 return T; 3538 } 3539 3540 case TYPE_ATTRIBUTED: { 3541 if (Record.size() != 3) { 3542 Error("incorrect encoding of attributed type"); 3543 return QualType(); 3544 } 3545 QualType modifiedType = readType(*Loc.F, Record, Idx); 3546 QualType equivalentType = readType(*Loc.F, Record, Idx); 3547 AttributedType::Kind kind = static_cast<AttributedType::Kind>(Record[2]); 3548 return Context->getAttributedType(kind, modifiedType, equivalentType); 3549 } 3550 3551 case TYPE_PAREN: { 3552 if (Record.size() != 1) { 3553 Error("incorrect encoding of paren type"); 3554 return QualType(); 3555 } 3556 QualType InnerType = readType(*Loc.F, Record, Idx); 3557 return Context->getParenType(InnerType); 3558 } 3559 3560 case TYPE_PACK_EXPANSION: { 3561 if (Record.size() != 2) { 3562 Error("incorrect encoding of pack expansion type"); 3563 return QualType(); 3564 } 3565 QualType Pattern = readType(*Loc.F, Record, Idx); 3566 if (Pattern.isNull()) 3567 return QualType(); 3568 llvm::Optional<unsigned> NumExpansions; 3569 if (Record[1]) 3570 NumExpansions = Record[1] - 1; 3571 return Context->getPackExpansionType(Pattern, NumExpansions); 3572 } 3573 3574 case TYPE_ELABORATED: { 3575 unsigned Idx = 0; 3576 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++]; 3577 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(*Loc.F, Record, Idx); 3578 QualType NamedType = readType(*Loc.F, Record, Idx); 3579 return Context->getElaboratedType(Keyword, NNS, NamedType); 3580 } 3581 3582 case TYPE_OBJC_INTERFACE: { 3583 unsigned Idx = 0; 3584 ObjCInterfaceDecl *ItfD 3585 = ReadDeclAs<ObjCInterfaceDecl>(*Loc.F, Record, Idx); 3586 return Context->getObjCInterfaceType(ItfD); 3587 } 3588 3589 case TYPE_OBJC_OBJECT: { 3590 unsigned Idx = 0; 3591 QualType Base = readType(*Loc.F, Record, Idx); 3592 unsigned NumProtos = Record[Idx++]; 3593 SmallVector<ObjCProtocolDecl*, 4> Protos; 3594 for (unsigned I = 0; I != NumProtos; ++I) 3595 Protos.push_back(ReadDeclAs<ObjCProtocolDecl>(*Loc.F, Record, Idx)); 3596 return Context->getObjCObjectType(Base, Protos.data(), NumProtos); 3597 } 3598 3599 case TYPE_OBJC_OBJECT_POINTER: { 3600 unsigned Idx = 0; 3601 QualType Pointee = readType(*Loc.F, Record, Idx); 3602 return Context->getObjCObjectPointerType(Pointee); 3603 } 3604 3605 case TYPE_SUBST_TEMPLATE_TYPE_PARM: { 3606 unsigned Idx = 0; 3607 QualType Parm = readType(*Loc.F, Record, Idx); 3608 QualType Replacement = readType(*Loc.F, Record, Idx); 3609 return 3610 Context->getSubstTemplateTypeParmType(cast<TemplateTypeParmType>(Parm), 3611 Replacement); 3612 } 3613 3614 case TYPE_SUBST_TEMPLATE_TYPE_PARM_PACK: { 3615 unsigned Idx = 0; 3616 QualType Parm = readType(*Loc.F, Record, Idx); 3617 TemplateArgument ArgPack = ReadTemplateArgument(*Loc.F, Record, Idx); 3618 return Context->getSubstTemplateTypeParmPackType( 3619 cast<TemplateTypeParmType>(Parm), 3620 ArgPack); 3621 } 3622 3623 case TYPE_INJECTED_CLASS_NAME: { 3624 CXXRecordDecl *D = ReadDeclAs<CXXRecordDecl>(*Loc.F, Record, Idx); 3625 QualType TST = readType(*Loc.F, Record, Idx); // probably derivable 3626 // FIXME: ASTContext::getInjectedClassNameType is not currently suitable 3627 // for AST reading, too much interdependencies. 3628 return 3629 QualType(new (*Context, TypeAlignment) InjectedClassNameType(D, TST), 0); 3630 } 3631 3632 case TYPE_TEMPLATE_TYPE_PARM: { 3633 unsigned Idx = 0; 3634 unsigned Depth = Record[Idx++]; 3635 unsigned Index = Record[Idx++]; 3636 bool Pack = Record[Idx++]; 3637 TemplateTypeParmDecl *D 3638 = ReadDeclAs<TemplateTypeParmDecl>(*Loc.F, Record, Idx); 3639 return Context->getTemplateTypeParmType(Depth, Index, Pack, D); 3640 } 3641 3642 case TYPE_DEPENDENT_NAME: { 3643 unsigned Idx = 0; 3644 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++]; 3645 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(*Loc.F, Record, Idx); 3646 const IdentifierInfo *Name = this->GetIdentifierInfo(*Loc.F, Record, Idx); 3647 QualType Canon = readType(*Loc.F, Record, Idx); 3648 if (!Canon.isNull()) 3649 Canon = Context->getCanonicalType(Canon); 3650 return Context->getDependentNameType(Keyword, NNS, Name, Canon); 3651 } 3652 3653 case TYPE_DEPENDENT_TEMPLATE_SPECIALIZATION: { 3654 unsigned Idx = 0; 3655 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++]; 3656 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(*Loc.F, Record, Idx); 3657 const IdentifierInfo *Name = this->GetIdentifierInfo(*Loc.F, Record, Idx); 3658 unsigned NumArgs = Record[Idx++]; 3659 SmallVector<TemplateArgument, 8> Args; 3660 Args.reserve(NumArgs); 3661 while (NumArgs--) 3662 Args.push_back(ReadTemplateArgument(*Loc.F, Record, Idx)); 3663 return Context->getDependentTemplateSpecializationType(Keyword, NNS, Name, 3664 Args.size(), Args.data()); 3665 } 3666 3667 case TYPE_DEPENDENT_SIZED_ARRAY: { 3668 unsigned Idx = 0; 3669 3670 // ArrayType 3671 QualType ElementType = readType(*Loc.F, Record, Idx); 3672 ArrayType::ArraySizeModifier ASM 3673 = (ArrayType::ArraySizeModifier)Record[Idx++]; 3674 unsigned IndexTypeQuals = Record[Idx++]; 3675 3676 // DependentSizedArrayType 3677 Expr *NumElts = ReadExpr(*Loc.F); 3678 SourceRange Brackets = ReadSourceRange(*Loc.F, Record, Idx); 3679 3680 return Context->getDependentSizedArrayType(ElementType, NumElts, ASM, 3681 IndexTypeQuals, Brackets); 3682 } 3683 3684 case TYPE_TEMPLATE_SPECIALIZATION: { 3685 unsigned Idx = 0; 3686 bool IsDependent = Record[Idx++]; 3687 TemplateName Name = ReadTemplateName(*Loc.F, Record, Idx); 3688 SmallVector<TemplateArgument, 8> Args; 3689 ReadTemplateArgumentList(Args, *Loc.F, Record, Idx); 3690 QualType Underlying = readType(*Loc.F, Record, Idx); 3691 QualType T; 3692 if (Underlying.isNull()) 3693 T = Context->getCanonicalTemplateSpecializationType(Name, Args.data(), 3694 Args.size()); 3695 else 3696 T = Context->getTemplateSpecializationType(Name, Args.data(), 3697 Args.size(), Underlying); 3698 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent); 3699 return T; 3700 } 3701 } 3702 // Suppress a GCC warning 3703 return QualType(); 3704} 3705 3706class clang::TypeLocReader : public TypeLocVisitor<TypeLocReader> { 3707 ASTReader &Reader; 3708 Module &F; 3709 llvm::BitstreamCursor &DeclsCursor; 3710 const ASTReader::RecordData &Record; 3711 unsigned &Idx; 3712 3713 SourceLocation ReadSourceLocation(const ASTReader::RecordData &R, 3714 unsigned &I) { 3715 return Reader.ReadSourceLocation(F, R, I); 3716 } 3717 3718 template<typename T> 3719 T *ReadDeclAs(const ASTReader::RecordData &Record, unsigned &Idx) { 3720 return Reader.ReadDeclAs<T>(F, Record, Idx); 3721 } 3722 3723public: 3724 TypeLocReader(ASTReader &Reader, Module &F, 3725 const ASTReader::RecordData &Record, unsigned &Idx) 3726 : Reader(Reader), F(F), DeclsCursor(F.DeclsCursor), Record(Record), Idx(Idx) 3727 { } 3728 3729 // We want compile-time assurance that we've enumerated all of 3730 // these, so unfortunately we have to declare them first, then 3731 // define them out-of-line. 3732#define ABSTRACT_TYPELOC(CLASS, PARENT) 3733#define TYPELOC(CLASS, PARENT) \ 3734 void Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc); 3735#include "clang/AST/TypeLocNodes.def" 3736 3737 void VisitFunctionTypeLoc(FunctionTypeLoc); 3738 void VisitArrayTypeLoc(ArrayTypeLoc); 3739}; 3740 3741void TypeLocReader::VisitQualifiedTypeLoc(QualifiedTypeLoc TL) { 3742 // nothing to do 3743} 3744void TypeLocReader::VisitBuiltinTypeLoc(BuiltinTypeLoc TL) { 3745 TL.setBuiltinLoc(ReadSourceLocation(Record, Idx)); 3746 if (TL.needsExtraLocalData()) { 3747 TL.setWrittenTypeSpec(static_cast<DeclSpec::TST>(Record[Idx++])); 3748 TL.setWrittenSignSpec(static_cast<DeclSpec::TSS>(Record[Idx++])); 3749 TL.setWrittenWidthSpec(static_cast<DeclSpec::TSW>(Record[Idx++])); 3750 TL.setModeAttr(Record[Idx++]); 3751 } 3752} 3753void TypeLocReader::VisitComplexTypeLoc(ComplexTypeLoc TL) { 3754 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3755} 3756void TypeLocReader::VisitPointerTypeLoc(PointerTypeLoc TL) { 3757 TL.setStarLoc(ReadSourceLocation(Record, Idx)); 3758} 3759void TypeLocReader::VisitBlockPointerTypeLoc(BlockPointerTypeLoc TL) { 3760 TL.setCaretLoc(ReadSourceLocation(Record, Idx)); 3761} 3762void TypeLocReader::VisitLValueReferenceTypeLoc(LValueReferenceTypeLoc TL) { 3763 TL.setAmpLoc(ReadSourceLocation(Record, Idx)); 3764} 3765void TypeLocReader::VisitRValueReferenceTypeLoc(RValueReferenceTypeLoc TL) { 3766 TL.setAmpAmpLoc(ReadSourceLocation(Record, Idx)); 3767} 3768void TypeLocReader::VisitMemberPointerTypeLoc(MemberPointerTypeLoc TL) { 3769 TL.setStarLoc(ReadSourceLocation(Record, Idx)); 3770 TL.setClassTInfo(Reader.GetTypeSourceInfo(F, Record, Idx)); 3771} 3772void TypeLocReader::VisitArrayTypeLoc(ArrayTypeLoc TL) { 3773 TL.setLBracketLoc(ReadSourceLocation(Record, Idx)); 3774 TL.setRBracketLoc(ReadSourceLocation(Record, Idx)); 3775 if (Record[Idx++]) 3776 TL.setSizeExpr(Reader.ReadExpr(F)); 3777 else 3778 TL.setSizeExpr(0); 3779} 3780void TypeLocReader::VisitConstantArrayTypeLoc(ConstantArrayTypeLoc TL) { 3781 VisitArrayTypeLoc(TL); 3782} 3783void TypeLocReader::VisitIncompleteArrayTypeLoc(IncompleteArrayTypeLoc TL) { 3784 VisitArrayTypeLoc(TL); 3785} 3786void TypeLocReader::VisitVariableArrayTypeLoc(VariableArrayTypeLoc TL) { 3787 VisitArrayTypeLoc(TL); 3788} 3789void TypeLocReader::VisitDependentSizedArrayTypeLoc( 3790 DependentSizedArrayTypeLoc TL) { 3791 VisitArrayTypeLoc(TL); 3792} 3793void TypeLocReader::VisitDependentSizedExtVectorTypeLoc( 3794 DependentSizedExtVectorTypeLoc TL) { 3795 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3796} 3797void TypeLocReader::VisitVectorTypeLoc(VectorTypeLoc TL) { 3798 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3799} 3800void TypeLocReader::VisitExtVectorTypeLoc(ExtVectorTypeLoc TL) { 3801 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3802} 3803void TypeLocReader::VisitFunctionTypeLoc(FunctionTypeLoc TL) { 3804 TL.setLocalRangeBegin(ReadSourceLocation(Record, Idx)); 3805 TL.setLocalRangeEnd(ReadSourceLocation(Record, Idx)); 