ASTReader.cpp revision 0815b579b31cb3129f732bb7ea36fd6ba6949e98
1//===--- ASTReader.cpp - AST File Reader ------------------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the ASTReader class, which reads AST files. 11// 12//===----------------------------------------------------------------------===// 13 14#include "clang/Serialization/ASTReader.h" 15#include "clang/Serialization/ASTDeserializationListener.h" 16#include "ASTCommon.h" 17#include "clang/Frontend/FrontendDiagnostic.h" 18#include "clang/Frontend/Utils.h" 19#include "clang/Sema/Sema.h" 20#include "clang/Sema/Scope.h" 21#include "clang/AST/ASTConsumer.h" 22#include "clang/AST/ASTContext.h" 23#include "clang/AST/DeclTemplate.h" 24#include "clang/AST/Expr.h" 25#include "clang/AST/ExprCXX.h" 26#include "clang/AST/NestedNameSpecifier.h" 27#include "clang/AST/Type.h" 28#include "clang/AST/TypeLocVisitor.h" 29#include "clang/Lex/MacroInfo.h" 30#include "clang/Lex/PreprocessingRecord.h" 31#include "clang/Lex/Preprocessor.h" 32#include "clang/Lex/HeaderSearch.h" 33#include "clang/Basic/OnDiskHashTable.h" 34#include "clang/Basic/SourceManager.h" 35#include "clang/Basic/SourceManagerInternals.h" 36#include "clang/Basic/FileManager.h" 37#include "clang/Basic/FileSystemStatCache.h" 38#include "clang/Basic/TargetInfo.h" 39#include "clang/Basic/Version.h" 40#include "clang/Basic/VersionTuple.h" 41#include "llvm/ADT/StringExtras.h" 42#include "llvm/Bitcode/BitstreamReader.h" 43#include "llvm/Support/MemoryBuffer.h" 44#include "llvm/Support/ErrorHandling.h" 45#include "llvm/Support/FileSystem.h" 46#include "llvm/Support/Path.h" 47#include "llvm/Support/system_error.h" 48#include <algorithm> 49#include <iterator> 50#include <cstdio> 51#include <sys/stat.h> 52#include <iostream> 53 54using namespace clang; 55using namespace clang::serialization; 56 57//===----------------------------------------------------------------------===// 58// PCH validator implementation 59//===----------------------------------------------------------------------===// 60 61ASTReaderListener::~ASTReaderListener() {} 62 63bool 64PCHValidator::ReadLanguageOptions(const LangOptions &LangOpts) { 65 const LangOptions &PPLangOpts = PP.getLangOptions(); 66#define PARSE_LANGOPT_BENIGN(Option) 67#define PARSE_LANGOPT_IMPORTANT(Option, DiagID) \ 68 if (PPLangOpts.Option != LangOpts.Option) { \ 69 Reader.Diag(DiagID) << LangOpts.Option << PPLangOpts.Option; \ 70 return true; \ 71 } 72 73 PARSE_LANGOPT_BENIGN(Trigraphs); 74 PARSE_LANGOPT_BENIGN(BCPLComment); 75 PARSE_LANGOPT_BENIGN(DollarIdents); 76 PARSE_LANGOPT_BENIGN(AsmPreprocessor); 77 PARSE_LANGOPT_IMPORTANT(GNUMode, diag::warn_pch_gnu_extensions); 78 PARSE_LANGOPT_IMPORTANT(GNUKeywords, diag::warn_pch_gnu_keywords); 79 PARSE_LANGOPT_BENIGN(ImplicitInt); 80 PARSE_LANGOPT_BENIGN(Digraphs); 81 PARSE_LANGOPT_BENIGN(HexFloats); 82 PARSE_LANGOPT_IMPORTANT(C99, diag::warn_pch_c99); 83 PARSE_LANGOPT_IMPORTANT(C1X, diag::warn_pch_c1x); 84 PARSE_LANGOPT_IMPORTANT(Microsoft, diag::warn_pch_microsoft_extensions); 85 PARSE_LANGOPT_BENIGN(MSCVersion); 86 PARSE_LANGOPT_IMPORTANT(CPlusPlus, diag::warn_pch_cplusplus); 87 PARSE_LANGOPT_IMPORTANT(CPlusPlus0x, diag::warn_pch_cplusplus0x); 88 PARSE_LANGOPT_BENIGN(CXXOperatorName); 89 PARSE_LANGOPT_IMPORTANT(ObjC1, diag::warn_pch_objective_c); 90 PARSE_LANGOPT_IMPORTANT(ObjC2, diag::warn_pch_objective_c2); 91 PARSE_LANGOPT_IMPORTANT(ObjCNonFragileABI, diag::warn_pch_nonfragile_abi); 92 PARSE_LANGOPT_IMPORTANT(ObjCNonFragileABI2, diag::warn_pch_nonfragile_abi2); 93 PARSE_LANGOPT_IMPORTANT(AppleKext, diag::warn_pch_apple_kext); 94 PARSE_LANGOPT_IMPORTANT(ObjCDefaultSynthProperties, 95 diag::warn_pch_objc_auto_properties); 96 PARSE_LANGOPT_BENIGN(ObjCInferRelatedResultType) 97 PARSE_LANGOPT_IMPORTANT(NoConstantCFStrings, 98 diag::warn_pch_no_constant_cfstrings); 99 PARSE_LANGOPT_BENIGN(PascalStrings); 100 PARSE_LANGOPT_BENIGN(WritableStrings); 101 PARSE_LANGOPT_IMPORTANT(LaxVectorConversions, 102 diag::warn_pch_lax_vector_conversions); 103 PARSE_LANGOPT_IMPORTANT(AltiVec, diag::warn_pch_altivec); 104 PARSE_LANGOPT_IMPORTANT(Exceptions, diag::warn_pch_exceptions); 105 PARSE_LANGOPT_IMPORTANT(ObjCExceptions, diag::warn_pch_objc_exceptions); 106 PARSE_LANGOPT_IMPORTANT(CXXExceptions, diag::warn_pch_cxx_exceptions); 107 PARSE_LANGOPT_IMPORTANT(SjLjExceptions, diag::warn_pch_sjlj_exceptions); 108 PARSE_LANGOPT_IMPORTANT(MSBitfields, diag::warn_pch_ms_bitfields); 109 PARSE_LANGOPT_IMPORTANT(NeXTRuntime, diag::warn_pch_objc_runtime); 110 PARSE_LANGOPT_IMPORTANT(Freestanding, diag::warn_pch_freestanding); 111 PARSE_LANGOPT_IMPORTANT(NoBuiltin, diag::warn_pch_builtins); 112 PARSE_LANGOPT_IMPORTANT(ThreadsafeStatics, 113 diag::warn_pch_thread_safe_statics); 114 PARSE_LANGOPT_IMPORTANT(POSIXThreads, diag::warn_pch_posix_threads); 115 PARSE_LANGOPT_IMPORTANT(Blocks, diag::warn_pch_blocks); 116 PARSE_LANGOPT_BENIGN(EmitAllDecls); 117 PARSE_LANGOPT_IMPORTANT(MathErrno, diag::warn_pch_math_errno); 118 PARSE_LANGOPT_BENIGN(getSignedOverflowBehavior()); 119 PARSE_LANGOPT_IMPORTANT(HeinousExtensions, 120 diag::warn_pch_heinous_extensions); 121 // FIXME: Most of the options below are benign if the macro wasn't 122 // used. Unfortunately, this means that a PCH compiled without 123 // optimization can't be used with optimization turned on, even 124 // though the only thing that changes is whether __OPTIMIZE__ was 125 // defined... but if __OPTIMIZE__ never showed up in the header, it 126 // doesn't matter. We could consider making this some special kind 127 // of check. 128 PARSE_LANGOPT_IMPORTANT(Optimize, diag::warn_pch_optimize); 129 PARSE_LANGOPT_IMPORTANT(OptimizeSize, diag::warn_pch_optimize_size); 130 PARSE_LANGOPT_IMPORTANT(Static, diag::warn_pch_static); 131 PARSE_LANGOPT_IMPORTANT(PICLevel, diag::warn_pch_pic_level); 132 PARSE_LANGOPT_IMPORTANT(GNUInline, diag::warn_pch_gnu_inline); 133 PARSE_LANGOPT_IMPORTANT(NoInline, diag::warn_pch_no_inline); 134 PARSE_LANGOPT_IMPORTANT(Deprecated, diag::warn_pch_deprecated); 135 PARSE_LANGOPT_IMPORTANT(AccessControl, diag::warn_pch_access_control); 136 PARSE_LANGOPT_IMPORTANT(CharIsSigned, diag::warn_pch_char_signed); 137 PARSE_LANGOPT_IMPORTANT(ShortWChar, diag::warn_pch_short_wchar); 138 PARSE_LANGOPT_IMPORTANT(ShortEnums, diag::warn_pch_short_enums); 139 if ((PPLangOpts.getGCMode() != 0) != (LangOpts.getGCMode() != 0)) { 140 Reader.Diag(diag::warn_pch_gc_mode) 141 << LangOpts.getGCMode() << PPLangOpts.getGCMode(); 142 return true; 143 } 144 PARSE_LANGOPT_BENIGN(getVisibilityMode()); 145 PARSE_LANGOPT_IMPORTANT(getStackProtectorMode(), 146 diag::warn_pch_stack_protector); 147 PARSE_LANGOPT_BENIGN(InstantiationDepth); 148 PARSE_LANGOPT_IMPORTANT(OpenCL, diag::warn_pch_opencl); 149 PARSE_LANGOPT_IMPORTANT(CUDA, diag::warn_pch_cuda); 150 PARSE_LANGOPT_BENIGN(CatchUndefined); 151 PARSE_LANGOPT_BENIGN(DefaultFPContract); 152 PARSE_LANGOPT_IMPORTANT(ElideConstructors, diag::warn_pch_elide_constructors); 153 PARSE_LANGOPT_BENIGN(SpellChecking); 154 PARSE_LANGOPT_IMPORTANT(ObjCAutoRefCount, diag::warn_pch_auto_ref_count); 155 PARSE_LANGOPT_BENIGN(ObjCInferRelatedReturnType); 156#undef PARSE_LANGOPT_IMPORTANT 157#undef PARSE_LANGOPT_BENIGN 158 159 return false; 160} 161 162bool PCHValidator::ReadTargetTriple(StringRef Triple) { 163 if (Triple == PP.getTargetInfo().getTriple().str()) 164 return false; 165 166 Reader.Diag(diag::warn_pch_target_triple) 167 << Triple << PP.getTargetInfo().getTriple().str(); 168 return true; 169} 170 171namespace { 172 struct EmptyStringRef { 173 bool operator ()(StringRef r) const { return r.empty(); } 174 }; 175 struct EmptyBlock { 176 bool operator ()(const PCHPredefinesBlock &r) const {return r.Data.empty();} 177 }; 178} 179 180static bool EqualConcatenations(SmallVector<StringRef, 2> L, 181 PCHPredefinesBlocks R) { 182 // First, sum up the lengths. 