3806 TL.setTrailingReturn(Record[Idx++]); 3807 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) { 3808 TL.setArg(i, ReadDeclAs<ParmVarDecl>(Record, Idx)); 3809 } 3810} 3811void TypeLocReader::VisitFunctionProtoTypeLoc(FunctionProtoTypeLoc TL) { 3812 VisitFunctionTypeLoc(TL); 3813} 3814void TypeLocReader::VisitFunctionNoProtoTypeLoc(FunctionNoProtoTypeLoc TL) { 3815 VisitFunctionTypeLoc(TL); 3816} 3817void TypeLocReader::VisitUnresolvedUsingTypeLoc(UnresolvedUsingTypeLoc TL) { 3818 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3819} 3820void TypeLocReader::VisitTypedefTypeLoc(TypedefTypeLoc TL) { 3821 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3822} 3823void TypeLocReader::VisitTypeOfExprTypeLoc(TypeOfExprTypeLoc TL) { 3824 TL.setTypeofLoc(ReadSourceLocation(Record, Idx)); 3825 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 3826 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 3827} 3828void TypeLocReader::VisitTypeOfTypeLoc(TypeOfTypeLoc TL) { 3829 TL.setTypeofLoc(ReadSourceLocation(Record, Idx)); 3830 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 3831 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 3832 TL.setUnderlyingTInfo(Reader.GetTypeSourceInfo(F, Record, Idx)); 3833} 3834void TypeLocReader::VisitDecltypeTypeLoc(DecltypeTypeLoc TL) { 3835 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3836} 3837void TypeLocReader::VisitUnaryTransformTypeLoc(UnaryTransformTypeLoc TL) { 3838 TL.setKWLoc(ReadSourceLocation(Record, Idx)); 3839 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 3840 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 3841 TL.setUnderlyingTInfo(Reader.GetTypeSourceInfo(F, Record, Idx)); 3842} 3843void TypeLocReader::VisitAutoTypeLoc(AutoTypeLoc TL) { 3844 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3845} 3846void TypeLocReader::VisitRecordTypeLoc(RecordTypeLoc TL) { 3847 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3848} 3849void TypeLocReader::VisitEnumTypeLoc(EnumTypeLoc TL) { 3850 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3851} 3852void TypeLocReader::VisitAttributedTypeLoc(AttributedTypeLoc TL) { 3853 TL.setAttrNameLoc(ReadSourceLocation(Record, Idx)); 3854 if (TL.hasAttrOperand()) { 3855 SourceRange range; 3856 range.setBegin(ReadSourceLocation(Record, Idx)); 3857 range.setEnd(ReadSourceLocation(Record, Idx)); 3858 TL.setAttrOperandParensRange(range); 3859 } 3860 if (TL.hasAttrExprOperand()) { 3861 if (Record[Idx++]) 3862 TL.setAttrExprOperand(Reader.ReadExpr(F)); 3863 else 3864 TL.setAttrExprOperand(0); 3865 } else if (TL.hasAttrEnumOperand()) 3866 TL.setAttrEnumOperandLoc(ReadSourceLocation(Record, Idx)); 3867} 3868void TypeLocReader::VisitTemplateTypeParmTypeLoc(TemplateTypeParmTypeLoc TL) { 3869 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3870} 3871void TypeLocReader::VisitSubstTemplateTypeParmTypeLoc( 3872 SubstTemplateTypeParmTypeLoc TL) { 3873 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3874} 3875void TypeLocReader::VisitSubstTemplateTypeParmPackTypeLoc( 3876 SubstTemplateTypeParmPackTypeLoc TL) { 3877 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3878} 3879void TypeLocReader::VisitTemplateSpecializationTypeLoc( 3880 TemplateSpecializationTypeLoc TL) { 3881 TL.setTemplateNameLoc(ReadSourceLocation(Record, Idx)); 3882 TL.setLAngleLoc(ReadSourceLocation(Record, Idx)); 3883 TL.setRAngleLoc(ReadSourceLocation(Record, Idx)); 3884 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 3885 TL.setArgLocInfo(i, 3886 Reader.GetTemplateArgumentLocInfo(F, 3887 TL.getTypePtr()->getArg(i).getKind(), 3888 Record, Idx)); 3889} 3890void TypeLocReader::VisitParenTypeLoc(ParenTypeLoc TL) { 3891 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 3892 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 3893} 3894void TypeLocReader::VisitElaboratedTypeLoc(ElaboratedTypeLoc TL) { 3895 TL.setKeywordLoc(ReadSourceLocation(Record, Idx)); 3896 TL.setQualifierLoc(Reader.ReadNestedNameSpecifierLoc(F, Record, Idx)); 3897} 3898void TypeLocReader::VisitInjectedClassNameTypeLoc(InjectedClassNameTypeLoc TL) { 3899 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3900} 3901void TypeLocReader::VisitDependentNameTypeLoc(DependentNameTypeLoc TL) { 3902 TL.setKeywordLoc(ReadSourceLocation(Record, Idx)); 3903 TL.setQualifierLoc(Reader.ReadNestedNameSpecifierLoc(F, Record, Idx)); 3904 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3905} 3906void TypeLocReader::VisitDependentTemplateSpecializationTypeLoc( 3907 DependentTemplateSpecializationTypeLoc TL) { 3908 TL.setKeywordLoc(ReadSourceLocation(Record, Idx)); 3909 TL.setQualifierLoc(Reader.ReadNestedNameSpecifierLoc(F, Record, Idx)); 3910 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3911 TL.setLAngleLoc(ReadSourceLocation(Record, Idx)); 3912 TL.setRAngleLoc(ReadSourceLocation(Record, Idx)); 3913 for (unsigned I = 0, E = TL.getNumArgs(); I != E; ++I) 3914 TL.setArgLocInfo(I, 3915 Reader.GetTemplateArgumentLocInfo(F, 3916 TL.getTypePtr()->getArg(I).getKind(), 3917 Record, Idx)); 3918} 3919void TypeLocReader::VisitPackExpansionTypeLoc(PackExpansionTypeLoc TL) { 3920 TL.setEllipsisLoc(ReadSourceLocation(Record, Idx)); 3921} 3922void TypeLocReader::VisitObjCInterfaceTypeLoc(ObjCInterfaceTypeLoc TL) { 3923 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3924} 3925void TypeLocReader::VisitObjCObjectTypeLoc(ObjCObjectTypeLoc TL) { 3926 TL.setHasBaseTypeAsWritten(Record[Idx++]); 3927 TL.setLAngleLoc(ReadSourceLocation(Record, Idx)); 3928 TL.setRAngleLoc(ReadSourceLocation(Record, Idx)); 3929 for (unsigned i = 0, e = TL.getNumProtocols(); i != e; ++i) 3930 TL.setProtocolLoc(i, ReadSourceLocation(Record, Idx)); 3931} 3932void TypeLocReader::VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL) { 3933 TL.setStarLoc(ReadSourceLocation(Record, Idx)); 3934} 3935 3936TypeSourceInfo *ASTReader::GetTypeSourceInfo(Module &F, 3937 const RecordData &Record, 3938 unsigned &Idx) { 3939 QualType InfoTy = readType(F, Record, Idx); 3940 if (InfoTy.isNull()) 3941 return 0; 3942 3943 TypeSourceInfo *TInfo = getContext()->CreateTypeSourceInfo(InfoTy); 3944 TypeLocReader TLR(*this, F, Record, Idx); 3945 for (TypeLoc TL = TInfo->getTypeLoc(); !TL.isNull(); TL = TL.getNextTypeLoc()) 3946 TLR.Visit(TL); 3947 return TInfo; 3948} 3949 3950QualType ASTReader::GetType(TypeID ID) { 3951 unsigned FastQuals = ID & Qualifiers::FastMask; 3952 unsigned Index = ID >> Qualifiers::FastWidth; 3953 3954 if (Index < NUM_PREDEF_TYPE_IDS) { 3955 QualType T; 3956 switch ((PredefinedTypeIDs)Index) { 3957 case PREDEF_TYPE_NULL_ID: return QualType(); 3958 case PREDEF_TYPE_VOID_ID: T = Context->VoidTy; break; 3959 case PREDEF_TYPE_BOOL_ID: T = Context->BoolTy; break; 3960 3961 case PREDEF_TYPE_CHAR_U_ID: 3962 case PREDEF_TYPE_CHAR_S_ID: 3963 // FIXME: Check that the signedness of CharTy is correct! 3964 T = Context->CharTy; 3965 break; 3966 3967 case PREDEF_TYPE_UCHAR_ID: T = Context->UnsignedCharTy; break; 3968 case PREDEF_TYPE_USHORT_ID: T = Context->UnsignedShortTy; break; 3969 case PREDEF_TYPE_UINT_ID: T = Context->UnsignedIntTy; break; 3970 case PREDEF_TYPE_ULONG_ID: T = Context->UnsignedLongTy; break; 3971 case PREDEF_TYPE_ULONGLONG_ID: T = Context->UnsignedLongLongTy; break; 3972 case PREDEF_TYPE_UINT128_ID: T = Context->UnsignedInt128Ty; break; 3973 case PREDEF_TYPE_SCHAR_ID: T = Context->SignedCharTy; break; 3974 case PREDEF_TYPE_WCHAR_ID: T = Context->WCharTy; break; 3975 case PREDEF_TYPE_SHORT_ID: T = Context->ShortTy; break; 3976 case PREDEF_TYPE_INT_ID: T = Context->IntTy; break; 3977 case PREDEF_TYPE_LONG_ID: T = Context->LongTy; break; 3978 case PREDEF_TYPE_LONGLONG_ID: T = Context->LongLongTy; break; 3979 case PREDEF_TYPE_INT128_ID: T = Context->Int128Ty; break; 3980 case PREDEF_TYPE_FLOAT_ID: T = Context->FloatTy; break; 3981 case PREDEF_TYPE_DOUBLE_ID: T = Context->DoubleTy; break; 3982 case PREDEF_TYPE_LONGDOUBLE_ID: T = Context->LongDoubleTy; break; 3983 case PREDEF_TYPE_OVERLOAD_ID: T = Context->OverloadTy; break; 3984 case PREDEF_TYPE_BOUND_MEMBER: T = Context->BoundMemberTy; break; 3985 case PREDEF_TYPE_DEPENDENT_ID: T = Context->DependentTy; break; 3986 case PREDEF_TYPE_UNKNOWN_ANY: T = Context->UnknownAnyTy; break; 3987 case PREDEF_TYPE_NULLPTR_ID: T = Context->NullPtrTy; break; 3988 case PREDEF_TYPE_CHAR16_ID: T = Context->Char16Ty; break; 3989 case PREDEF_TYPE_CHAR32_ID: T = Context->Char32Ty; break; 3990 case PREDEF_TYPE_OBJC_ID: T = Context->ObjCBuiltinIdTy; break; 3991 case PREDEF_TYPE_OBJC_CLASS: T = Context->ObjCBuiltinClassTy; break; 3992 case PREDEF_TYPE_OBJC_SEL: T = Context->ObjCBuiltinSelTy; break; 3993 } 3994 3995 assert(!T.isNull() && "Unknown predefined type"); 3996 return T.withFastQualifiers(FastQuals); 3997 } 3998 3999 Index -= NUM_PREDEF_TYPE_IDS; 4000 assert(Index < TypesLoaded.size() && "Type index out-of-range"); 4001 if (TypesLoaded[Index].isNull()) { 4002 TypesLoaded[Index] = readTypeRecord(Index); 4003 if (TypesLoaded[Index].isNull()) 4004 return QualType(); 4005 4006 TypesLoaded[Index]->setFromAST(); 4007 if (DeserializationListener) 4008 DeserializationListener->TypeRead(TypeIdx::fromTypeID(ID), 4009 TypesLoaded[Index]); 4010 } 4011 4012 return TypesLoaded[Index].withFastQualifiers(FastQuals); 4013} 4014 4015QualType ASTReader::getLocalType(Module &F, unsigned LocalID) { 4016 return GetType(getGlobalTypeID(F, LocalID)); 4017} 4018 4019serialization::TypeID 4020ASTReader::getGlobalTypeID(Module &F, unsigned LocalID) const { 4021 unsigned FastQuals = LocalID & Qualifiers::FastMask; 4022 unsigned LocalIndex = LocalID >> Qualifiers::FastWidth; 4023 4024 if (LocalIndex < NUM_PREDEF_TYPE_IDS) 4025 return LocalID; 4026 4027 ContinuousRangeMap<uint32_t, int, 2>::iterator I 4028 = F.TypeRemap.find(LocalIndex - NUM_PREDEF_TYPE_IDS); 4029 assert(I != F.TypeRemap.end() && "Invalid index into type index remap"); 4030 4031 unsigned GlobalIndex = LocalIndex + I->second; 4032 return (GlobalIndex << Qualifiers::FastWidth) | FastQuals; 4033} 4034 4035TemplateArgumentLocInfo 4036ASTReader::GetTemplateArgumentLocInfo(Module &F, 4037 TemplateArgument::ArgKind Kind, 4038 const RecordData &Record, 4039 unsigned &Index) { 4040 switch (Kind) { 4041 case TemplateArgument::Expression: 4042 return ReadExpr(F); 4043 case TemplateArgument::Type: 4044 return GetTypeSourceInfo(F, Record, Index); 4045 case TemplateArgument::Template: { 4046 NestedNameSpecifierLoc QualifierLoc = ReadNestedNameSpecifierLoc(F, Record, 4047 Index); 4048 SourceLocation TemplateNameLoc = ReadSourceLocation(F, Record, Index); 4049 return TemplateArgumentLocInfo(QualifierLoc, TemplateNameLoc, 4050 SourceLocation()); 4051 } 4052 case TemplateArgument::TemplateExpansion: { 4053 NestedNameSpecifierLoc QualifierLoc = ReadNestedNameSpecifierLoc(F, Record, 4054 Index); 4055 SourceLocation TemplateNameLoc = ReadSourceLocation(F, Record, Index); 4056 SourceLocation EllipsisLoc = ReadSourceLocation(F, Record, Index); 4057 return TemplateArgumentLocInfo(QualifierLoc, TemplateNameLoc, 4058 EllipsisLoc); 4059 } 4060 case TemplateArgument::Null: 4061 case TemplateArgument::Integral: 4062 case TemplateArgument::Declaration: 4063 case TemplateArgument::Pack: 4064 return TemplateArgumentLocInfo(); 4065 } 4066 llvm_unreachable("unexpected template argument loc"); 4067 return TemplateArgumentLocInfo(); 4068} 4069 4070TemplateArgumentLoc 4071ASTReader::ReadTemplateArgumentLoc(Module &F, 4072 const RecordData &Record, unsigned &Index) { 4073 TemplateArgument Arg = ReadTemplateArgument(F, Record, Index); 4074 4075 if (Arg.getKind() == TemplateArgument::Expression) { 4076 if (Record[Index++]) // bool InfoHasSameExpr. 4077 return TemplateArgumentLoc(Arg, TemplateArgumentLocInfo(Arg.getAsExpr())); 4078 } 4079 return TemplateArgumentLoc(Arg, GetTemplateArgumentLocInfo(F, Arg.getKind(), 4080 Record, Index)); 4081} 4082 4083Decl *ASTReader::GetExternalDecl(uint32_t ID) { 4084 return GetDecl(ID); 4085} 4086 4087uint64_t ASTReader::readCXXBaseSpecifiers(Module &M, const RecordData &Record, 4088 unsigned &Idx){ 4089 if (Idx >= Record.size()) 4090 return 0; 4091 4092 unsigned LocalID = Record[Idx++]; 4093 return getGlobalBitOffset(M, M.CXXBaseSpecifiersOffsets[LocalID - 1]); 4094} 4095 4096CXXBaseSpecifier *ASTReader::GetExternalCXXBaseSpecifiers(uint64_t Offset) { 4097 RecordLocation Loc = getLocalBitOffset(Offset); 4098 llvm::BitstreamCursor &Cursor = Loc.F->DeclsCursor; 4099 SavedStreamPosition SavedPosition(Cursor); 4100 Cursor.JumpToBit(Loc.Offset); 4101 ReadingKindTracker ReadingKind(Read_Decl, *this); 4102 RecordData Record; 4103 unsigned Code = Cursor.ReadCode(); 4104 unsigned RecCode = Cursor.ReadRecord(Code, Record); 4105 if (RecCode != DECL_CXX_BASE_SPECIFIERS) { 4106 Error("Malformed AST file: missing C++ base specifiers"); 4107 return 0; 4108 } 4109 4110 unsigned Idx = 0; 4111 unsigned NumBases = Record[Idx++]; 4112 void *Mem = Context->Allocate(sizeof(CXXBaseSpecifier) * NumBases); 4113 CXXBaseSpecifier *Bases = new (Mem) CXXBaseSpecifier [NumBases]; 4114 for (unsigned I = 0; I != NumBases; ++I) 4115 Bases[I] = ReadCXXBaseSpecifier(*Loc.F, Record, Idx); 4116 return Bases; 4117} 4118 4119TranslationUnitDecl *ASTReader::GetTranslationUnitDecl() { 4120 // FIXME: This routine might not even make sense when we're loading multiple 4121 // unrelated AST files, since we'll have to merge the translation units 4122 // somehow. 4123 unsigned TranslationUnitID = (*(ModuleMgr.end() - 1))->BaseDeclID + 1; 4124 if (!DeclsLoaded[TranslationUnitID - 1]) { 4125 ReadDeclRecord(TranslationUnitID); 4126 if (DeserializationListener) 4127 DeserializationListener->DeclRead(TranslationUnitID, 4128 DeclsLoaded[TranslationUnitID - 1]); 4129 } 4130 4131 return cast<TranslationUnitDecl>(DeclsLoaded[TranslationUnitID - 1]); 4132} 4133 4134serialization::DeclID 4135ASTReader::getGlobalDeclID(Module &F, unsigned LocalID) const { 4136 if (LocalID < NUM_PREDEF_DECL_IDS) 4137 return LocalID; 4138 4139 ContinuousRangeMap<uint32_t, int, 2>::iterator I 4140 = F.DeclRemap.find(LocalID - NUM_PREDEF_DECL_IDS); 4141 assert(I != F.DeclRemap.end() && "Invalid index into decl index remap"); 4142 4143 return LocalID + I->second; 4144} 4145 4146Decl *ASTReader::GetDecl(DeclID ID) { 4147 if (ID < NUM_PREDEF_DECL_IDS) { 4148 switch ((PredefinedDeclIDs)ID) { 4149 case serialization::PREDEF_DECL_NULL_ID: 4150 return 0; 4151 } 4152 4153 return 0; 4154 } 4155 4156 if (ID > DeclsLoaded.size()) { 4157 Error("declaration ID out-of-range for AST file"); 4158 return 0; 4159 } 4160 4161 unsigned Index = ID - NUM_PREDEF_DECL_IDS; 4162 if (!DeclsLoaded[Index]) { 4163 ReadDeclRecord(ID); 4164 if (DeserializationListener) 4165 DeserializationListener->DeclRead(ID, DeclsLoaded[Index]); 4166 } 4167 4168 return DeclsLoaded[Index]; 4169} 4170 4171serialization::DeclID ASTReader::ReadDeclID(Module &F, 4172 const RecordData &Record, 4173 unsigned &Idx) { 4174 if (Idx >= Record.size()) { 4175 Error("Corrupted AST file"); 4176 return 0; 4177 } 4178 4179 return getGlobalDeclID(F, Record[Idx++]); 4180} 4181 4182/// \brief Resolve the offset of a statement into a statement. 4183/// 4184/// This operation will read a new statement from the external 4185/// source each time it is called, and is meant to be used via a 4186/// LazyOffsetPtr (which is used by Decls for the body of functions, etc). 4187Stmt *ASTReader::GetExternalDeclStmt(uint64_t Offset) { 4188 // Switch case IDs are per Decl. 4189 ClearSwitchCaseIDs(); 4190 4191 // Offset here is a global offset across the entire chain. 4192 RecordLocation Loc = getLocalBitOffset(Offset); 4193 Loc.F->DeclsCursor.JumpToBit(Loc.Offset); 4194 return ReadStmtFromStream(*Loc.F); 4195} 4196 4197ExternalLoadResult ASTReader::FindExternalLexicalDecls(const DeclContext *DC, 4198 bool (*isKindWeWant)(Decl::Kind), 4199 SmallVectorImpl<Decl*> &Decls) { 4200 // There might be lexical decls in multiple parts of the chain, for the TU 4201 // at least. 4202 // DeclContextOffsets might reallocate as we load additional decls below, 4203 // so make a copy of the vector. 4204 DeclContextInfos Infos = DeclContextOffsets[DC]; 4205 for (DeclContextInfos::iterator I = Infos.begin(), E = Infos.end(); 4206 I != E; ++I) { 4207 // IDs can be 0 if this context doesn't contain declarations. 4208 if (!I->LexicalDecls) 4209 continue; 4210 4211 // Load all of the declaration IDs 4212 for (const KindDeclIDPair *ID = I->LexicalDecls, 4213 *IDE = ID + I->NumLexicalDecls; ID != IDE; ++ID) { 4214 if (isKindWeWant && !isKindWeWant((Decl::Kind)ID->first)) 4215 continue; 4216 4217 Decl *D = GetLocalDecl(*I->F, ID->second); 4218 assert(D && "Null decl in lexical decls"); 4219 Decls.push_back(D); 4220 } 4221 } 4222 4223 ++NumLexicalDeclContextsRead; 4224 return ELR_Success; 4225} 4226 4227DeclContext::lookup_result 4228ASTReader::FindExternalVisibleDeclsByName(const DeclContext *DC, 4229 DeclarationName Name) { 4230 assert(DC->hasExternalVisibleStorage() && 4231 "DeclContext has no visible decls in storage"); 4232 if (!Name) 4233 return DeclContext::lookup_result(DeclContext::lookup_iterator(0), 4234 DeclContext::lookup_iterator(0)); 4235 4236 SmallVector<NamedDecl *, 64> Decls; 4237 // There might be visible decls in multiple parts of the chain, for the TU 4238 // and namespaces. For any given name, the last available results replace 4239 // all earlier ones. For this reason, we walk in reverse. 4240 DeclContextInfos &Infos = DeclContextOffsets[DC]; 4241 for (DeclContextInfos::reverse_iterator I = Infos.rbegin(), E = Infos.rend(); 4242 I != E; ++I) { 4243 if (!I->NameLookupTableData) 4244 continue; 4245 4246 ASTDeclContextNameLookupTable *LookupTable = 4247 (ASTDeclContextNameLookupTable*)I->NameLookupTableData; 4248 ASTDeclContextNameLookupTable::iterator Pos = LookupTable->find(Name); 4249 if (Pos == LookupTable->end()) 4250 continue; 4251 4252 ASTDeclContextNameLookupTrait::data_type Data = *Pos; 4253 for (; Data.first != Data.second; ++Data.first) { 4254 NamedDecl *ND = GetLocalDeclAs<NamedDecl>(*I->F, *Data.first); 4255 if (!ND) 4256 continue; 4257 4258 if (ND->getDeclName() != Name) { 4259 assert(!Name.getCXXNameType().isNull() && 4260 "Name mismatch without a type"); 4261 continue; 4262 } 4263 4264 Decls.push_back(ND); 4265 } 4266 4267 // If we rejected all of the declarations we found, e.g., because the 4268 // name didn't actually match, continue looking through DeclContexts. 4269 if (Decls.empty()) 4270 continue; 4271 4272 break; 4273 } 4274 4275 ++NumVisibleDeclContextsRead; 4276 4277 SetExternalVisibleDeclsForName(DC, Name, Decls); 4278 return const_cast<DeclContext*>(DC)->lookup(Name); 4279} 4280 4281void ASTReader::MaterializeVisibleDecls(const DeclContext *DC) { 4282 assert(DC->hasExternalVisibleStorage() && 4283 "DeclContext has no visible decls in storage"); 4284 4285 SmallVector<NamedDecl *, 64> Decls; 4286 // There might be visible decls in multiple parts of the chain, for the TU 4287 // and namespaces. 4288 DeclContextInfos &Infos = DeclContextOffsets[DC]; 4289 for (DeclContextInfos::iterator I = Infos.begin(), E = Infos.end(); 4290 I != E; ++I) { 4291 if (!I->NameLookupTableData) 4292 continue; 4293 4294 ASTDeclContextNameLookupTable *LookupTable = 4295 (ASTDeclContextNameLookupTable*)I->NameLookupTableData; 4296 for (ASTDeclContextNameLookupTable::item_iterator 4297 ItemI = LookupTable->item_begin(), 4298 ItemEnd = LookupTable->item_end() ; ItemI != ItemEnd; ++ItemI) { 4299 ASTDeclContextNameLookupTable::item_iterator::value_type Val 4300 = *ItemI; 4301 ASTDeclContextNameLookupTrait::data_type Data = Val.second; 4302 Decls.clear(); 4303 for (; Data.first != Data.second; ++Data.first) 4304 Decls.push_back(GetLocalDeclAs<NamedDecl>(*I->F, *Data.first)); 4305 MaterializeVisibleDeclsForName(DC, Val.first, Decls); 4306 } 4307 } 4308} 4309 4310void ASTReader::PassInterestingDeclsToConsumer() { 4311 assert(Consumer); 4312 while (!InterestingDecls.empty()) { 4313 DeclGroupRef DG(InterestingDecls.front()); 4314 InterestingDecls.pop_front(); 4315 Consumer->HandleInterestingDecl(DG); 4316 } 4317} 4318 4319void ASTReader::StartTranslationUnit(ASTConsumer *Consumer) { 4320 this->Consumer = Consumer; 4321 4322 if (!Consumer) 4323 return; 4324 4325 for (unsigned I = 0, N = ExternalDefinitions.size(); I != N; ++I) { 4326 // Force deserialization of this decl, which will cause it to be queued for 4327 // passing to the consumer. 