183 unsigned LL = 0, RL = 0; 184 for (unsigned I = 0, N = L.size(); I != N; ++I) { 185 LL += L[I].size(); 186 } 187 for (unsigned I = 0, N = R.size(); I != N; ++I) { 188 RL += R[I].Data.size(); 189 } 190 if (LL != RL) 191 return false; 192 if (LL == 0 && RL == 0) 193 return true; 194 195 // Kick out empty parts, they confuse the algorithm below. 196 L.erase(std::remove_if(L.begin(), L.end(), EmptyStringRef()), L.end()); 197 R.erase(std::remove_if(R.begin(), R.end(), EmptyBlock()), R.end()); 198 199 // Do it the hard way. At this point, both vectors must be non-empty. 200 StringRef LR = L[0], RR = R[0].Data; 201 unsigned LI = 0, RI = 0, LN = L.size(), RN = R.size(); 202 (void) RN; 203 for (;;) { 204 // Compare the current pieces. 205 if (LR.size() == RR.size()) { 206 // If they're the same length, it's pretty easy. 207 if (LR != RR) 208 return false; 209 // Both pieces are done, advance. 210 ++LI; 211 ++RI; 212 // If either string is done, they're both done, since they're the same 213 // length. 214 if (LI == LN) { 215 assert(RI == RN && "Strings not the same length after all?"); 216 return true; 217 } 218 LR = L[LI]; 219 RR = R[RI].Data; 220 } else if (LR.size() < RR.size()) { 221 // Right piece is longer. 222 if (!RR.startswith(LR)) 223 return false; 224 ++LI; 225 assert(LI != LN && "Strings not the same length after all?"); 226 RR = RR.substr(LR.size()); 227 LR = L[LI]; 228 } else { 229 // Left piece is longer. 230 if (!LR.startswith(RR)) 231 return false; 232 ++RI; 233 assert(RI != RN && "Strings not the same length after all?"); 234 LR = LR.substr(RR.size()); 235 RR = R[RI].Data; 236 } 237 } 238} 239 240static std::pair<FileID, StringRef::size_type> 241FindMacro(const PCHPredefinesBlocks &Buffers, StringRef MacroDef) { 242 std::pair<FileID, StringRef::size_type> Res; 243 for (unsigned I = 0, N = Buffers.size(); I != N; ++I) { 244 Res.second = Buffers[I].Data.find(MacroDef); 245 if (Res.second != StringRef::npos) { 246 Res.first = Buffers[I].BufferID; 247 break; 248 } 249 } 250 return Res; 251} 252 253bool PCHValidator::ReadPredefinesBuffer(const PCHPredefinesBlocks &Buffers, 254 StringRef OriginalFileName, 255 std::string &SuggestedPredefines, 256 FileManager &FileMgr) { 257 // We are in the context of an implicit include, so the predefines buffer will 258 // have a #include entry for the PCH file itself (as normalized by the 259 // preprocessor initialization). Find it and skip over it in the checking 260 // below. 261 llvm::SmallString<256> PCHInclude; 262 PCHInclude += "#include \""; 263 PCHInclude += NormalizeDashIncludePath(OriginalFileName, FileMgr); 264 PCHInclude += "\"\n"; 265 std::pair<StringRef,StringRef> Split = 266 StringRef(PP.getPredefines()).split(PCHInclude.str()); 267 StringRef Left = Split.first, Right = Split.second; 268 if (Left == PP.getPredefines()) { 269 Error("Missing PCH include entry!"); 270 return true; 271 } 272 273 // If the concatenation of all the PCH buffers is equal to the adjusted 274 // command line, we're done. 275 SmallVector<StringRef, 2> CommandLine; 276 CommandLine.push_back(Left); 277 CommandLine.push_back(Right); 278 if (EqualConcatenations(CommandLine, Buffers)) 279 return false; 280 281 SourceManager &SourceMgr = PP.getSourceManager(); 282 283 // The predefines buffers are different. Determine what the differences are, 284 // and whether they require us to reject the PCH file. 285 SmallVector<StringRef, 8> PCHLines; 286 for (unsigned I = 0, N = Buffers.size(); I != N; ++I) 287 Buffers[I].Data.split(PCHLines, "\n", /*MaxSplit=*/-1, /*KeepEmpty=*/false); 288 289 SmallVector<StringRef, 8> CmdLineLines; 290 Left.split(CmdLineLines, "\n", /*MaxSplit=*/-1, /*KeepEmpty=*/false); 291 292 // Pick out implicit #includes after the PCH and don't consider them for 293 // validation; we will insert them into SuggestedPredefines so that the 294 // preprocessor includes them. 295 std::string IncludesAfterPCH; 296 SmallVector<StringRef, 8> AfterPCHLines; 297 Right.split(AfterPCHLines, "\n", /*MaxSplit=*/-1, /*KeepEmpty=*/false); 298 for (unsigned i = 0, e = AfterPCHLines.size(); i != e; ++i) { 299 if (AfterPCHLines[i].startswith("#include ")) { 300 IncludesAfterPCH += AfterPCHLines[i]; 301 IncludesAfterPCH += '\n'; 302 } else { 303 CmdLineLines.push_back(AfterPCHLines[i]); 304 } 305 } 306 307 // Make sure we add the includes last into SuggestedPredefines before we 308 // exit this function. 309 struct AddIncludesRAII { 310 std::string &SuggestedPredefines; 311 std::string &IncludesAfterPCH; 312 313 AddIncludesRAII(std::string &SuggestedPredefines, 314 std::string &IncludesAfterPCH) 315 : SuggestedPredefines(SuggestedPredefines), 316 IncludesAfterPCH(IncludesAfterPCH) { } 317 ~AddIncludesRAII() { 318 SuggestedPredefines += IncludesAfterPCH; 319 } 320 } AddIncludes(SuggestedPredefines, IncludesAfterPCH); 321 322 // Sort both sets of predefined buffer lines, since we allow some extra 323 // definitions and they may appear at any point in the output. 324 std::sort(CmdLineLines.begin(), CmdLineLines.end()); 325 std::sort(PCHLines.begin(), PCHLines.end()); 326 327 // Determine which predefines that were used to build the PCH file are missing 328 // from the command line. 329 std::vector<StringRef> MissingPredefines; 330 std::set_difference(PCHLines.begin(), PCHLines.end(), 331 CmdLineLines.begin(), CmdLineLines.end(), 332 std::back_inserter(MissingPredefines)); 333 334 bool MissingDefines = false; 335 bool ConflictingDefines = false; 336 for (unsigned I = 0, N = MissingPredefines.size(); I != N; ++I) { 337 StringRef Missing = MissingPredefines[I]; 338 if (Missing.startswith("#include ")) { 339 // An -include was specified when generating the PCH; it is included in 340 // the PCH, just ignore it. 341 continue; 342 } 343 if (!Missing.startswith("#define ")) { 344 Reader.Diag(diag::warn_pch_compiler_options_mismatch); 345 return true; 346 } 347 348 // This is a macro definition. Determine the name of the macro we're 349 // defining. 350 std::string::size_type StartOfMacroName = strlen("#define "); 351 std::string::size_type EndOfMacroName 352 = Missing.find_first_of("( \n\r", StartOfMacroName); 353 assert(EndOfMacroName != std::string::npos && 354 "Couldn't find the end of the macro name"); 355 StringRef MacroName = Missing.slice(StartOfMacroName, EndOfMacroName); 356 357 // Determine whether this macro was given a different definition on the 358 // command line. 359 std::string MacroDefStart = "#define " + MacroName.str(); 360 std::string::size_type MacroDefLen = MacroDefStart.size(); 361 SmallVector<StringRef, 8>::iterator ConflictPos 362 = std::lower_bound(CmdLineLines.begin(), CmdLineLines.end(), 363 MacroDefStart); 364 for (; ConflictPos != CmdLineLines.end(); ++ConflictPos) { 365 if (!ConflictPos->startswith(MacroDefStart)) { 366 // Different macro; we're done. 367 ConflictPos = CmdLineLines.end(); 368 break; 369 } 370 371 assert(ConflictPos->size() > MacroDefLen && 372 "Invalid #define in predefines buffer?"); 373 if ((*ConflictPos)[MacroDefLen] != ' ' && 374 (*ConflictPos)[MacroDefLen] != '(') 375 continue; // Longer macro name; keep trying. 376 377 // We found a conflicting macro definition. 