4328 GetDecl(ExternalDefinitions[I]); 4329 } 4330 4331 PassInterestingDeclsToConsumer(); 4332} 4333 4334void ASTReader::PrintStats() { 4335 std::fprintf(stderr, "*** AST File Statistics:\n"); 4336 4337 unsigned NumTypesLoaded 4338 = TypesLoaded.size() - std::count(TypesLoaded.begin(), TypesLoaded.end(), 4339 QualType()); 4340 unsigned NumDeclsLoaded 4341 = DeclsLoaded.size() - std::count(DeclsLoaded.begin(), DeclsLoaded.end(), 4342 (Decl *)0); 4343 unsigned NumIdentifiersLoaded 4344 = IdentifiersLoaded.size() - std::count(IdentifiersLoaded.begin(), 4345 IdentifiersLoaded.end(), 4346 (IdentifierInfo *)0); 4347 unsigned NumSelectorsLoaded 4348 = SelectorsLoaded.size() - std::count(SelectorsLoaded.begin(), 4349 SelectorsLoaded.end(), 4350 Selector()); 4351 4352 std::fprintf(stderr, " %u stat cache hits\n", NumStatHits); 4353 std::fprintf(stderr, " %u stat cache misses\n", NumStatMisses); 4354 if (unsigned TotalNumSLocEntries = getTotalNumSLocs()) 4355 std::fprintf(stderr, " %u/%u source location entries read (%f%%)\n", 4356 NumSLocEntriesRead, TotalNumSLocEntries, 4357 ((float)NumSLocEntriesRead/TotalNumSLocEntries * 100)); 4358 if (!TypesLoaded.empty()) 4359 std::fprintf(stderr, " %u/%u types read (%f%%)\n", 4360 NumTypesLoaded, (unsigned)TypesLoaded.size(), 4361 ((float)NumTypesLoaded/TypesLoaded.size() * 100)); 4362 if (!DeclsLoaded.empty()) 4363 std::fprintf(stderr, " %u/%u declarations read (%f%%)\n", 4364 NumDeclsLoaded, (unsigned)DeclsLoaded.size(), 4365 ((float)NumDeclsLoaded/DeclsLoaded.size() * 100)); 4366 if (!IdentifiersLoaded.empty()) 4367 std::fprintf(stderr, " %u/%u identifiers read (%f%%)\n", 4368 NumIdentifiersLoaded, (unsigned)IdentifiersLoaded.size(), 4369 ((float)NumIdentifiersLoaded/IdentifiersLoaded.size() * 100)); 4370 if (!SelectorsLoaded.empty()) 4371 std::fprintf(stderr, " %u/%u selectors read (%f%%)\n", 4372 NumSelectorsLoaded, (unsigned)SelectorsLoaded.size(), 4373 ((float)NumSelectorsLoaded/SelectorsLoaded.size() * 100)); 4374 if (TotalNumStatements) 4375 std::fprintf(stderr, " %u/%u statements read (%f%%)\n", 4376 NumStatementsRead, TotalNumStatements, 4377 ((float)NumStatementsRead/TotalNumStatements * 100)); 4378 if (TotalNumMacros) 4379 std::fprintf(stderr, " %u/%u macros read (%f%%)\n", 4380 NumMacrosRead, TotalNumMacros, 4381 ((float)NumMacrosRead/TotalNumMacros * 100)); 4382 if (TotalLexicalDeclContexts) 4383 std::fprintf(stderr, " %u/%u lexical declcontexts read (%f%%)\n", 4384 NumLexicalDeclContextsRead, TotalLexicalDeclContexts, 4385 ((float)NumLexicalDeclContextsRead/TotalLexicalDeclContexts 4386 * 100)); 4387 if (TotalVisibleDeclContexts) 4388 std::fprintf(stderr, " %u/%u visible declcontexts read (%f%%)\n", 4389 NumVisibleDeclContextsRead, TotalVisibleDeclContexts, 4390 ((float)NumVisibleDeclContextsRead/TotalVisibleDeclContexts 4391 * 100)); 4392 if (TotalNumMethodPoolEntries) { 4393 std::fprintf(stderr, " %u/%u method pool entries read (%f%%)\n", 4394 NumMethodPoolEntriesRead, TotalNumMethodPoolEntries, 4395 ((float)NumMethodPoolEntriesRead/TotalNumMethodPoolEntries 4396 * 100)); 4397 std::fprintf(stderr, " %u method pool misses\n", NumMethodPoolMisses); 4398 } 4399 std::fprintf(stderr, "\n"); 4400 dump(); 4401 std::fprintf(stderr, "\n"); 4402} 4403 4404template<typename Key, typename Module, unsigned InitialCapacity> 4405static void 4406dumpModuleIDMap(StringRef Name, 4407 const ContinuousRangeMap<Key, Module *, 4408 InitialCapacity> &Map) { 4409 if (Map.begin() == Map.end()) 4410 return; 4411 4412 typedef ContinuousRangeMap<Key, Module *, InitialCapacity> MapType; 4413 llvm::errs() << Name << ":\n"; 4414 for (typename MapType::const_iterator I = Map.begin(), IEnd = Map.end(); 4415 I != IEnd; ++I) { 4416 llvm::errs() << " " << I->first << " -> " << I->second->FileName 4417 << "\n"; 4418 } 4419} 4420 4421void ASTReader::dump() { 4422 llvm::errs() << "*** PCH/Module Remappings:\n"; 4423 dumpModuleIDMap("Global bit offset map", GlobalBitOffsetsMap); 4424 dumpModuleIDMap("Global source location entry map", GlobalSLocEntryMap); 4425 dumpModuleIDMap("Global type map", GlobalTypeMap); 4426 dumpModuleIDMap("Global declaration map", GlobalDeclMap); 4427 dumpModuleIDMap("Global identifier map", GlobalIdentifierMap); 4428 dumpModuleIDMap("Global selector map", GlobalSelectorMap); 4429 dumpModuleIDMap("Global macro definition map", GlobalMacroDefinitionMap); 4430 dumpModuleIDMap("Global preprocessed entity map", 4431 GlobalPreprocessedEntityMap); 4432 4433 llvm::errs() << "\n*** PCH/Modules Loaded:"; 4434 for (ModuleManager::ModuleConstIterator M = ModuleMgr.begin(), 4435 MEnd = ModuleMgr.end(); 4436 M != MEnd; ++M) 4437 (*M)->dump(); 4438} 4439 4440/// Return the amount of memory used by memory buffers, breaking down 4441/// by heap-backed versus mmap'ed memory. 4442void ASTReader::getMemoryBufferSizes(MemoryBufferSizes &sizes) const { 4443 for (ModuleConstIterator I = ModuleMgr.begin(), 4444 E = ModuleMgr.end(); I != E; ++I) { 4445 if (llvm::MemoryBuffer *buf = (*I)->Buffer.get()) { 4446 size_t bytes = buf->getBufferSize(); 4447 switch (buf->getBufferKind()) { 4448 case llvm::MemoryBuffer::MemoryBuffer_Malloc: 4449 sizes.malloc_bytes += bytes; 4450 break; 4451 case llvm::MemoryBuffer::MemoryBuffer_MMap: 4452 sizes.mmap_bytes += bytes; 4453 break; 4454 } 4455 } 4456 } 4457} 4458 4459void ASTReader::InitializeSema(Sema &S) { 4460 SemaObj = &S; 4461 S.ExternalSource = this; 4462 4463 // Makes sure any declarations that were deserialized "too early" 4464 // still get added to the identifier's declaration chains. 4465 for (unsigned I = 0, N = PreloadedDecls.size(); I != N; ++I) { 4466 if (SemaObj->TUScope) 4467 SemaObj->TUScope->AddDecl(PreloadedDecls[I]); 4468 4469 SemaObj->IdResolver.AddDecl(PreloadedDecls[I]); 4470 } 4471 PreloadedDecls.clear(); 4472 4473 // Load the offsets of the declarations that Sema references. 4474 // They will be lazily deserialized when needed. 4475 if (!SemaDeclRefs.empty()) { 4476 assert(SemaDeclRefs.size() == 2 && "More decl refs than expected!"); 4477 if (!SemaObj->StdNamespace) 4478 SemaObj->StdNamespace = SemaDeclRefs[0]; 4479 if (!SemaObj->StdBadAlloc) 4480 SemaObj->StdBadAlloc = SemaDeclRefs[1]; 4481 } 4482 4483 if (!FPPragmaOptions.empty()) { 4484 assert(FPPragmaOptions.size() == 1 && "Wrong number of FP_PRAGMA_OPTIONS"); 4485 SemaObj->FPFeatures.fp_contract = FPPragmaOptions[0]; 4486 } 4487 4488 if (!OpenCLExtensions.empty()) { 4489 unsigned I = 0; 4490#define OPENCLEXT(nm) SemaObj->OpenCLFeatures.nm = OpenCLExtensions[I++]; 4491#include "clang/Basic/OpenCLExtensions.def" 4492 4493 assert(OpenCLExtensions.size() == I && "Wrong number of OPENCL_EXTENSIONS"); 4494 } 4495} 4496 4497IdentifierInfo* ASTReader::get(const char *NameStart, const char *NameEnd) { 4498 // Try to find this name within our on-disk hash tables. We start with the 4499 // most recent one, since that one contains the most up-to-date info. 4500 for (ModuleIterator I = ModuleMgr.begin(), E = ModuleMgr.end(); I != E; ++I) { 4501 ASTIdentifierLookupTable *IdTable 4502 = (ASTIdentifierLookupTable *)(*I)->IdentifierLookupTable; 4503 if (!IdTable) 4504 continue; 4505 std::pair<const char*, unsigned> Key(NameStart, NameEnd - NameStart); 4506 ASTIdentifierLookupTable::iterator Pos = IdTable->find(Key); 4507 if (Pos == IdTable->end()) 4508 continue; 4509 4510 // Dereferencing the iterator has the effect of building the 4511 // IdentifierInfo node and populating it with the various 4512 // declarations it needs. 4513 return *Pos; 4514 } 4515 return 0; 4516} 4517 4518namespace clang { 4519 /// \brief An identifier-lookup iterator that enumerates all of the 4520 /// identifiers stored within a set of AST files. 4521 class ASTIdentifierIterator : public IdentifierIterator { 4522 /// \brief The AST reader whose identifiers are being enumerated. 4523 const ASTReader &Reader; 4524 4525 /// \brief The current index into the chain of AST files stored in 4526 /// the AST reader. 4527 unsigned Index; 4528 4529 /// \brief The current position within the identifier lookup table 4530 /// of the current AST file. 4531 ASTIdentifierLookupTable::key_iterator Current; 4532 4533 /// \brief The end position within the identifier lookup table of 4534 /// the current AST file. 4535 ASTIdentifierLookupTable::key_iterator End; 4536 4537 public: 4538 explicit ASTIdentifierIterator(const ASTReader &Reader); 4539 4540 virtual StringRef Next(); 4541 }; 4542} 4543 4544ASTIdentifierIterator::ASTIdentifierIterator(const ASTReader &Reader) 4545 : Reader(Reader), Index(Reader.ModuleMgr.size() - 1) { 4546 ASTIdentifierLookupTable *IdTable 4547 = (ASTIdentifierLookupTable *)Reader.ModuleMgr[Index].IdentifierLookupTable; 4548 Current = IdTable->key_begin(); 4549 End = IdTable->key_end(); 4550} 4551 4552StringRef ASTIdentifierIterator::Next() { 4553 while (Current == End) { 4554 // If we have exhausted all of our AST files, we're done. 4555 if (Index == 0) 4556 return StringRef(); 4557 4558 --Index; 4559 ASTIdentifierLookupTable *IdTable 4560 = (ASTIdentifierLookupTable *)Reader.ModuleMgr[Index]. 4561 IdentifierLookupTable; 4562 Current = IdTable->key_begin(); 4563 End = IdTable->key_end(); 4564 } 4565 4566 // We have any identifiers remaining in the current AST file; return 4567 // the next one. 4568 std::pair<const char*, unsigned> Key = *Current; 4569 ++Current; 4570 return StringRef(Key.first, Key.second); 4571} 4572 4573IdentifierIterator *ASTReader::getIdentifiers() const { 4574 return new ASTIdentifierIterator(*this); 4575} 4576 4577std::pair<ObjCMethodList, ObjCMethodList> 4578ASTReader::ReadMethodPool(Selector Sel) { 4579 // Find this selector in a hash table. We want to find the most recent entry. 