378 break; 379 } 380 381 if (ConflictPos != CmdLineLines.end()) { 382 Reader.Diag(diag::warn_cmdline_conflicting_macro_def) 383 << MacroName; 384 385 // Show the definition of this macro within the PCH file. 386 std::pair<FileID, StringRef::size_type> MacroLoc = 387 FindMacro(Buffers, Missing); 388 assert(MacroLoc.second!=StringRef::npos && "Unable to find macro!"); 389 SourceLocation PCHMissingLoc = 390 SourceMgr.getLocForStartOfFile(MacroLoc.first) 391 .getFileLocWithOffset(MacroLoc.second); 392 Reader.Diag(PCHMissingLoc, diag::note_pch_macro_defined_as) << MacroName; 393 394 ConflictingDefines = true; 395 continue; 396 } 397 398 // If the macro doesn't conflict, then we'll just pick up the macro 399 // definition from the PCH file. Warn the user that they made a mistake. 400 if (ConflictingDefines) 401 continue; // Don't complain if there are already conflicting defs 402 403 if (!MissingDefines) { 404 Reader.Diag(diag::warn_cmdline_missing_macro_defs); 405 MissingDefines = true; 406 } 407 408 // Show the definition of this macro within the PCH file. 409 std::pair<FileID, StringRef::size_type> MacroLoc = 410 FindMacro(Buffers, Missing); 411 assert(MacroLoc.second!=StringRef::npos && "Unable to find macro!"); 412 SourceLocation PCHMissingLoc = 413 SourceMgr.getLocForStartOfFile(MacroLoc.first) 414 .getFileLocWithOffset(MacroLoc.second); 415 Reader.Diag(PCHMissingLoc, diag::note_using_macro_def_from_pch); 416 } 417 418 if (ConflictingDefines) 419 return true; 420 421 // Determine what predefines were introduced based on command-line 422 // parameters that were not present when building the PCH 423 // file. Extra #defines are okay, so long as the identifiers being 424 // defined were not used within the precompiled header. 425 std::vector<StringRef> ExtraPredefines; 426 std::set_difference(CmdLineLines.begin(), CmdLineLines.end(), 427 PCHLines.begin(), PCHLines.end(), 428 std::back_inserter(ExtraPredefines)); 429 for (unsigned I = 0, N = ExtraPredefines.size(); I != N; ++I) { 430 StringRef &Extra = ExtraPredefines[I]; 431 if (!Extra.startswith("#define ")) { 432 Reader.Diag(diag::warn_pch_compiler_options_mismatch); 433 return true; 434 } 435 436 // This is an extra macro definition. Determine the name of the 437 // macro we're defining. 438 std::string::size_type StartOfMacroName = strlen("#define "); 439 std::string::size_type EndOfMacroName 440 = Extra.find_first_of("( \n\r", StartOfMacroName); 441 assert(EndOfMacroName != std::string::npos && 442 "Couldn't find the end of the macro name"); 443 StringRef MacroName = Extra.slice(StartOfMacroName, EndOfMacroName); 444 445 // Check whether this name was used somewhere in the PCH file. If 446 // so, defining it as a macro could change behavior, so we reject 447 // the PCH file. 448 if (IdentifierInfo *II = Reader.get(MacroName)) { 449 Reader.Diag(diag::warn_macro_name_used_in_pch) << II; 450 return true; 451 } 452 453 // Add this definition to the suggested predefines buffer. 454 SuggestedPredefines += Extra; 455 SuggestedPredefines += '\n'; 456 } 457 458 // If we get here, it's because the predefines buffer had compatible 459 // contents. Accept the PCH file. 460 return false; 461} 462 463void PCHValidator::ReadHeaderFileInfo(const HeaderFileInfo &HFI, 464 unsigned ID) { 465 PP.getHeaderSearchInfo().setHeaderFileInfoForUID(HFI, ID); 466 ++NumHeaderInfos; 467} 468 469void PCHValidator::ReadCounter(unsigned Value) { 470 PP.setCounterValue(Value); 471} 472 473//===----------------------------------------------------------------------===// 474// AST reader implementation 475//===----------------------------------------------------------------------===// 476 477void 478ASTReader::setDeserializationListener(ASTDeserializationListener *Listener) { 479 DeserializationListener = Listener; 480} 481 482 483namespace { 484class ASTSelectorLookupTrait { 485 ASTReader &Reader; 486 Module &F; 487 488public: 489 struct data_type { 490 SelectorID ID; 491 ObjCMethodList Instance, Factory; 492 }; 493 494 typedef Selector external_key_type; 495 typedef external_key_type internal_key_type; 496 497 ASTSelectorLookupTrait(ASTReader &Reader, Module &F) 498 : Reader(Reader), F(F) { } 499 500 static bool EqualKey(const internal_key_type& a, 501 const internal_key_type& b) { 502 return a == b; 503 } 504 505 static unsigned ComputeHash(Selector Sel) { 506 return serialization::ComputeHash(Sel); 507 } 508 509 // This hopefully will just get inlined and removed by the optimizer. 510 static const internal_key_type& 511 GetInternalKey(const external_key_type& x) { return x; } 512 513 static std::pair<unsigned, unsigned> 514 ReadKeyDataLength(const unsigned char*& d) { 515 using namespace clang::io; 516 unsigned KeyLen = ReadUnalignedLE16(d); 517 unsigned DataLen = ReadUnalignedLE16(d); 518 return std::make_pair(KeyLen, DataLen); 519 } 520 521 internal_key_type ReadKey(const unsigned char* d, unsigned) { 522 using namespace clang::io; 523 SelectorTable &SelTable = Reader.getContext()->Selectors; 524 unsigned N = ReadUnalignedLE16(d); 525 IdentifierInfo *FirstII 526 = Reader.getLocalIdentifier(F, ReadUnalignedLE32(d)); 527 if (N == 0) 528 return SelTable.getNullarySelector(FirstII); 529 else if (N == 1) 530 return SelTable.getUnarySelector(FirstII); 531 532 SmallVector<IdentifierInfo *, 16> Args; 533 Args.push_back(FirstII); 534 for (unsigned I = 1; I != N; ++I) 535 Args.push_back(Reader.getLocalIdentifier(F, ReadUnalignedLE32(d))); 536 537 return SelTable.getSelector(N, Args.data()); 538 } 539 540 data_type ReadData(Selector, const unsigned char* d, unsigned DataLen) { 541 using namespace clang::io; 542 543 data_type Result; 544 545 Result.ID = Reader.getGlobalSelectorID(F, ReadUnalignedLE32(d)); 546 unsigned NumInstanceMethods = ReadUnalignedLE16(d); 547 unsigned NumFactoryMethods = ReadUnalignedLE16(d); 548 549 // Load instance methods 550 ObjCMethodList *Prev = 0; 551 for (unsigned I = 0; I != NumInstanceMethods; ++I) { 552 ObjCMethodDecl *Method 553 = Reader.GetLocalDeclAs<ObjCMethodDecl>(F, ReadUnalignedLE32(d)); 554 if (!Result.Instance.Method) { 555 // This is the first method, which is the easy case. 556 Result.Instance.Method = Method; 557 Prev = &Result.Instance; 558 continue; 559 } 560 561 ObjCMethodList *Mem = 562 Reader.getSema()->BumpAlloc.Allocate<ObjCMethodList>(); 563 Prev->Next = new (Mem) ObjCMethodList(Method, 0); 564 Prev = Prev->Next; 565 } 566 567 // Load factory methods 568 Prev = 0; 569 for (unsigned I = 0; I != NumFactoryMethods; ++I) { 570 ObjCMethodDecl *Method 571 = Reader.GetLocalDeclAs<ObjCMethodDecl>(F, ReadUnalignedLE32(d)); 572 if (!Result.Factory.Method) { 573 // This is the first method, which is the easy case. 574 Result.Factory.Method = Method; 575 Prev = &Result.Factory; 576 continue; 577 } 578 579 ObjCMethodList *Mem = 580 Reader.getSema()->BumpAlloc.Allocate<ObjCMethodList>(); 581 Prev->Next = new (Mem) ObjCMethodList(Method, 0); 582 Prev = Prev->Next; 583 } 584 585 return Result; 586 } 587}; 588 589} // end anonymous namespace 590 591/// \brief The on-disk hash table used for the global method pool. 592typedef OnDiskChainedHashTable<ASTSelectorLookupTrait> 593 ASTSelectorLookupTable; 594 595namespace clang { 596class ASTIdentifierLookupTrait { 597 ASTReader &Reader; 598 Module &F; 599 600 // If we know the IdentifierInfo in advance, it is here and we will 601 // not build a new one. Used when deserializing information about an 602 // identifier that was constructed before the AST file was read. 603 IdentifierInfo *KnownII; 604 605public: 606 typedef IdentifierInfo * data_type; 607 608 typedef const std::pair<const char*, unsigned> external_key_type; 609 610 typedef external_key_type internal_key_type; 611 612 ASTIdentifierLookupTrait(ASTReader &Reader, Module &F, 613 IdentifierInfo *II = 0) 614 : Reader(Reader), F(F), KnownII(II) { } 615 616 static bool EqualKey(const internal_key_type& a, 617 const internal_key_type& b) { 618 return (a.second == b.second) ? memcmp(a.first, b.first, a.second) == 0 619 : false; 620 } 621 622 static unsigned ComputeHash(const internal_key_type& a) { 623 return llvm::HashString(StringRef(a.first, a.second)); 624 } 625 626 // This hopefully will just get inlined and removed by the optimizer. 