4580 for (ModuleIterator I = ModuleMgr.begin(), E = ModuleMgr.end(); I != E; ++I) { 4581 Module &F = *(*I); 4582 if (!F.SelectorLookupTable) 4583 continue; 4584 4585 ASTSelectorLookupTable *PoolTable 4586 = (ASTSelectorLookupTable*)F.SelectorLookupTable; 4587 ASTSelectorLookupTable::iterator Pos = PoolTable->find(Sel); 4588 if (Pos != PoolTable->end()) { 4589 ++NumSelectorsRead; 4590 // FIXME: Not quite happy with the statistics here. We probably should 4591 // disable this tracking when called via LoadSelector. 4592 // Also, should entries without methods count as misses? 4593 ++NumMethodPoolEntriesRead; 4594 ASTSelectorLookupTrait::data_type Data = *Pos; 4595 if (DeserializationListener) 4596 DeserializationListener->SelectorRead(Data.ID, Sel); 4597 return std::make_pair(Data.Instance, Data.Factory); 4598 } 4599 } 4600 4601 ++NumMethodPoolMisses; 4602 return std::pair<ObjCMethodList, ObjCMethodList>(); 4603} 4604 4605void ASTReader::ReadKnownNamespaces( 4606 SmallVectorImpl<NamespaceDecl *> &Namespaces) { 4607 Namespaces.clear(); 4608 4609 for (unsigned I = 0, N = KnownNamespaces.size(); I != N; ++I) { 4610 if (NamespaceDecl *Namespace 4611 = dyn_cast_or_null<NamespaceDecl>(GetDecl(KnownNamespaces[I]))) 4612 Namespaces.push_back(Namespace); 4613 } 4614} 4615 4616void ASTReader::ReadTentativeDefinitions( 4617 SmallVectorImpl<VarDecl *> &TentativeDefs) { 4618 for (unsigned I = 0, N = TentativeDefinitions.size(); I != N; ++I) { 4619 VarDecl *Var = dyn_cast_or_null<VarDecl>(GetDecl(TentativeDefinitions[I])); 4620 if (Var) 4621 TentativeDefs.push_back(Var); 4622 } 4623 TentativeDefinitions.clear(); 4624} 4625 4626void ASTReader::ReadUnusedFileScopedDecls( 4627 SmallVectorImpl<const DeclaratorDecl *> &Decls) { 4628 for (unsigned I = 0, N = UnusedFileScopedDecls.size(); I != N; ++I) { 4629 DeclaratorDecl *D 4630 = dyn_cast_or_null<DeclaratorDecl>(GetDecl(UnusedFileScopedDecls[I])); 4631 if (D) 4632 Decls.push_back(D); 4633 } 4634 UnusedFileScopedDecls.clear(); 4635} 4636 4637void ASTReader::ReadDelegatingConstructors( 4638 SmallVectorImpl<CXXConstructorDecl *> &Decls) { 4639 for (unsigned I = 0, N = DelegatingCtorDecls.size(); I != N; ++I) { 4640 CXXConstructorDecl *D 4641 = dyn_cast_or_null<CXXConstructorDecl>(GetDecl(DelegatingCtorDecls[I])); 4642 if (D) 4643 Decls.push_back(D); 4644 } 4645 DelegatingCtorDecls.clear(); 4646} 4647 4648void ASTReader::ReadExtVectorDecls(SmallVectorImpl<TypedefNameDecl *> &Decls) { 4649 for (unsigned I = 0, N = ExtVectorDecls.size(); I != N; ++I) { 4650 TypedefNameDecl *D 4651 = dyn_cast_or_null<TypedefNameDecl>(GetDecl(ExtVectorDecls[I])); 4652 if (D) 4653 Decls.push_back(D); 4654 } 4655 ExtVectorDecls.clear(); 4656} 4657 4658void ASTReader::ReadDynamicClasses(SmallVectorImpl<CXXRecordDecl *> &Decls) { 4659 for (unsigned I = 0, N = DynamicClasses.size(); I != N; ++I) { 4660 CXXRecordDecl *D 4661 = dyn_cast_or_null<CXXRecordDecl>(GetDecl(DynamicClasses[I])); 4662 if (D) 4663 Decls.push_back(D); 4664 } 4665 DynamicClasses.clear(); 4666} 4667 4668void 4669ASTReader::ReadLocallyScopedExternalDecls(SmallVectorImpl<NamedDecl *> &Decls) { 4670 for (unsigned I = 0, N = LocallyScopedExternalDecls.size(); I != N; ++I) { 4671 NamedDecl *D 4672 = dyn_cast_or_null<NamedDecl>(GetDecl(LocallyScopedExternalDecls[I])); 4673 if (D) 4674 Decls.push_back(D); 4675 } 4676 LocallyScopedExternalDecls.clear(); 4677} 4678 4679void ASTReader::ReadReferencedSelectors( 4680 SmallVectorImpl<std::pair<Selector, SourceLocation> > &Sels) { 4681 if (ReferencedSelectorsData.empty()) 4682 return; 4683 4684 // If there are @selector references added them to its pool. This is for 4685 // implementation of -Wselector. 4686 unsigned int DataSize = ReferencedSelectorsData.size()-1; 4687 unsigned I = 0; 4688 while (I < DataSize) { 4689 Selector Sel = DecodeSelector(ReferencedSelectorsData[I++]); 4690 SourceLocation SelLoc 4691 = SourceLocation::getFromRawEncoding(ReferencedSelectorsData[I++]); 4692 Sels.push_back(std::make_pair(Sel, SelLoc)); 4693 } 4694 ReferencedSelectorsData.clear(); 4695} 4696 4697void ASTReader::ReadWeakUndeclaredIdentifiers( 4698 SmallVectorImpl<std::pair<IdentifierInfo *, WeakInfo> > &WeakIDs) { 4699 if (WeakUndeclaredIdentifiers.empty()) 4700 return; 4701 4702 for (unsigned I = 0, N = WeakUndeclaredIdentifiers.size(); I < N; /*none*/) { 4703 IdentifierInfo *WeakId 4704 = DecodeIdentifierInfo(WeakUndeclaredIdentifiers[I++]); 4705 IdentifierInfo *AliasId 4706 = DecodeIdentifierInfo(WeakUndeclaredIdentifiers[I++]); 4707 SourceLocation Loc 4708 = SourceLocation::getFromRawEncoding(WeakUndeclaredIdentifiers[I++]); 4709 bool Used = WeakUndeclaredIdentifiers[I++]; 4710 WeakInfo WI(AliasId, Loc); 4711 WI.setUsed(Used); 4712 WeakIDs.push_back(std::make_pair(WeakId, WI)); 4713 } 4714 WeakUndeclaredIdentifiers.clear(); 4715} 4716 4717void ASTReader::ReadUsedVTables(SmallVectorImpl<ExternalVTableUse> &VTables) { 4718 for (unsigned Idx = 0, N = VTableUses.size(); Idx < N; /* In loop */) { 4719 ExternalVTableUse VT; 4720 VT.Record = dyn_cast_or_null<CXXRecordDecl>(GetDecl(VTableUses[Idx++])); 4721 VT.Location = SourceLocation::getFromRawEncoding(VTableUses[Idx++]); 4722 VT.DefinitionRequired = VTableUses[Idx++]; 4723 VTables.push_back(VT); 4724 } 4725 4726 VTableUses.clear(); 4727} 4728 4729void ASTReader::ReadPendingInstantiations( 4730 SmallVectorImpl<std::pair<ValueDecl *, SourceLocation> > &Pending) { 4731 for (unsigned Idx = 0, N = PendingInstantiations.size(); Idx < N;) { 4732 ValueDecl *D = cast<ValueDecl>(GetDecl(PendingInstantiations[Idx++])); 4733 SourceLocation Loc 4734 = SourceLocation::getFromRawEncoding(PendingInstantiations[Idx++]); 4735 Pending.push_back(std::make_pair(D, Loc)); 4736 } 4737 PendingInstantiations.clear(); 4738} 4739 4740void ASTReader::LoadSelector(Selector Sel) { 4741 // It would be complicated to avoid reading the methods anyway. So don't. 4742 ReadMethodPool(Sel); 4743} 4744 4745void ASTReader::SetIdentifierInfo(IdentifierID ID, IdentifierInfo *II) { 4746 assert(ID && "Non-zero identifier ID required"); 4747 assert(ID <= IdentifiersLoaded.size() && "identifier ID out of range"); 4748 IdentifiersLoaded[ID - 1] = II; 4749 if (DeserializationListener) 4750 DeserializationListener->IdentifierRead(ID, II); 4751} 4752 4753/// \brief Set the globally-visible declarations associated with the given 4754/// identifier. 4755/// 4756/// If the AST reader is currently in a state where the given declaration IDs 4757/// cannot safely be resolved, they are queued until it is safe to resolve 4758/// them. 4759/// 4760/// \param II an IdentifierInfo that refers to one or more globally-visible 4761/// declarations. 4762/// 4763/// \param DeclIDs the set of declaration IDs with the name @p II that are 4764/// visible at global scope. 4765/// 4766/// \param Nonrecursive should be true to indicate that the caller knows that 4767/// this call is non-recursive, and therefore the globally-visible declarations 4768/// will not be placed onto the pending queue. 4769void 4770ASTReader::SetGloballyVisibleDecls(IdentifierInfo *II, 4771 const SmallVectorImpl<uint32_t> &DeclIDs, 4772 bool Nonrecursive) { 4773 if (NumCurrentElementsDeserializing && !Nonrecursive) { 4774 PendingIdentifierInfos.push_back(PendingIdentifierInfo()); 4775 PendingIdentifierInfo &PII = PendingIdentifierInfos.back(); 4776 PII.II = II; 4777 PII.DeclIDs.append(DeclIDs.begin(), DeclIDs.end()); 4778 return; 4779 } 4780 4781 for (unsigned I = 0, N = DeclIDs.size(); I != N; ++I) { 4782 NamedDecl *D = cast<NamedDecl>(GetDecl(DeclIDs[I])); 4783 if (SemaObj) { 4784 if (SemaObj->TUScope) { 4785 // Introduce this declaration into the translation-unit scope 4786 // and add it to the declaration chain for this identifier, so 4787 // that (unqualified) name lookup will find it. 4788 SemaObj->TUScope->AddDecl(D); 4789 } 4790 SemaObj->IdResolver.AddDeclToIdentifierChain(II, D); 4791 } else { 4792 // Queue this declaration so that it will be added to the 4793 // translation unit scope and identifier's declaration chain 4794 // once a Sema object is known. 4795 PreloadedDecls.push_back(D); 4796 } 4797 } 4798} 4799 4800IdentifierInfo *ASTReader::DecodeIdentifierInfo(IdentifierID ID) { 4801 if (ID == 0) 4802 return 0; 4803 4804 if (IdentifiersLoaded.empty()) { 4805 Error("no identifier table in AST file"); 4806 return 0; 4807 } 4808 4809 assert(PP && "Forgot to set Preprocessor ?"); 4810 ID -= 1; 4811 if (!IdentifiersLoaded[ID]) { 4812 GlobalIdentifierMapType::iterator I = GlobalIdentifierMap.find(ID + 1); 4813 assert(I != GlobalIdentifierMap.end() && "Corrupted global identifier map"); 4814 Module *M = I->second; 4815 unsigned Index = ID - M->BaseIdentifierID; 4816 const char *Str = M->IdentifierTableData + M->IdentifierOffsets[Index]; 4817 4818 // All of the strings in the AST file are preceded by a 16-bit length. 4819 // Extract that 16-bit length to avoid having to execute strlen(). 4820 // NOTE: 'StrLenPtr' is an 'unsigned char*' so that we load bytes as 4821 // unsigned integers. This is important to avoid integer overflow when 4822 // we cast them to 'unsigned'. 4823 const unsigned char *StrLenPtr = (const unsigned char*) Str - 2; 4824 unsigned StrLen = (((unsigned) StrLenPtr[0]) 4825 | (((unsigned) StrLenPtr[1]) << 8)) - 1; 4826 IdentifiersLoaded[ID] 4827 = &PP->getIdentifierTable().get(StringRef(Str, StrLen)); 4828 if (DeserializationListener) 4829 DeserializationListener->IdentifierRead(ID + 1, IdentifiersLoaded[ID]); 4830 } 4831 4832 return IdentifiersLoaded[ID]; 4833} 4834 4835IdentifierInfo *ASTReader::getLocalIdentifier(Module &M, unsigned LocalID) { 4836 return DecodeIdentifierInfo(getGlobalIdentifierID(M, LocalID)); 4837} 4838 4839IdentifierID ASTReader::getGlobalIdentifierID(Module &M, unsigned LocalID) { 4840 if (LocalID < NUM_PREDEF_IDENT_IDS) 4841 return LocalID; 4842 4843 ContinuousRangeMap<uint32_t, int, 2>::iterator I 4844 = M.IdentifierRemap.find(LocalID - NUM_PREDEF_IDENT_IDS); 4845 assert(I != M.IdentifierRemap.end() 4846 && "Invalid index into identifier index remap"); 4847 4848 return LocalID + I->second; 4849} 4850 4851bool ASTReader::ReadSLocEntry(int ID) { 4852 return ReadSLocEntryRecord(ID) != Success; 4853} 4854 4855Selector ASTReader::getLocalSelector(Module &M, unsigned LocalID) { 4856 return DecodeSelector(getGlobalSelectorID(M, LocalID)); 4857} 4858 4859Selector ASTReader::DecodeSelector(serialization::SelectorID ID) { 4860 if (ID == 0) 4861 return Selector(); 4862 4863 if (ID > SelectorsLoaded.size()) { 4864 Error("selector ID out of range in AST file"); 4865 return Selector(); 4866 } 4867 4868 if (SelectorsLoaded[ID - 1].getAsOpaquePtr() == 0) { 4869 // Load this selector from the selector table. 4870 GlobalSelectorMapType::iterator I = GlobalSelectorMap.find(ID); 4871 assert(I != GlobalSelectorMap.end() && "Corrupted global selector map"); 4872 Module &M = *I->second; 4873 ASTSelectorLookupTrait Trait(*this, M); 4874 unsigned Idx = ID - M.BaseSelectorID - NUM_PREDEF_SELECTOR_IDS; 4875 SelectorsLoaded[ID - 1] = 4876 Trait.ReadKey(M.SelectorLookupTableData + M.SelectorOffsets[Idx], 0); 4877 if (DeserializationListener) 4878 DeserializationListener->SelectorRead(ID, SelectorsLoaded[ID - 1]); 4879 } 4880 4881 return SelectorsLoaded[ID - 1]; 4882} 4883 4884Selector ASTReader::GetExternalSelector(serialization::SelectorID ID) { 4885 return DecodeSelector(ID); 4886} 4887 4888uint32_t ASTReader::GetNumExternalSelectors() { 4889 // ID 0 (the null selector) is considered an external selector. 4890 return getTotalNumSelectors() + 1; 4891} 4892 4893serialization::SelectorID 4894ASTReader::getGlobalSelectorID(Module &M, unsigned LocalID) const { 4895 if (LocalID < NUM_PREDEF_SELECTOR_IDS) 4896 return LocalID; 4897 4898 ContinuousRangeMap<uint32_t, int, 2>::iterator I 4899 = M.SelectorRemap.find(LocalID - NUM_PREDEF_SELECTOR_IDS); 4900 assert(I != M.SelectorRemap.end() 4901 && "Invalid index into identifier index remap"); 4902 4903 return LocalID + I->second; 4904} 4905 4906DeclarationName 4907ASTReader::ReadDeclarationName(Module &F, 4908 const RecordData &Record, unsigned &Idx) { 4909 DeclarationName::NameKind Kind = (DeclarationName::NameKind)Record[Idx++]; 4910 switch (Kind) { 4911 case DeclarationName::Identifier: 4912 return DeclarationName(GetIdentifierInfo(F, Record, Idx)); 4913 4914 case DeclarationName::ObjCZeroArgSelector: 4915 case DeclarationName::ObjCOneArgSelector: 4916 case DeclarationName::ObjCMultiArgSelector: 4917 return DeclarationName(ReadSelector(F, Record, Idx)); 4918 4919 case DeclarationName::CXXConstructorName: 4920 return Context->DeclarationNames.getCXXConstructorName( 4921 Context->getCanonicalType(readType(F, Record, Idx))); 4922 4923 case DeclarationName::CXXDestructorName: 4924 return Context->DeclarationNames.getCXXDestructorName( 4925 Context->getCanonicalType(readType(F, Record, Idx))); 4926 4927 case DeclarationName::CXXConversionFunctionName: 4928 return Context->DeclarationNames.getCXXConversionFunctionName( 4929 Context->getCanonicalType(readType(F, Record, Idx))); 4930 4931 case DeclarationName::CXXOperatorName: 4932 return Context->DeclarationNames.getCXXOperatorName( 4933 (OverloadedOperatorKind)Record[Idx++]); 4934 4935 case DeclarationName::CXXLiteralOperatorName: 4936 return Context->DeclarationNames.getCXXLiteralOperatorName( 4937 GetIdentifierInfo(F, Record, Idx)); 4938 4939 case DeclarationName::CXXUsingDirective: 4940 return DeclarationName::getUsingDirectiveName(); 4941 } 4942 4943 // Required to silence GCC warning 4944 return DeclarationName(); 4945} 4946 4947void ASTReader::ReadDeclarationNameLoc(Module &F, 4948 DeclarationNameLoc &DNLoc, 4949 DeclarationName Name, 4950 const RecordData &Record, unsigned &Idx) { 4951 switch (Name.getNameKind()) { 4952 case DeclarationName::CXXConstructorName: 4953 case DeclarationName::CXXDestructorName: 4954 case DeclarationName::CXXConversionFunctionName: 4955 DNLoc.NamedType.TInfo = GetTypeSourceInfo(F, Record, Idx); 4956 break; 4957 4958 case DeclarationName::CXXOperatorName: 4959 DNLoc.CXXOperatorName.BeginOpNameLoc 4960 = ReadSourceLocation(F, Record, Idx).getRawEncoding(); 4961 DNLoc.CXXOperatorName.EndOpNameLoc 4962 = ReadSourceLocation(F, Record, Idx).getRawEncoding(); 4963 break; 4964 4965 case DeclarationName::CXXLiteralOperatorName: 4966 DNLoc.CXXLiteralOperatorName.OpNameLoc 4967 = ReadSourceLocation(F, Record, Idx).getRawEncoding(); 4968 break; 4969 4970 case DeclarationName::Identifier: 4971 case DeclarationName::ObjCZeroArgSelector: 4972 case DeclarationName::ObjCOneArgSelector: 4973 case DeclarationName::ObjCMultiArgSelector: 4974 case DeclarationName::CXXUsingDirective: 4975 break; 4976 } 4977} 4978 4979void ASTReader::ReadDeclarationNameInfo(Module &F, 4980 DeclarationNameInfo &NameInfo, 4981 const RecordData &Record, unsigned &Idx) { 4982 NameInfo.setName(ReadDeclarationName(F, Record, Idx)); 4983 NameInfo.setLoc(ReadSourceLocation(F, Record, Idx)); 4984 DeclarationNameLoc DNLoc; 4985 ReadDeclarationNameLoc(F, DNLoc, NameInfo.getName(), Record, Idx); 4986 NameInfo.setInfo(DNLoc); 4987} 4988 4989void ASTReader::ReadQualifierInfo(Module &F, QualifierInfo &Info, 4990 const RecordData &Record, unsigned &Idx) { 4991 Info.QualifierLoc = ReadNestedNameSpecifierLoc(F, Record, Idx); 4992 unsigned NumTPLists = Record[Idx++]; 4993 Info.NumTemplParamLists = NumTPLists; 4994 if (NumTPLists) { 4995 Info.TemplParamLists = new (*Context) TemplateParameterList*[NumTPLists]; 4996 for (unsigned i=0; i != NumTPLists; ++i) 4997 Info.TemplParamLists[i] = ReadTemplateParameterList(F, Record, Idx); 4998 } 4999} 5000 5001TemplateName 5002ASTReader::ReadTemplateName(Module &F, const RecordData &Record, 5003 unsigned &Idx) { 5004 TemplateName::NameKind Kind = (TemplateName::NameKind)Record[Idx++]; 5005 switch (Kind) { 5006 case TemplateName::Template: 5007 return TemplateName(ReadDeclAs<TemplateDecl>(F, Record, Idx)); 5008 5009 case TemplateName::OverloadedTemplate: { 5010 unsigned size = Record[Idx++]; 5011 UnresolvedSet<8> Decls; 5012 while (size--) 5013 Decls.addDecl(ReadDeclAs<NamedDecl>(F, Record, Idx)); 5014 5015 return Context->getOverloadedTemplateName(Decls.begin(), Decls.end()); 5016 } 5017 5018 case TemplateName::QualifiedTemplate: { 5019 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(F, Record, Idx); 5020 bool hasTemplKeyword = Record[Idx++]; 5021 TemplateDecl *Template = ReadDeclAs<TemplateDecl>(F, Record, Idx); 5022 return Context->getQualifiedTemplateName(NNS, hasTemplKeyword, Template); 5023 } 5024 5025 case TemplateName::DependentTemplate: { 5026 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(F, Record, Idx); 5027 if (Record[Idx++]) // isIdentifier 5028 return Context->getDependentTemplateName(NNS, 5029 GetIdentifierInfo(F, Record, 5030 Idx)); 5031 return Context->getDependentTemplateName(NNS, 5032 (OverloadedOperatorKind)Record[Idx++]); 5033 } 5034 5035 case TemplateName::SubstTemplateTemplateParm: { 5036 TemplateTemplateParmDecl *param 5037 = ReadDeclAs<TemplateTemplateParmDecl>(F, Record, Idx); 5038 if (!param) return TemplateName(); 5039 TemplateName replacement = ReadTemplateName(F, Record, Idx); 5040 return Context->getSubstTemplateTemplateParm(param, replacement); 5041 } 5042 5043 case TemplateName::SubstTemplateTemplateParmPack: { 5044 TemplateTemplateParmDecl *Param 5045 = ReadDeclAs<TemplateTemplateParmDecl>(F, Record, Idx); 5046 if (!Param) 5047 return TemplateName(); 5048 5049 TemplateArgument ArgPack = ReadTemplateArgument(F, Record, Idx); 5050 if (ArgPack.getKind() != TemplateArgument::Pack) 5051 return TemplateName(); 5052 5053 return Context->getSubstTemplateTemplateParmPack(Param, ArgPack); 5054 } 5055 } 5056 5057 assert(0 && "Unhandled template name kind!"); 5058 return TemplateName(); 5059} 5060 5061TemplateArgument 5062ASTReader::ReadTemplateArgument(Module &F, 5063 const RecordData &Record, unsigned &Idx) { 5064 TemplateArgument::ArgKind Kind = (TemplateArgument::ArgKind)Record[Idx++]; 5065 switch (Kind) { 5066 case TemplateArgument::Null: 5067 return TemplateArgument(); 5068 case TemplateArgument::Type: 5069 return TemplateArgument(readType(F, Record, Idx)); 5070 case TemplateArgument::Declaration: 5071 return TemplateArgument(ReadDecl(F, Record, Idx)); 5072 case TemplateArgument::Integral: { 5073 llvm::APSInt Value = ReadAPSInt(Record, Idx); 5074 QualType T = readType(F, Record, Idx); 5075 return TemplateArgument(Value, T); 5076 } 5077 case TemplateArgument::Template: 5078 return TemplateArgument(ReadTemplateName(F, Record, Idx)); 5079 case TemplateArgument::TemplateExpansion: { 5080 TemplateName Name = ReadTemplateName(F, Record, Idx); 5081 llvm::Optional<unsigned> NumTemplateExpansions; 5082 if (unsigned NumExpansions = Record[Idx++]) 5083 NumTemplateExpansions = NumExpansions - 1; 5084 return TemplateArgument(Name, NumTemplateExpansions); 5085 } 5086 case TemplateArgument::Expression: 5087 return TemplateArgument(ReadExpr(F)); 5088 case TemplateArgument::Pack: { 5089 unsigned NumArgs = Record[Idx++]; 5090 TemplateArgument *Args = new (*Context) TemplateArgument[NumArgs]; 5091 for (unsigned I = 0; I != NumArgs; ++I) 5092 Args[I] = ReadTemplateArgument(F, Record, Idx); 5093 return TemplateArgument(Args, NumArgs); 5094 } 5095 } 5096 5097 assert(0 && "Unhandled template argument kind!"); 5098 return TemplateArgument(); 5099} 5100 5101TemplateParameterList * 5102ASTReader::ReadTemplateParameterList(Module &F, 5103 const RecordData &Record, unsigned &Idx) { 5104 SourceLocation TemplateLoc = ReadSourceLocation(F, Record, Idx); 5105 SourceLocation LAngleLoc = ReadSourceLocation(F, Record, Idx); 5106 SourceLocation RAngleLoc = ReadSourceLocation(F, Record, Idx); 5107 5108 unsigned NumParams = Record[Idx++]; 5109 SmallVector<NamedDecl *, 16> Params; 5110 Params.reserve(NumParams); 5111 while (NumParams--) 5112 Params.push_back(ReadDeclAs<NamedDecl>(F, Record, Idx)); 5113 5114 TemplateParameterList* TemplateParams = 5115 TemplateParameterList::Create(*Context, TemplateLoc, LAngleLoc, 5116 Params.data(), Params.size(), RAngleLoc); 5117 return TemplateParams; 5118} 5119 5120void 5121ASTReader:: 5122ReadTemplateArgumentList(SmallVector<TemplateArgument, 8> &TemplArgs, 5123 Module &F, const RecordData &Record, 5124 unsigned &Idx) { 5125 unsigned NumTemplateArgs = Record[Idx++]; 5126 TemplArgs.reserve(NumTemplateArgs); 5127 while (NumTemplateArgs--) 5128 TemplArgs.push_back(ReadTemplateArgument(F, Record, Idx)); 5129} 5130 5131/// \brief Read a UnresolvedSet structure. 