627 static const internal_key_type& 628 GetInternalKey(const external_key_type& x) { return x; } 629 630 // This hopefully will just get inlined and removed by the optimizer. 631 static const external_key_type& 632 GetExternalKey(const internal_key_type& x) { return x; } 633 634 static std::pair<unsigned, unsigned> 635 ReadKeyDataLength(const unsigned char*& d) { 636 using namespace clang::io; 637 unsigned DataLen = ReadUnalignedLE16(d); 638 unsigned KeyLen = ReadUnalignedLE16(d); 639 return std::make_pair(KeyLen, DataLen); 640 } 641 642 static std::pair<const char*, unsigned> 643 ReadKey(const unsigned char* d, unsigned n) { 644 assert(n >= 2 && d[n-1] == '\0'); 645 return std::make_pair((const char*) d, n-1); 646 } 647 648 IdentifierInfo *ReadData(const internal_key_type& k, 649 const unsigned char* d, 650 unsigned DataLen) { 651 using namespace clang::io; 652 unsigned RawID = ReadUnalignedLE32(d); 653 bool IsInteresting = RawID & 0x01; 654 655 // Wipe out the "is interesting" bit. 656 RawID = RawID >> 1; 657 658 IdentID ID = Reader.getGlobalIdentifierID(F, RawID); 659 if (!IsInteresting) { 660 // For uninteresting identifiers, just build the IdentifierInfo 661 // and associate it with the persistent ID. 662 IdentifierInfo *II = KnownII; 663 if (!II) 664 II = &Reader.getIdentifierTable().getOwn(StringRef(k.first, k.second)); 665 Reader.SetIdentifierInfo(ID, II); 666 II->setIsFromAST(); 667 return II; 668 } 669 670 unsigned Bits = ReadUnalignedLE16(d); 671 bool CPlusPlusOperatorKeyword = Bits & 0x01; 672 Bits >>= 1; 673 bool HasRevertedTokenIDToIdentifier = Bits & 0x01; 674 Bits >>= 1; 675 bool Poisoned = Bits & 0x01; 676 Bits >>= 1; 677 bool ExtensionToken = Bits & 0x01; 678 Bits >>= 1; 679 bool hasMacroDefinition = Bits & 0x01; 680 Bits >>= 1; 681 unsigned ObjCOrBuiltinID = Bits & 0x3FF; 682 Bits >>= 10; 683 684 assert(Bits == 0 && "Extra bits in the identifier?"); 685 DataLen -= 6; 686 687 // Build the IdentifierInfo itself and link the identifier ID with 688 // the new IdentifierInfo. 689 IdentifierInfo *II = KnownII; 690 if (!II) 691 II = &Reader.getIdentifierTable().getOwn(StringRef(k.first, k.second)); 692 Reader.SetIdentifierInfo(ID, II); 693 694 // Set or check the various bits in the IdentifierInfo structure. 695 // Token IDs are read-only. 696 if (HasRevertedTokenIDToIdentifier) 697 II->RevertTokenIDToIdentifier(); 698 II->setObjCOrBuiltinID(ObjCOrBuiltinID); 699 assert(II->isExtensionToken() == ExtensionToken && 700 "Incorrect extension token flag"); 701 (void)ExtensionToken; 702 II->setIsPoisoned(Poisoned); 703 assert(II->isCPlusPlusOperatorKeyword() == CPlusPlusOperatorKeyword && 704 "Incorrect C++ operator keyword flag"); 705 (void)CPlusPlusOperatorKeyword; 706 707 // If this identifier is a macro, deserialize the macro 708 // definition. 709 if (hasMacroDefinition) { 710 uint32_t Offset = ReadUnalignedLE32(d); 711 Reader.SetIdentifierIsMacro(II, F, Offset); 712 DataLen -= 4; 713 } 714 715 // Read all of the declarations visible at global scope with this 716 // name. 717 if (Reader.getContext() == 0) return II; 718 if (DataLen > 0) { 719 SmallVector<uint32_t, 4> DeclIDs; 720 for (; DataLen > 0; DataLen -= 4) 721 DeclIDs.push_back(Reader.getGlobalDeclID(F, ReadUnalignedLE32(d))); 722 Reader.SetGloballyVisibleDecls(II, DeclIDs); 723 } 724 725 II->setIsFromAST(); 726 return II; 727 } 728}; 729 730} // end anonymous namespace 731 732/// \brief The on-disk hash table used to contain information about 733/// all of the identifiers in the program. 734typedef OnDiskChainedHashTable<ASTIdentifierLookupTrait> 735 ASTIdentifierLookupTable; 736 737namespace { 738class ASTDeclContextNameLookupTrait { 739 ASTReader &Reader; 740 Module &F; 741 742public: 743 /// \brief Pair of begin/end iterators for DeclIDs. 744 /// 745 /// Note that these declaration IDs are local to the module that contains this 746 /// particular lookup t 747 typedef std::pair<DeclID *, DeclID *> data_type; 748 749 /// \brief Special internal key for declaration names. 750 /// The hash table creates keys for comparison; we do not create 751 /// a DeclarationName for the internal key to avoid deserializing types. 752 struct DeclNameKey { 753 DeclarationName::NameKind Kind; 754 uint64_t Data; 755 DeclNameKey() : Kind((DeclarationName::NameKind)0), Data(0) { } 756 }; 757 758 typedef DeclarationName external_key_type; 759 typedef DeclNameKey internal_key_type; 760 761 explicit ASTDeclContextNameLookupTrait(ASTReader &Reader, 762 Module &F) 763 : Reader(Reader), F(F) { } 764 765 static bool EqualKey(const internal_key_type& a, 766 const internal_key_type& b) { 767 return a.Kind == b.Kind && a.Data == b.Data; 768 } 769 770 unsigned ComputeHash(const DeclNameKey &Key) const { 771 llvm::FoldingSetNodeID ID; 772 ID.AddInteger(Key.Kind); 773 774 switch (Key.Kind) { 775 case DeclarationName::Identifier: 776 case DeclarationName::CXXLiteralOperatorName: 777 ID.AddString(((IdentifierInfo*)Key.Data)->getName()); 778 break; 779 case DeclarationName::ObjCZeroArgSelector: 780 case DeclarationName::ObjCOneArgSelector: 781 case DeclarationName::ObjCMultiArgSelector: 782 ID.AddInteger(serialization::ComputeHash(Selector(Key.Data))); 783 break; 784 case DeclarationName::CXXOperatorName: 785 ID.AddInteger((OverloadedOperatorKind)Key.Data); 786 break; 787 case DeclarationName::CXXConstructorName: 788 case DeclarationName::CXXDestructorName: 789 case DeclarationName::CXXConversionFunctionName: 790 case DeclarationName::CXXUsingDirective: 791 break; 792 } 793 794 return ID.ComputeHash(); 795 } 796 797 internal_key_type GetInternalKey(const external_key_type& Name) const { 798 DeclNameKey Key; 799 Key.Kind = Name.getNameKind(); 800 switch (Name.getNameKind()) { 801 case DeclarationName::Identifier: 802 Key.Data = (uint64_t)Name.getAsIdentifierInfo(); 803 break; 804 case DeclarationName::ObjCZeroArgSelector: 805 case DeclarationName::ObjCOneArgSelector: 806 case DeclarationName::ObjCMultiArgSelector: 807 Key.Data = (uint64_t)Name.getObjCSelector().getAsOpaquePtr(); 808 break; 809 case DeclarationName::CXXOperatorName: 810 Key.Data = Name.getCXXOverloadedOperator(); 811 break; 812 case DeclarationName::CXXLiteralOperatorName: 813 Key.Data = (uint64_t)Name.getCXXLiteralIdentifier(); 814 break; 815 case DeclarationName::CXXConstructorName: 816 case DeclarationName::CXXDestructorName: 817 case DeclarationName::CXXConversionFunctionName: 818 case DeclarationName::CXXUsingDirective: 819 Key.Data = 0; 820 break; 821 } 822 823 return Key; 824 } 825 826 external_key_type GetExternalKey(const internal_key_type& Key) const { 827 ASTContext *Context = Reader.getContext(); 828 switch (Key.Kind) { 829 case DeclarationName::Identifier: 830 return DeclarationName((IdentifierInfo*)Key.Data); 831 832 case DeclarationName::ObjCZeroArgSelector: 833 case DeclarationName::ObjCOneArgSelector: 834 case DeclarationName::ObjCMultiArgSelector: 835 return DeclarationName(Selector(Key.Data)); 836 837 case DeclarationName::CXXConstructorName: 838 return Context->DeclarationNames.getCXXConstructorName( 839 Context->getCanonicalType(Reader.getLocalType(F, Key.Data))); 840 841 case DeclarationName::CXXDestructorName: 842 return Context->DeclarationNames.getCXXDestructorName( 843 Context->getCanonicalType(Reader.getLocalType(F, Key.Data))); 844 845 case DeclarationName::CXXConversionFunctionName: 846 return Context->DeclarationNames.getCXXConversionFunctionName( 847 Context->getCanonicalType(Reader.getLocalType(F, Key.Data))); 848 849 case DeclarationName::CXXOperatorName: 850 return Context->DeclarationNames.getCXXOperatorName( 851 (OverloadedOperatorKind)Key.Data); 852 853 case DeclarationName::CXXLiteralOperatorName: 854 return Context->DeclarationNames.getCXXLiteralOperatorName( 855 (IdentifierInfo*)Key.Data); 856 857 case DeclarationName::CXXUsingDirective: 858 return DeclarationName::getUsingDirectiveName(); 859 } 860 861 llvm_unreachable("Invalid Name Kind ?"); 862 } 863 864 static std::pair<unsigned, unsigned> 865 ReadKeyDataLength(const unsigned char*& d) { 866 using namespace clang::io; 867 unsigned KeyLen = ReadUnalignedLE16(d); 868 unsigned DataLen = ReadUnalignedLE16(d); 869 return std::make_pair(KeyLen, DataLen); 870 } 871 872 internal_key_type ReadKey(const unsigned char* d, unsigned) { 873 using namespace clang::io; 874 875 DeclNameKey Key; 876 Key.Kind = (DeclarationName::NameKind)*d++; 877 switch (Key.Kind) { 878 case DeclarationName::Identifier: 879 Key.Data = (uint64_t)Reader.getLocalIdentifier(F, ReadUnalignedLE32(d)); 880 break; 881 case DeclarationName::ObjCZeroArgSelector: 882 case DeclarationName::ObjCOneArgSelector: 883 case DeclarationName::ObjCMultiArgSelector: 884 Key.Data = 885 (uint64_t)Reader.getLocalSelector(F, ReadUnalignedLE32(d)) 886 .getAsOpaquePtr(); 887 break; 888 case DeclarationName::CXXOperatorName: 889 Key.Data = *d++; // OverloadedOperatorKind 890 break; 891 case DeclarationName::CXXLiteralOperatorName: 892 Key.Data = (uint64_t)Reader.getLocalIdentifier(F, ReadUnalignedLE32(d)); 893 break; 894 case DeclarationName::CXXConstructorName: 895 case DeclarationName::CXXDestructorName: 896 case DeclarationName::CXXConversionFunctionName: 897 case DeclarationName::CXXUsingDirective: 898 Key.Data = 0; 899 break; 900 } 901 902 return Key; 903 } 904 905 data_type ReadData(internal_key_type, const unsigned char* d, 906 unsigned DataLen) { 907 using namespace clang::io; 908 unsigned NumDecls = ReadUnalignedLE16(d); 909 DeclID *Start = (DeclID *)d; 910 return std::make_pair(Start, Start + NumDecls); 911 } 912}; 913 914} // end anonymous namespace 915 916/// \brief The on-disk hash table used for the DeclContext's Name lookup table. 917typedef OnDiskChainedHashTable<ASTDeclContextNameLookupTrait> 918 ASTDeclContextNameLookupTable; 919 920bool ASTReader::ReadDeclContextStorage(llvm::BitstreamCursor &Cursor, 921 const std::pair<uint64_t, uint64_t> &Offsets, 922 DeclContextInfo &Info) { 923 SavedStreamPosition SavedPosition(Cursor); 924 // First the lexical decls. 925 if (Offsets.first != 0) { 926 Cursor.JumpToBit(Offsets.first); 927 928 RecordData Record; 929 const char *Blob; 930 unsigned BlobLen; 931 unsigned Code = Cursor.ReadCode(); 932 unsigned RecCode = Cursor.ReadRecord(Code, Record, &Blob, &BlobLen); 933 if (RecCode != DECL_CONTEXT_LEXICAL) { 934 Error("Expected lexical block"); 935 return true; 936 } 937 938 Info.LexicalDecls = reinterpret_cast<const KindDeclIDPair*>(Blob); 939 Info.NumLexicalDecls = BlobLen / sizeof(KindDeclIDPair); 940 } else { 941 Info.LexicalDecls = 0; 942 Info.NumLexicalDecls = 0; 943 } 944 945 // Now the lookup table. 946 if (Offsets.second != 0) { 947 Cursor.JumpToBit(Offsets.second); 948 949 RecordData Record; 950 const char *Blob; 951 unsigned BlobLen; 952 unsigned Code = Cursor.ReadCode(); 953 unsigned RecCode = Cursor.ReadRecord(Code, Record, &Blob, &BlobLen); 954 if (RecCode != DECL_CONTEXT_VISIBLE) { 955 Error("Expected visible lookup table block"); 956 return true; 957 } 958 Info.NameLookupTableData 959 = ASTDeclContextNameLookupTable::Create( 960 (const unsigned char *)Blob + Record[0], 961 (const unsigned char *)Blob, 962 ASTDeclContextNameLookupTrait(*this, *Info.F)); 963 } else { 964 Info.NameLookupTableData = 0; 965 } 966 967 return false; 968} 969 970void ASTReader::Error(StringRef Msg) { 971 Error(diag::err_fe_pch_malformed, Msg); 972} 973 974void ASTReader::Error(unsigned DiagID, 975 StringRef Arg1, StringRef Arg2) { 976 if (Diags.isDiagnosticInFlight()) 977 Diags.SetDelayedDiagnostic(DiagID, Arg1, Arg2); 978 else 979 Diag(DiagID) << Arg1 << Arg2; 980} 981 982/// \brief Tell the AST listener about the predefines buffers in the chain. 983bool ASTReader::CheckPredefinesBuffers() { 984 if (Listener) 985 return Listener->ReadPredefinesBuffer(PCHPredefinesBuffers, 986 ActualOriginalFileName, 987 SuggestedPredefines, 988 FileMgr); 989 return false; 990} 991 992//===----------------------------------------------------------------------===// 993// Source Manager Deserialization 994//===----------------------------------------------------------------------===// 995 996/// \brief Read the line table in the source manager block. 997/// \returns true if there was an error. 998bool ASTReader::ParseLineTable(Module &F, 999 SmallVectorImpl<uint64_t> &Record) { 1000 unsigned Idx = 0; 1001 LineTableInfo &LineTable = SourceMgr.getLineTable(); 1002 1003 // Parse the file names 1004 std::map<int, int> FileIDs; 1005 for (int I = 0, N = Record[Idx++]; I != N; ++I) { 1006 // Extract the file name 1007 unsigned FilenameLen = Record[Idx++]; 1008 std::string Filename(&Record[Idx], &Record[Idx] + FilenameLen); 1009 Idx += FilenameLen; 1010 MaybeAddSystemRootToFilename(Filename); 1011 FileIDs[I] = LineTable.getLineTableFilenameID(Filename); 1012 } 1013 1014 // Parse the line entries 1015 std::vector<LineEntry> Entries; 1016 while (Idx < Record.size()) { 1017 int FID = Record[Idx++]; 1018 assert(FID >= 0 && "Serialized line entries for non-local file."); 1019 // Remap FileID from 1-based old view. 1020 FID += F.SLocEntryBaseID - 1; 1021 1022 // Extract the line entries 1023 unsigned NumEntries = Record[Idx++]; 1024 assert(NumEntries && "Numentries is 00000"); 1025 Entries.clear(); 1026 Entries.reserve(NumEntries); 1027 for (unsigned I = 0; I != NumEntries; ++I) { 1028 unsigned FileOffset = Record[Idx++]; 1029 unsigned LineNo = Record[Idx++]; 1030 int FilenameID = FileIDs[Record[Idx++]]; 1031 SrcMgr::CharacteristicKind FileKind 1032 = (SrcMgr::CharacteristicKind)Record[Idx++]; 1033 unsigned IncludeOffset = Record[Idx++]; 1034 Entries.push_back(LineEntry::get(FileOffset, LineNo, FilenameID, 1035 FileKind, IncludeOffset)); 1036 } 1037 LineTable.AddEntry(FID, Entries); 1038 } 1039 1040 return false; 1041} 1042 1043namespace { 1044 1045class ASTStatData { 1046public: 1047 const ino_t ino; 1048 const dev_t dev; 1049 const mode_t mode; 1050 const time_t mtime; 1051 const off_t size; 1052 1053 ASTStatData(ino_t i, dev_t d, mode_t mo, time_t m, off_t s) 1054 : ino(i), dev(d), mode(mo), mtime(m), size(s) {} 1055}; 1056 1057class ASTStatLookupTrait { 1058 public: 1059 typedef const char *external_key_type; 1060 typedef const char *internal_key_type; 1061 1062 typedef ASTStatData data_type; 1063 1064 static unsigned ComputeHash(const char *path) { 1065 return llvm::HashString(path); 1066 } 1067 1068 static internal_key_type GetInternalKey(const char *path) { return path; } 1069 1070 static bool EqualKey(internal_key_type a, internal_key_type b) { 1071 return strcmp(a, b) == 0; 1072 } 1073 1074 static std::pair<unsigned, unsigned> 1075 ReadKeyDataLength(const unsigned char*& d) { 1076 unsigned KeyLen = (unsigned) clang::io::ReadUnalignedLE16(d); 1077 unsigned DataLen = (unsigned) *d++; 1078 return std::make_pair(KeyLen + 1, DataLen); 1079 } 1080 1081 static internal_key_type ReadKey(const unsigned char *d, unsigned) { 1082 return (const char *)d; 1083 } 1084 1085 static data_type ReadData(const internal_key_type, const unsigned char *d, 1086 unsigned /*DataLen*/) { 1087 using namespace clang::io; 1088 1089 ino_t ino = (ino_t) ReadUnalignedLE32(d); 1090 dev_t dev = (dev_t) ReadUnalignedLE32(d); 1091 mode_t mode = (mode_t) ReadUnalignedLE16(d); 1092 time_t mtime = (time_t) ReadUnalignedLE64(d); 1093 off_t size = (off_t) ReadUnalignedLE64(d); 1094 return data_type(ino, dev, mode, mtime, size); 1095 } 1096}; 1097 1098/// \brief stat() cache for precompiled headers. 