5132void ASTReader::ReadUnresolvedSet(Module &F, UnresolvedSetImpl &Set, 5133 const RecordData &Record, unsigned &Idx) { 5134 unsigned NumDecls = Record[Idx++]; 5135 while (NumDecls--) { 5136 NamedDecl *D = ReadDeclAs<NamedDecl>(F, Record, Idx); 5137 AccessSpecifier AS = (AccessSpecifier)Record[Idx++]; 5138 Set.addDecl(D, AS); 5139 } 5140} 5141 5142CXXBaseSpecifier 5143ASTReader::ReadCXXBaseSpecifier(Module &F, 5144 const RecordData &Record, unsigned &Idx) { 5145 bool isVirtual = static_cast<bool>(Record[Idx++]); 5146 bool isBaseOfClass = static_cast<bool>(Record[Idx++]); 5147 AccessSpecifier AS = static_cast<AccessSpecifier>(Record[Idx++]); 5148 bool inheritConstructors = static_cast<bool>(Record[Idx++]); 5149 TypeSourceInfo *TInfo = GetTypeSourceInfo(F, Record, Idx); 5150 SourceRange Range = ReadSourceRange(F, Record, Idx); 5151 SourceLocation EllipsisLoc = ReadSourceLocation(F, Record, Idx); 5152 CXXBaseSpecifier Result(Range, isVirtual, isBaseOfClass, AS, TInfo, 5153 EllipsisLoc); 5154 Result.setInheritConstructors(inheritConstructors); 5155 return Result; 5156} 5157 5158std::pair<CXXCtorInitializer **, unsigned> 5159ASTReader::ReadCXXCtorInitializers(Module &F, const RecordData &Record, 5160 unsigned &Idx) { 5161 CXXCtorInitializer **CtorInitializers = 0; 5162 unsigned NumInitializers = Record[Idx++]; 5163 if (NumInitializers) { 5164 ASTContext &C = *getContext(); 5165 5166 CtorInitializers 5167 = new (C) CXXCtorInitializer*[NumInitializers]; 5168 for (unsigned i=0; i != NumInitializers; ++i) { 5169 TypeSourceInfo *BaseClassInfo = 0; 5170 bool IsBaseVirtual = false; 5171 FieldDecl *Member = 0; 5172 IndirectFieldDecl *IndirectMember = 0; 5173 CXXConstructorDecl *Target = 0; 5174 5175 CtorInitializerType Type = (CtorInitializerType)Record[Idx++]; 5176 switch (Type) { 5177 case CTOR_INITIALIZER_BASE: 5178 BaseClassInfo = GetTypeSourceInfo(F, Record, Idx); 5179 IsBaseVirtual = Record[Idx++]; 5180 break; 5181 5182 case CTOR_INITIALIZER_DELEGATING: 5183 Target = ReadDeclAs<CXXConstructorDecl>(F, Record, Idx); 5184 break; 5185 5186 case CTOR_INITIALIZER_MEMBER: 5187 Member = ReadDeclAs<FieldDecl>(F, Record, Idx); 5188 break; 5189 5190 case CTOR_INITIALIZER_INDIRECT_MEMBER: 5191 IndirectMember = ReadDeclAs<IndirectFieldDecl>(F, Record, Idx); 5192 break; 5193 } 5194 5195 SourceLocation MemberOrEllipsisLoc = ReadSourceLocation(F, Record, Idx); 5196 Expr *Init = ReadExpr(F); 5197 SourceLocation LParenLoc = ReadSourceLocation(F, Record, Idx); 5198 SourceLocation RParenLoc = ReadSourceLocation(F, Record, Idx); 5199 bool IsWritten = Record[Idx++]; 5200 unsigned SourceOrderOrNumArrayIndices; 5201 SmallVector<VarDecl *, 8> Indices; 5202 if (IsWritten) { 5203 SourceOrderOrNumArrayIndices = Record[Idx++]; 5204 } else { 5205 SourceOrderOrNumArrayIndices = Record[Idx++]; 5206 Indices.reserve(SourceOrderOrNumArrayIndices); 5207 for (unsigned i=0; i != SourceOrderOrNumArrayIndices; ++i) 5208 Indices.push_back(ReadDeclAs<VarDecl>(F, Record, Idx)); 5209 } 5210 5211 CXXCtorInitializer *BOMInit; 5212 if (Type == CTOR_INITIALIZER_BASE) { 5213 BOMInit = new (C) CXXCtorInitializer(C, BaseClassInfo, IsBaseVirtual, 5214 LParenLoc, Init, RParenLoc, 5215 MemberOrEllipsisLoc); 5216 } else if (Type == CTOR_INITIALIZER_DELEGATING) { 5217 BOMInit = new (C) CXXCtorInitializer(C, MemberOrEllipsisLoc, LParenLoc, 5218 Target, Init, RParenLoc); 5219 } else if (IsWritten) { 5220 if (Member) 5221 BOMInit = new (C) CXXCtorInitializer(C, Member, MemberOrEllipsisLoc, 5222 LParenLoc, Init, RParenLoc); 5223 else 5224 BOMInit = new (C) CXXCtorInitializer(C, IndirectMember, 5225 MemberOrEllipsisLoc, LParenLoc, 5226 Init, RParenLoc); 5227 } else { 5228 BOMInit = CXXCtorInitializer::Create(C, Member, MemberOrEllipsisLoc, 5229 LParenLoc, Init, RParenLoc, 5230 Indices.data(), Indices.size()); 5231 } 5232 5233 if (IsWritten) 5234 BOMInit->setSourceOrder(SourceOrderOrNumArrayIndices); 5235 CtorInitializers[i] = BOMInit; 5236 } 5237 } 5238 5239 return std::make_pair(CtorInitializers, NumInitializers); 5240} 5241 5242NestedNameSpecifier * 5243ASTReader::ReadNestedNameSpecifier(Module &F, 5244 const RecordData &Record, unsigned &Idx) { 5245 unsigned N = Record[Idx++]; 5246 NestedNameSpecifier *NNS = 0, *Prev = 0; 5247 for (unsigned I = 0; I != N; ++I) { 5248 NestedNameSpecifier::SpecifierKind Kind 5249 = (NestedNameSpecifier::SpecifierKind)Record[Idx++]; 5250 switch (Kind) { 5251 case NestedNameSpecifier::Identifier: { 5252 IdentifierInfo *II = GetIdentifierInfo(F, Record, Idx); 5253 NNS = NestedNameSpecifier::Create(*Context, Prev, II); 5254 break; 5255 } 5256 5257 case NestedNameSpecifier::Namespace: { 5258 NamespaceDecl *NS = ReadDeclAs<NamespaceDecl>(F, Record, Idx); 5259 NNS = NestedNameSpecifier::Create(*Context, Prev, NS); 5260 break; 5261 } 5262 5263 case NestedNameSpecifier::NamespaceAlias: { 5264 NamespaceAliasDecl *Alias =ReadDeclAs<NamespaceAliasDecl>(F, Record, Idx); 5265 NNS = NestedNameSpecifier::Create(*Context, Prev, Alias); 5266 break; 5267 } 5268 5269 case NestedNameSpecifier::TypeSpec: 5270 case NestedNameSpecifier::TypeSpecWithTemplate: { 5271 const Type *T = readType(F, Record, Idx).getTypePtrOrNull(); 5272 if (!T) 5273 return 0; 5274 5275 bool Template = Record[Idx++]; 5276 NNS = NestedNameSpecifier::Create(*Context, Prev, Template, T); 5277 break; 5278 } 5279 5280 case NestedNameSpecifier::Global: { 5281 NNS = NestedNameSpecifier::GlobalSpecifier(*Context); 5282 // No associated value, and there can't be a prefix. 5283 break; 5284 } 5285 } 5286 Prev = NNS; 5287 } 5288 return NNS; 5289} 5290 5291NestedNameSpecifierLoc 5292ASTReader::ReadNestedNameSpecifierLoc(Module &F, const RecordData &Record, 5293 unsigned &Idx) { 5294 unsigned N = Record[Idx++]; 5295 NestedNameSpecifierLocBuilder Builder; 5296 for (unsigned I = 0; I != N; ++I) { 5297 NestedNameSpecifier::SpecifierKind Kind 5298 = (NestedNameSpecifier::SpecifierKind)Record[Idx++]; 5299 switch (Kind) { 5300 case NestedNameSpecifier::Identifier: { 5301 IdentifierInfo *II = GetIdentifierInfo(F, Record, Idx); 5302 SourceRange Range = ReadSourceRange(F, Record, Idx); 5303 Builder.Extend(*Context, II, Range.getBegin(), Range.getEnd()); 5304 break; 5305 } 5306 5307 case NestedNameSpecifier::Namespace: { 5308 NamespaceDecl *NS = ReadDeclAs<NamespaceDecl>(F, Record, Idx); 5309 SourceRange Range = ReadSourceRange(F, Record, Idx); 5310 Builder.Extend(*Context, NS, Range.getBegin(), Range.getEnd()); 5311 break; 5312 } 5313 5314 case NestedNameSpecifier::NamespaceAlias: { 5315 NamespaceAliasDecl *Alias =ReadDeclAs<NamespaceAliasDecl>(F, Record, Idx); 5316 SourceRange Range = ReadSourceRange(F, Record, Idx); 5317 Builder.Extend(*Context, Alias, Range.getBegin(), Range.getEnd()); 5318 break; 5319 } 5320 5321 case NestedNameSpecifier::TypeSpec: 5322 case NestedNameSpecifier::TypeSpecWithTemplate: { 5323 bool Template = Record[Idx++]; 5324 TypeSourceInfo *T = GetTypeSourceInfo(F, Record, Idx); 5325 if (!T) 5326 return NestedNameSpecifierLoc(); 5327 SourceLocation ColonColonLoc = ReadSourceLocation(F, Record, Idx); 5328 5329 // FIXME: 'template' keyword location not saved anywhere, so we fake it. 5330 Builder.Extend(*Context, 5331 Template? T->getTypeLoc().getBeginLoc() : SourceLocation(), 5332 T->getTypeLoc(), ColonColonLoc); 5333 break; 5334 } 5335 5336 case NestedNameSpecifier::Global: { 5337 SourceLocation ColonColonLoc = ReadSourceLocation(F, Record, Idx); 5338 Builder.MakeGlobal(*Context, ColonColonLoc); 5339 break; 5340 } 5341 } 5342 } 5343 5344 return Builder.getWithLocInContext(*Context); 5345} 5346 5347SourceRange 5348ASTReader::ReadSourceRange(Module &F, const RecordData &Record, 5349 unsigned &Idx) { 5350 SourceLocation beg = ReadSourceLocation(F, Record, Idx); 5351 SourceLocation end = ReadSourceLocation(F, Record, Idx); 5352 return SourceRange(beg, end); 5353} 5354 5355/// \brief Read an integral value 5356llvm::APInt ASTReader::ReadAPInt(const RecordData &Record, unsigned &Idx) { 5357 unsigned BitWidth = Record[Idx++]; 5358 unsigned NumWords = llvm::APInt::getNumWords(BitWidth); 5359 llvm::APInt Result(BitWidth, NumWords, &Record[Idx]); 5360 Idx += NumWords; 5361 return Result; 5362} 5363 5364/// \brief Read a signed integral value 5365llvm::APSInt ASTReader::ReadAPSInt(const RecordData &Record, unsigned &Idx) { 5366 bool isUnsigned = Record[Idx++]; 5367 return llvm::APSInt(ReadAPInt(Record, Idx), isUnsigned); 5368} 5369 5370/// \brief Read a floating-point value 5371llvm::APFloat ASTReader::ReadAPFloat(const RecordData &Record, unsigned &Idx) { 5372 return llvm::APFloat(ReadAPInt(Record, Idx)); 5373} 5374 5375// \brief Read a string 5376std::string ASTReader::ReadString(const RecordData &Record, unsigned &Idx) { 5377 unsigned Len = Record[Idx++]; 5378 std::string Result(Record.data() + Idx, Record.data() + Idx + Len); 5379 Idx += Len; 5380 return Result; 5381} 5382 5383VersionTuple ASTReader::ReadVersionTuple(const RecordData &Record, 5384 unsigned &Idx) { 5385 unsigned Major = Record[Idx++]; 5386 unsigned Minor = Record[Idx++]; 5387 unsigned Subminor = Record[Idx++]; 5388 if (Minor == 0) 5389 return VersionTuple(Major); 5390 if (Subminor == 0) 5391 return VersionTuple(Major, Minor - 1); 5392 return VersionTuple(Major, Minor - 1, Subminor - 1); 5393} 5394 5395CXXTemporary *ASTReader::ReadCXXTemporary(Module &F, 5396 const RecordData &Record, 5397 unsigned &Idx) { 5398 CXXDestructorDecl *Decl = ReadDeclAs<CXXDestructorDecl>(F, Record, Idx); 5399 return CXXTemporary::Create(*Context, Decl); 5400} 5401 5402DiagnosticBuilder ASTReader::Diag(unsigned DiagID) { 5403 return Diag(SourceLocation(), DiagID); 5404} 5405 5406DiagnosticBuilder ASTReader::Diag(SourceLocation Loc, unsigned DiagID) { 5407 return Diags.Report(Loc, DiagID); 5408} 5409 5410/// \brief Retrieve the identifier table associated with the 5411/// preprocessor. 