1099/// 1100/// This cache is very similar to the stat cache used by pretokenized 1101/// headers. 1102class ASTStatCache : public FileSystemStatCache { 1103 typedef OnDiskChainedHashTable<ASTStatLookupTrait> CacheTy; 1104 CacheTy *Cache; 1105 1106 unsigned &NumStatHits, &NumStatMisses; 1107public: 1108 ASTStatCache(const unsigned char *Buckets, const unsigned char *Base, 1109 unsigned &NumStatHits, unsigned &NumStatMisses) 1110 : Cache(0), NumStatHits(NumStatHits), NumStatMisses(NumStatMisses) { 1111 Cache = CacheTy::Create(Buckets, Base); 1112 } 1113 1114 ~ASTStatCache() { delete Cache; } 1115 1116 LookupResult getStat(const char *Path, struct stat &StatBuf, 1117 int *FileDescriptor) { 1118 // Do the lookup for the file's data in the AST file. 1119 CacheTy::iterator I = Cache->find(Path); 1120 1121 // If we don't get a hit in the AST file just forward to 'stat'. 1122 if (I == Cache->end()) { 1123 ++NumStatMisses; 1124 return statChained(Path, StatBuf, FileDescriptor); 1125 } 1126 1127 ++NumStatHits; 1128 ASTStatData Data = *I; 1129 1130 StatBuf.st_ino = Data.ino; 1131 StatBuf.st_dev = Data.dev; 1132 StatBuf.st_mtime = Data.mtime; 1133 StatBuf.st_mode = Data.mode; 1134 StatBuf.st_size = Data.size; 1135 return CacheExists; 1136 } 1137}; 1138} // end anonymous namespace 1139 1140 1141/// \brief Read a source manager block 1142ASTReader::ASTReadResult ASTReader::ReadSourceManagerBlock(Module &F) { 1143 using namespace SrcMgr; 1144 1145 llvm::BitstreamCursor &SLocEntryCursor = F.SLocEntryCursor; 1146 1147 // Set the source-location entry cursor to the current position in 1148 // the stream. This cursor will be used to read the contents of the 1149 // source manager block initially, and then lazily read 1150 // source-location entries as needed. 1151 SLocEntryCursor = F.Stream; 1152 1153 // The stream itself is going to skip over the source manager block. 1154 if (F.Stream.SkipBlock()) { 1155 Error("malformed block record in AST file"); 1156 return Failure; 1157 } 1158 1159 // Enter the source manager block. 1160 if (SLocEntryCursor.EnterSubBlock(SOURCE_MANAGER_BLOCK_ID)) { 1161 Error("malformed source manager block record in AST file"); 1162 return Failure; 1163 } 1164 1165 RecordData Record; 1166 while (true) { 1167 unsigned Code = SLocEntryCursor.ReadCode(); 1168 if (Code == llvm::bitc::END_BLOCK) { 1169 if (SLocEntryCursor.ReadBlockEnd()) { 1170 Error("error at end of Source Manager block in AST file"); 1171 return Failure; 1172 } 1173 return Success; 1174 } 1175 1176 if (Code == llvm::bitc::ENTER_SUBBLOCK) { 1177 // No known subblocks, always skip them. 1178 SLocEntryCursor.ReadSubBlockID(); 1179 if (SLocEntryCursor.SkipBlock()) { 1180 Error("malformed block record in AST file"); 1181 return Failure; 1182 } 1183 continue; 1184 } 1185 1186 if (Code == llvm::bitc::DEFINE_ABBREV) { 1187 SLocEntryCursor.ReadAbbrevRecord(); 1188 continue; 1189 } 1190 1191 // Read a record. 1192 const char *BlobStart; 1193 unsigned BlobLen; 1194 Record.clear(); 1195 switch (SLocEntryCursor.ReadRecord(Code, Record, &BlobStart, &BlobLen)) { 1196 default: // Default behavior: ignore. 1197 break; 1198 1199 case SM_SLOC_FILE_ENTRY: 1200 case SM_SLOC_BUFFER_ENTRY: 1201 case SM_SLOC_EXPANSION_ENTRY: 1202 // Once we hit one of the source location entries, we're done. 1203 return Success; 1204 } 1205 } 1206} 1207 1208/// \brief If a header file is not found at the path that we expect it to be 1209/// and the PCH file was moved from its original location, try to resolve the 1210/// file by assuming that header+PCH were moved together and the header is in 1211/// the same place relative to the PCH. 1212static std::string 1213resolveFileRelativeToOriginalDir(const std::string &Filename, 1214 const std::string &OriginalDir, 1215 const std::string &CurrDir) { 1216 assert(OriginalDir != CurrDir && 1217 "No point trying to resolve the file if the PCH dir didn't change"); 1218 using namespace llvm::sys; 1219 llvm::SmallString<128> filePath(Filename); 1220 fs::make_absolute(filePath); 1221 assert(path::is_absolute(OriginalDir)); 1222 llvm::SmallString<128> currPCHPath(CurrDir); 1223 1224 path::const_iterator fileDirI = path::begin(path::parent_path(filePath)), 1225 fileDirE = path::end(path::parent_path(filePath)); 1226 path::const_iterator origDirI = path::begin(OriginalDir), 1227 origDirE = path::end(OriginalDir); 1228 // Skip the common path components from filePath and OriginalDir. 1229 while (fileDirI != fileDirE && origDirI != origDirE && 1230 *fileDirI == *origDirI) { 1231 ++fileDirI; 1232 ++origDirI; 1233 } 1234 for (; origDirI != origDirE; ++origDirI) 1235 path::append(currPCHPath, ".."); 1236 path::append(currPCHPath, fileDirI, fileDirE); 1237 path::append(currPCHPath, path::filename(Filename)); 1238 return currPCHPath.str(); 1239} 1240 1241/// \brief Read in the source location entry with the given ID. 1242ASTReader::ASTReadResult ASTReader::ReadSLocEntryRecord(int ID) { 1243 if (ID == 0) 1244 return Success; 1245 1246 if (unsigned(-ID) - 2 >= getTotalNumSLocs() || ID > 0) { 1247 Error("source location entry ID out-of-range for AST file"); 1248 return Failure; 1249 } 1250 1251 Module *F = GlobalSLocEntryMap.find(-ID)->second; 1252 F->SLocEntryCursor.JumpToBit(F->SLocEntryOffsets[ID - F->SLocEntryBaseID]); 1253 llvm::BitstreamCursor &SLocEntryCursor = F->SLocEntryCursor; 1254 unsigned BaseOffset = F->SLocEntryBaseOffset; 1255 1256 ++NumSLocEntriesRead; 1257 unsigned Code = SLocEntryCursor.ReadCode(); 1258 if (Code == llvm::bitc::END_BLOCK || 1259 Code == llvm::bitc::ENTER_SUBBLOCK || 1260 Code == llvm::bitc::DEFINE_ABBREV) { 1261 Error("incorrectly-formatted source location entry in AST file"); 1262 return Failure; 1263 } 1264 1265 RecordData Record; 1266 const char *BlobStart; 1267 unsigned BlobLen; 1268 switch (SLocEntryCursor.ReadRecord(Code, Record, &BlobStart, &BlobLen)) { 1269 default: 1270 Error("incorrectly-formatted source location entry in AST file"); 1271 return Failure; 1272 1273 case SM_SLOC_FILE_ENTRY: { 1274 std::string Filename(BlobStart, BlobStart + BlobLen); 1275 MaybeAddSystemRootToFilename(Filename); 1276 const FileEntry *File = FileMgr.getFile(Filename); 1277 if (File == 0 && !OriginalDir.empty() && !CurrentDir.empty() && 1278 OriginalDir != CurrentDir) { 1279 std::string resolved = resolveFileRelativeToOriginalDir(Filename, 1280 OriginalDir, 1281 CurrentDir); 1282 if (!resolved.empty()) 1283 File = FileMgr.getFile(resolved); 1284 } 1285 if (File == 0) 1286 File = FileMgr.getVirtualFile(Filename, (off_t)Record[4], 1287 (time_t)Record[5]); 1288 if (File == 0) { 1289 std::string ErrorStr = "could not find file '"; 1290 ErrorStr += Filename; 1291 ErrorStr += "' referenced by AST file"; 1292 Error(ErrorStr.c_str()); 1293 return Failure; 1294 } 1295 1296 if (Record.size() < 6) { 1297 Error("source location entry is incorrect"); 1298 return Failure; 1299 } 1300 1301 if (!DisableValidation && 1302 ((off_t)Record[4] != File->getSize() 1303#if !defined(LLVM_ON_WIN32) 1304 // In our regression testing, the Windows file system seems to 1305 // have inconsistent modification times that sometimes 1306 // erroneously trigger this error-handling path. 1307 || (time_t)Record[5] != File->getModificationTime() 1308#endif 1309 )) { 1310 Error(diag::err_fe_pch_file_modified, Filename); 1311 return Failure; 1312 } 1313 1314 SourceLocation IncludeLoc = ReadSourceLocation(*F, Record[1]); 1315 if (IncludeLoc.isInvalid() && F->Kind != MK_MainFile) { 1316 // This is the module's main file. 1317 IncludeLoc = getImportLocation(F); 1318 } 1319 FileID FID = SourceMgr.createFileID(File, IncludeLoc, 1320 (SrcMgr::CharacteristicKind)Record[2], 1321 ID, BaseOffset + Record[0]); 1322 if (Record[3]) 1323 const_cast<SrcMgr::FileInfo&>(SourceMgr.getSLocEntry(FID).getFile()) 1324 .setHasLineDirectives(); 1325 1326 break; 1327 } 1328 1329 case SM_SLOC_BUFFER_ENTRY: { 1330 const char *Name = BlobStart; 1331 unsigned Offset = Record[0]; 1332 unsigned Code = SLocEntryCursor.ReadCode(); 1333 Record.clear(); 1334 unsigned RecCode 1335 = SLocEntryCursor.ReadRecord(Code, Record, &BlobStart, &BlobLen); 1336 1337 if (RecCode != SM_SLOC_BUFFER_BLOB) { 1338 Error("AST record has invalid code"); 1339 return Failure; 1340 } 1341 1342 llvm::MemoryBuffer *Buffer 1343 = llvm::MemoryBuffer::getMemBuffer(StringRef(BlobStart, BlobLen - 1), 1344 Name); 1345 FileID BufferID = SourceMgr.createFileIDForMemBuffer(Buffer, ID, 1346 BaseOffset + Offset); 1347 1348 if (strcmp(Name, "<built-in>") == 0) { 1349 PCHPredefinesBlock Block = { 1350 BufferID, 1351 StringRef(BlobStart, BlobLen - 1) 1352 }; 1353 PCHPredefinesBuffers.push_back(Block); 1354 } 1355 1356 break; 1357 } 1358 1359 case SM_SLOC_EXPANSION_ENTRY: { 1360 SourceLocation SpellingLoc = ReadSourceLocation(*F, Record[1]); 1361 SourceMgr.createExpansionLoc(SpellingLoc, 1362 ReadSourceLocation(*F, Record[2]), 1363 ReadSourceLocation(*F, Record[3]), 1364 Record[4], 1365 ID, 1366 BaseOffset + Record[0]); 1367 break; 1368 } 1369 } 1370 1371 return Success; 1372} 1373 1374/// \brief Find the location where the module F is imported. 1375SourceLocation ASTReader::getImportLocation(Module *F) { 1376 if (F->ImportLoc.isValid()) 1377 return F->ImportLoc; 1378 1379 // Otherwise we have a PCH. It's considered to be "imported" at the first 1380 // location of its includer. 1381 if (F->ImportedBy.empty() || !F->ImportedBy[0]) { 1382 // Main file is the importer. We assume that it is the first entry in the 1383 // entry table. We can't ask the manager, because at the time of PCH loading 1384 // the main file entry doesn't exist yet. 1385 // The very first entry is the invalid instantiation loc, which takes up 1386 // offsets 0 and 1. 1387 return SourceLocation::getFromRawEncoding(2U); 1388 } 1389 //return F->Loaders[0]->FirstLoc; 1390 return F->ImportedBy[0]->FirstLoc; 1391} 1392 1393/// ReadBlockAbbrevs - Enter a subblock of the specified BlockID with the 1394/// specified cursor. Read the abbreviations that are at the top of the block 1395/// and then leave the cursor pointing into the block. 1396bool ASTReader::ReadBlockAbbrevs(llvm::BitstreamCursor &Cursor, 1397 unsigned BlockID) { 1398 if (Cursor.EnterSubBlock(BlockID)) { 1399 Error("malformed block record in AST file"); 1400 return Failure; 1401 } 1402 1403 while (true) { 1404 uint64_t Offset = Cursor.GetCurrentBitNo(); 1405 unsigned Code = Cursor.ReadCode(); 1406 1407 // We expect all abbrevs to be at the start of the block. 1408 if (Code != llvm::bitc::DEFINE_ABBREV) { 1409 Cursor.JumpToBit(Offset); 1410 return false; 1411 } 1412 Cursor.ReadAbbrevRecord(); 1413 } 1414} 1415 1416void ASTReader::ReadMacroRecord(Module &F, uint64_t Offset) { 1417 assert(PP && "Forgot to set Preprocessor ?"); 1418 llvm::BitstreamCursor &Stream = F.MacroCursor; 1419 1420 // Keep track of where we are in the stream, then jump back there 1421 // after reading this macro. 1422 SavedStreamPosition SavedPosition(Stream); 1423 1424 Stream.JumpToBit(Offset); 1425 RecordData Record; 1426 SmallVector<IdentifierInfo*, 16> MacroArgs; 1427 MacroInfo *Macro = 0; 1428 1429 while (true) { 1430 unsigned Code = Stream.ReadCode(); 1431 switch (Code) { 1432 case llvm::bitc::END_BLOCK: 1433 return; 1434 1435 case llvm::bitc::ENTER_SUBBLOCK: 1436 // No known subblocks, always skip them. 1437 Stream.ReadSubBlockID(); 1438 if (Stream.SkipBlock()) { 1439 Error("malformed block record in AST file"); 1440 return; 1441 } 1442 continue; 1443 1444 case llvm::bitc::DEFINE_ABBREV: 1445 Stream.ReadAbbrevRecord(); 1446 continue; 1447 default: break; 1448 } 1449 1450 // Read a record. 1451 const char *BlobStart = 0; 1452 unsigned BlobLen = 0; 1453 Record.clear(); 1454 PreprocessorRecordTypes RecType = 1455 (PreprocessorRecordTypes)Stream.ReadRecord(Code, Record, BlobStart, 1456 BlobLen); 1457 switch (RecType) { 1458 case PP_MACRO_OBJECT_LIKE: 1459 case PP_MACRO_FUNCTION_LIKE: { 1460 // If we already have a macro, that means that we've hit the end 1461 // of the definition of the macro we were looking for. We're 1462 // done. 1463 if (Macro) 1464 return; 1465 1466 IdentifierInfo *II = getLocalIdentifier(F, Record[0]); 1467 if (II == 0) { 1468 Error("macro must have a name in AST file"); 1469 return; 1470 } 1471 SourceLocation Loc = ReadSourceLocation(F, Record[1]); 1472 bool isUsed = Record[2]; 1473 1474 MacroInfo *MI = PP->AllocateMacroInfo(Loc); 1475 MI->setIsUsed(isUsed); 1476 MI->setIsFromAST(); 1477 1478 unsigned NextIndex = 3; 1479 if (RecType == PP_MACRO_FUNCTION_LIKE) { 1480 // Decode function-like macro info. 1481 bool isC99VarArgs = Record[3]; 1482 bool isGNUVarArgs = Record[4]; 1483 MacroArgs.clear(); 1484 unsigned NumArgs = Record[5]; 1485 NextIndex = 6 + NumArgs; 1486 for (unsigned i = 0; i != NumArgs; ++i) 1487 MacroArgs.push_back(getLocalIdentifier(F, Record[6+i])); 1488 1489 // Install function-like macro info. 1490 MI->setIsFunctionLike(); 1491 if (isC99VarArgs) MI->setIsC99Varargs(); 1492 if (isGNUVarArgs) MI->setIsGNUVarargs(); 1493 MI->setArgumentList(MacroArgs.data(), MacroArgs.size(), 1494 PP->getPreprocessorAllocator()); 1495 } 1496 1497 // Finally, install the macro. 1498 PP->setMacroInfo(II, MI); 1499 1500 // Remember that we saw this macro last so that we add the tokens that 1501 // form its body to it. 1502 Macro = MI; 1503 1504 if (NextIndex + 1 == Record.size() && PP->getPreprocessingRecord()) { 1505 // We have a macro definition. Load it now. 1506 PP->getPreprocessingRecord()->RegisterMacroDefinition(Macro, 1507 getLocalMacroDefinition(F, Record[NextIndex])); 1508 } 1509 1510 ++NumMacrosRead; 1511 break; 1512 } 1513 1514 case PP_TOKEN: { 1515 // If we see a TOKEN before a PP_MACRO_*, then the file is 1516 // erroneous, just pretend we didn't see this. 1517 if (Macro == 0) break; 1518 1519 Token Tok; 1520 Tok.startToken(); 1521 Tok.setLocation(ReadSourceLocation(F, Record[0])); 1522 Tok.setLength(Record[1]); 1523 if (IdentifierInfo *II = getLocalIdentifier(F, Record[2])) 1524 Tok.setIdentifierInfo(II); 1525 Tok.setKind((tok::TokenKind)Record[3]); 1526 Tok.setFlag((Token::TokenFlags)Record[4]); 1527 Macro->AddTokenToBody(Tok); 1528 break; 1529 } 1530 } 1531 } 1532 1533 return; 1534} 1535 1536PreprocessedEntity *ASTReader::LoadPreprocessedEntity(Module &F) { 1537 assert(PP && "Forgot to set Preprocessor ?"); 1538 unsigned Code = F.PreprocessorDetailCursor.ReadCode(); 1539 switch (Code) { 1540 case llvm::bitc::END_BLOCK: 1541 return 0; 1542 1543 case llvm::bitc::ENTER_SUBBLOCK: 1544 Error("unexpected subblock record in preprocessor detail block"); 1545 return 0; 1546 1547 case llvm::bitc::DEFINE_ABBREV: 1548 Error("unexpected abbrevation record in preprocessor detail block"); 1549 return 0; 1550 1551 default: 1552 break; 1553 } 1554 1555 if (!PP->getPreprocessingRecord()) { 1556 Error("no preprocessing record"); 1557 return 0; 1558 } 1559 1560 // Read the record. 