5412IdentifierTable &ASTReader::getIdentifierTable() { 5413 assert(PP && "Forgot to set Preprocessor ?"); 5414 return PP->getIdentifierTable(); 5415} 5416 5417/// \brief Record that the given ID maps to the given switch-case 5418/// statement. 5419void ASTReader::RecordSwitchCaseID(SwitchCase *SC, unsigned ID) { 5420 assert(SwitchCaseStmts[ID] == 0 && "Already have a SwitchCase with this ID"); 5421 SwitchCaseStmts[ID] = SC; 5422} 5423 5424/// \brief Retrieve the switch-case statement with the given ID. 5425SwitchCase *ASTReader::getSwitchCaseWithID(unsigned ID) { 5426 assert(SwitchCaseStmts[ID] != 0 && "No SwitchCase with this ID"); 5427 return SwitchCaseStmts[ID]; 5428} 5429 5430void ASTReader::ClearSwitchCaseIDs() { 5431 SwitchCaseStmts.clear(); 5432} 5433 5434void ASTReader::FinishedDeserializing() { 5435 assert(NumCurrentElementsDeserializing && 5436 "FinishedDeserializing not paired with StartedDeserializing"); 5437 if (NumCurrentElementsDeserializing == 1) { 5438 // If any identifiers with corresponding top-level declarations have 5439 // been loaded, load those declarations now. 5440 while (!PendingIdentifierInfos.empty()) { 5441 SetGloballyVisibleDecls(PendingIdentifierInfos.front().II, 5442 PendingIdentifierInfos.front().DeclIDs, true); 5443 PendingIdentifierInfos.pop_front(); 5444 } 5445 5446 // Ready to load previous declarations of Decls that were delayed. 5447 while (!PendingPreviousDecls.empty()) { 5448 loadAndAttachPreviousDecl(PendingPreviousDecls.front().first, 5449 PendingPreviousDecls.front().second); 5450 PendingPreviousDecls.pop_front(); 5451 } 5452 5453 // We are not in recursive loading, so it's safe to pass the "interesting" 5454 // decls to the consumer. 5455 if (Consumer) 5456 PassInterestingDeclsToConsumer(); 5457 5458 assert(PendingForwardRefs.size() == 0 && 5459 "Some forward refs did not get linked to the definition!"); 5460 } 5461 --NumCurrentElementsDeserializing; 5462} 5463 5464ASTReader::ASTReader(Preprocessor &PP, ASTContext *Context, 5465 StringRef isysroot, bool DisableValidation, 5466 bool DisableStatCache) 5467 : Listener(new PCHValidator(PP, *this)), DeserializationListener(0), 5468 SourceMgr(PP.getSourceManager()), FileMgr(PP.getFileManager()), 5469 Diags(PP.getDiagnostics()), SemaObj(0), PP(&PP), Context(Context), 5470 Consumer(0), ModuleMgr(FileMgr.getFileSystemOptions()), 5471 RelocatablePCH(false), isysroot(isysroot), 5472 DisableValidation(DisableValidation), 5473 DisableStatCache(DisableStatCache), NumStatHits(0), NumStatMisses(0), 5474 NumSLocEntriesRead(0), TotalNumSLocEntries(0), 5475 NumStatementsRead(0), TotalNumStatements(0), NumMacrosRead(0), 5476 TotalNumMacros(0), NumSelectorsRead(0), NumMethodPoolEntriesRead(0), 5477 NumMethodPoolMisses(0), TotalNumMethodPoolEntries(0), 5478 NumLexicalDeclContextsRead(0), TotalLexicalDeclContexts(0), 5479 NumVisibleDeclContextsRead(0), TotalVisibleDeclContexts(0), 5480 TotalModulesSizeInBits(0), NumCurrentElementsDeserializing(0), 5481 NumCXXBaseSpecifiersLoaded(0) 5482{ 5483 SourceMgr.setExternalSLocEntrySource(this); 5484} 5485 5486ASTReader::ASTReader(SourceManager &SourceMgr, FileManager &FileMgr, 5487 Diagnostic &Diags, StringRef isysroot, 5488 bool DisableValidation, bool DisableStatCache) 5489 : DeserializationListener(0), SourceMgr(SourceMgr), FileMgr(FileMgr), 5490 Diags(Diags), SemaObj(0), PP(0), Context(0), 5491 Consumer(0), ModuleMgr(FileMgr.getFileSystemOptions()), 5492 RelocatablePCH(false), isysroot(isysroot), 5493 DisableValidation(DisableValidation), DisableStatCache(DisableStatCache), 5494 NumStatHits(0), NumStatMisses(0), NumSLocEntriesRead(0), 5495 TotalNumSLocEntries(0), NumStatementsRead(0), 5496 TotalNumStatements(0), NumMacrosRead(0), TotalNumMacros(0), 5497 NumSelectorsRead(0), NumMethodPoolEntriesRead(0), NumMethodPoolMisses(0), 5498 TotalNumMethodPoolEntries(0), NumLexicalDeclContextsRead(0), 5499 TotalLexicalDeclContexts(0), NumVisibleDeclContextsRead(0), 5500 TotalVisibleDeclContexts(0), TotalModulesSizeInBits(0), 5501 NumCurrentElementsDeserializing(0), NumCXXBaseSpecifiersLoaded(0) 5502{ 5503 SourceMgr.setExternalSLocEntrySource(this); 5504} 5505 5506ASTReader::~ASTReader() { 5507 // Delete all visible decl lookup tables 5508 for (DeclContextOffsetsMap::iterator I = DeclContextOffsets.begin(), 5509 E = DeclContextOffsets.end(); 5510 I != E; ++I) { 5511 for (DeclContextInfos::iterator J = I->second.begin(), F = I->second.end(); 5512 J != F; ++J) { 5513 if (J->NameLookupTableData) 5514 delete static_cast<ASTDeclContextNameLookupTable*>( 5515 J->NameLookupTableData); 5516 } 5517 } 5518 for (DeclContextVisibleUpdatesPending::iterator 5519 I = PendingVisibleUpdates.begin(), 5520 E = PendingVisibleUpdates.end(); 5521 I != E; ++I) { 5522 for (DeclContextVisibleUpdates::iterator J = I->second.begin(), 5523 F = I->second.end(); 5524 J != F; ++J) 5525 delete static_cast<ASTDeclContextNameLookupTable*>(J->first); 5526 } 5527} 5528 5529Module::Module(ModuleKind Kind) 5530 : Kind(Kind), SizeInBits(0), LocalNumSLocEntries(0), SLocEntryBaseID(0), 5531 SLocEntryBaseOffset(0), SLocEntryOffsets(0), 5532 SLocFileOffsets(0), LocalNumIdentifiers(0), 5533 IdentifierOffsets(0), BaseIdentifierID(0), IdentifierTableData(0), 5534 IdentifierLookupTable(0), BasePreprocessedEntityID(0), 5535 LocalNumMacroDefinitions(0), MacroDefinitionOffsets(0), 5536 BaseMacroDefinitionID(0), LocalNumHeaderFileInfos(0), 5537 HeaderFileInfoTableData(0), HeaderFileInfoTable(0), 5538 HeaderFileFrameworkStrings(0), 5539 LocalNumSelectors(0), SelectorOffsets(0), BaseSelectorID(0), 5540 SelectorLookupTableData(0), SelectorLookupTable(0), LocalNumDecls(0), 5541 DeclOffsets(0), BaseDeclID(0), 5542 LocalNumCXXBaseSpecifiers(0), CXXBaseSpecifiersOffsets(0), 5543 LocalNumTypes(0), TypeOffsets(0), BaseTypeIndex(0), StatCache(0), 5544 NumPreallocatedPreprocessingEntities(0) 5545{} 5546 5547Module::~Module() { 5548 delete static_cast<ASTIdentifierLookupTable *>(IdentifierLookupTable); 5549 delete static_cast<HeaderFileInfoLookupTable *>(HeaderFileInfoTable); 5550 delete static_cast<ASTSelectorLookupTable *>(SelectorLookupTable); 5551} 5552 5553template<typename Key, typename Offset, unsigned InitialCapacity> 5554static void 5555dumpLocalRemap(StringRef Name, 5556 const ContinuousRangeMap<Key, Offset, InitialCapacity> &Map) { 5557 if (Map.begin() == Map.end()) 5558 return; 5559 5560 typedef ContinuousRangeMap<Key, Offset, InitialCapacity> MapType; 5561 llvm::errs() << " " << Name << ":\n"; 5562 for (typename MapType::const_iterator I = Map.begin(), IEnd = Map.end(); 5563 I != IEnd; ++I) { 5564 llvm::errs() << " " << I->first << " -> " << I->second 5565 << "\n"; 5566 } 5567} 5568 5569void Module::dump() { 5570 llvm::errs() << "\nModule: " << FileName << "\n"; 5571 if (!Imports.empty()) { 5572 llvm::errs() << " Imports: "; 5573 for (unsigned I = 0, N = Imports.size(); I != N; ++I) { 5574 if (I) 5575 llvm::errs() << ", "; 5576 llvm::errs() << Imports[I]->FileName; 5577 } 5578 llvm::errs() << "\n"; 5579 } 5580 5581 // Remapping tables. 5582 llvm::errs() << " Base source location offset: " << SLocEntryBaseOffset 5583 << '\n'; 5584 dumpLocalRemap("Source location offset map", SLocRemap); 5585 llvm::errs() << " Base identifier ID: " << BaseIdentifierID << '\n' 5586 << "Number of identifiers: " << LocalNumIdentifiers << '\n'; 5587 dumpLocalRemap("Identifier ID map", IdentifierRemap); 5588 llvm::errs() << " Base type index: " << BaseTypeIndex << '\n' 5589 << " Number of types: " << LocalNumTypes << '\n'; 5590 dumpLocalRemap("Type index map", TypeRemap); 5591 llvm::errs() << " Base decl ID: " << BaseDeclID << '\n' 5592 << " Number of decls: " << LocalNumDecls << '\n'; 5593 dumpLocalRemap("Decl ID map", DeclRemap); 5594} 5595 5596Module *ModuleManager::lookup(StringRef Name) { 5597 const FileEntry *Entry = FileMgr.getFile(Name); 5598 return Modules[Entry]; 5599} 5600 5601llvm::MemoryBuffer *ModuleManager::lookupBuffer(StringRef Name) { 5602 const FileEntry *Entry = FileMgr.getFile(Name); 5603 return InMemoryBuffers[Entry]; 5604} 5605 5606/// \brief Creates a new module and adds it to the list of known modules 5607Module &ModuleManager::addModule(StringRef FileName, ModuleKind Type) { 5608 Module *Prev = !size() ? 0 : &getLastModule(); 5609 Module *Current = new Module(Type); 5610 5611 Current->FileName = FileName.str(); 5612 5613 Chain.push_back(Current); 5614 const FileEntry *Entry = FileMgr.getFile(FileName); 5615 Modules[Entry] = Current; 5616 5617 if (Prev) { 5618 Current->ImportedBy.insert(Prev); 5619 Prev->Imports.insert(Current); 5620 } 5621 5622 return *Current; 5623} 5624 5625void ModuleManager::addInMemoryBuffer(StringRef FileName, 5626 llvm::MemoryBuffer *Buffer) { 5627 5628 const FileEntry *Entry = FileMgr.getVirtualFile(FileName, 5629 Buffer->getBufferSize(), 0); 5630 InMemoryBuffers[Entry] = Buffer; 5631} 5632/// \brief Exports the list of loaded modules with their corresponding names 5633void ModuleManager::exportLookup(SmallVector<ModuleOffset, 16> &Target) { 5634 Target.reserve(size()); 5635 for (ModuleConstIterator I = Chain.begin(), E = Chain.end(); 5636 I != E; ++I) { 5637 Target.push_back(ModuleOffset((*I)->SLocEntryBaseOffset, 5638 (*I)->FileName)); 5639 } 5640 std::sort(Target.begin(), Target.end()); 5641} 5642 5643ModuleManager::ModuleManager(const FileSystemOptions &FSO) : FileMgr(FSO) { } 5644 5645ModuleManager::~ModuleManager() { 5646 for (unsigned i = 0, e = Chain.size(); i != e; ++i) 5647 delete Chain[e - i - 1]; 5648} 5649