1561 PreprocessingRecord &PPRec = *PP->getPreprocessingRecord(); 1562 const char *BlobStart = 0; 1563 unsigned BlobLen = 0; 1564 RecordData Record; 1565 PreprocessorDetailRecordTypes RecType = 1566 (PreprocessorDetailRecordTypes)F.PreprocessorDetailCursor.ReadRecord( 1567 Code, Record, BlobStart, BlobLen); 1568 switch (RecType) { 1569 case PPD_MACRO_EXPANSION: { 1570 PreprocessedEntityID GlobalID = getGlobalPreprocessedEntityID(F, Record[0]); 1571 if (PreprocessedEntity *PE = PPRec.getLoadedPreprocessedEntity(GlobalID-1)) 1572 return PE; 1573 1574 MacroExpansion *ME = 1575 new (PPRec) MacroExpansion(getLocalIdentifier(F, Record[3]), 1576 SourceRange(ReadSourceLocation(F, Record[1]), 1577 ReadSourceLocation(F, Record[2])), 1578 getLocalMacroDefinition(F, Record[4])); 1579 PPRec.setLoadedPreallocatedEntity(GlobalID - 1, ME); 1580 return ME; 1581 } 1582 1583 case PPD_MACRO_DEFINITION: { 1584 PreprocessedEntityID GlobalID = getGlobalPreprocessedEntityID(F, Record[0]); 1585 if (PreprocessedEntity *PE = PPRec.getLoadedPreprocessedEntity(GlobalID-1)) 1586 return PE; 1587 1588 unsigned MacroDefID = getGlobalMacroDefinitionID(F, Record[1]); 1589 if (MacroDefID > MacroDefinitionsLoaded.size()) { 1590 Error("out-of-bounds macro definition record"); 1591 return 0; 1592 } 1593 1594 // Decode the identifier info and then check again; if the macro is 1595 // still defined and associated with the identifier, 1596 IdentifierInfo *II = getLocalIdentifier(F, Record[4]); 1597 if (!MacroDefinitionsLoaded[MacroDefID - 1]) { 1598 MacroDefinition *MD 1599 = new (PPRec) MacroDefinition(II, 1600 ReadSourceLocation(F, Record[5]), 1601 SourceRange( 1602 ReadSourceLocation(F, Record[2]), 1603 ReadSourceLocation(F, Record[3]))); 1604 1605 PPRec.setLoadedPreallocatedEntity(GlobalID - 1, MD); 1606 MacroDefinitionsLoaded[MacroDefID - 1] = MD; 1607 1608 if (DeserializationListener) 1609 DeserializationListener->MacroDefinitionRead(MacroDefID, MD); 1610 } 1611 1612 return MacroDefinitionsLoaded[MacroDefID - 1]; 1613 } 1614 1615 case PPD_INCLUSION_DIRECTIVE: { 1616 PreprocessedEntityID GlobalID = getGlobalPreprocessedEntityID(F, Record[0]); 1617 if (PreprocessedEntity *PE = PPRec.getLoadedPreprocessedEntity(GlobalID-1)) 1618 return PE; 1619 1620 const char *FullFileNameStart = BlobStart + Record[3]; 1621 const FileEntry *File 1622 = PP->getFileManager().getFile(StringRef(FullFileNameStart, 1623 BlobLen - Record[3])); 1624 1625 // FIXME: Stable encoding 1626 InclusionDirective::InclusionKind Kind 1627 = static_cast<InclusionDirective::InclusionKind>(Record[5]); 1628 InclusionDirective *ID 1629 = new (PPRec) InclusionDirective(PPRec, Kind, 1630 StringRef(BlobStart, Record[3]), 1631 Record[4], 1632 File, 1633 SourceRange(ReadSourceLocation(F, Record[1]), 1634 ReadSourceLocation(F, Record[2]))); 1635 PPRec.setLoadedPreallocatedEntity(GlobalID - 1, ID); 1636 return ID; 1637 } 1638 } 1639 1640 Error("invalid offset in preprocessor detail block"); 1641 return 0; 1642} 1643 1644PreprocessedEntityID 1645ASTReader::getGlobalPreprocessedEntityID(Module &M, unsigned LocalID) { 1646 ContinuousRangeMap<uint32_t, int, 2>::iterator 1647 I = M.PreprocessedEntityRemap.find(LocalID - NUM_PREDEF_PP_ENTITY_IDS); 1648 assert(I != M.PreprocessedEntityRemap.end() 1649 && "Invalid index into preprocessed entity index remap"); 1650 1651 return LocalID + I->second; 1652} 1653 1654namespace { 1655 /// \brief Trait class used to search the on-disk hash table containing all of 1656 /// the header search information. 1657 /// 1658 /// The on-disk hash table contains a mapping from each header path to 1659 /// information about that header (how many times it has been included, its 1660 /// controlling macro, etc.). Note that we actually hash based on the 1661 /// filename, and support "deep" comparisons of file names based on current 1662 /// inode numbers, so that the search can cope with non-normalized path names 1663 /// and symlinks. 1664 class HeaderFileInfoTrait { 1665 ASTReader &Reader; 1666 Module &M; 1667 HeaderSearch *HS; 1668 const char *FrameworkStrings; 1669 const char *SearchPath; 1670 struct stat SearchPathStatBuf; 1671 llvm::Optional<int> SearchPathStatResult; 1672 1673 int StatSimpleCache(const char *Path, struct stat *StatBuf) { 1674 if (Path == SearchPath) { 1675 if (!SearchPathStatResult) 1676 SearchPathStatResult = stat(Path, &SearchPathStatBuf); 1677 1678 *StatBuf = SearchPathStatBuf; 1679 return *SearchPathStatResult; 1680 } 1681 1682 return stat(Path, StatBuf); 1683 } 1684 1685 public: 1686 typedef const char *external_key_type; 1687 typedef const char *internal_key_type; 1688 1689 typedef HeaderFileInfo data_type; 1690 1691 HeaderFileInfoTrait(ASTReader &Reader, Module &M, HeaderSearch *HS, 1692 const char *FrameworkStrings, 1693 const char *SearchPath = 0) 1694 : Reader(Reader), M(M), HS(HS), FrameworkStrings(FrameworkStrings), 1695 SearchPath(SearchPath) { } 1696 1697 static unsigned ComputeHash(const char *path) { 1698 return llvm::HashString(llvm::sys::path::filename(path)); 1699 } 1700 1701 static internal_key_type GetInternalKey(const char *path) { return path; } 1702 1703 bool EqualKey(internal_key_type a, internal_key_type b) { 1704 if (strcmp(a, b) == 0) 1705 return true; 1706 1707 if (llvm::sys::path::filename(a) != llvm::sys::path::filename(b)) 1708 return false; 1709 1710 // The file names match, but the path names don't. stat() the files to 1711 // see if they are the same. 1712 struct stat StatBufA, StatBufB; 1713 if (StatSimpleCache(a, &StatBufA) || StatSimpleCache(b, &StatBufB)) 1714 return false; 1715 1716 return StatBufA.st_ino == StatBufB.st_ino; 1717 } 1718 1719 static std::pair<unsigned, unsigned> 1720 ReadKeyDataLength(const unsigned char*& d) { 1721 unsigned KeyLen = (unsigned) clang::io::ReadUnalignedLE16(d); 1722 unsigned DataLen = (unsigned) *d++; 1723 return std::make_pair(KeyLen + 1, DataLen); 1724 } 1725 1726 static internal_key_type ReadKey(const unsigned char *d, unsigned) { 1727 return (const char *)d; 1728 } 1729 1730 data_type ReadData(const internal_key_type, const unsigned char *d, 1731 unsigned DataLen) { 1732 const unsigned char *End = d + DataLen; 1733 using namespace clang::io; 1734 HeaderFileInfo HFI; 1735 unsigned Flags = *d++; 1736 HFI.isImport = (Flags >> 5) & 0x01; 1737 HFI.isPragmaOnce = (Flags >> 4) & 0x01; 1738 HFI.DirInfo = (Flags >> 2) & 0x03; 1739 HFI.Resolved = (Flags >> 1) & 0x01; 1740 HFI.IndexHeaderMapHeader = Flags & 0x01; 1741 HFI.NumIncludes = ReadUnalignedLE16(d); 1742 HFI.ControllingMacroID = Reader.getGlobalDeclID(M, ReadUnalignedLE32(d)); 1743 if (unsigned FrameworkOffset = ReadUnalignedLE32(d)) { 1744 // The framework offset is 1 greater than the actual offset, 1745 // since 0 is used as an indicator for "no framework name". 1746 StringRef FrameworkName(FrameworkStrings + FrameworkOffset - 1); 1747 HFI.Framework = HS->getUniqueFrameworkName(FrameworkName); 1748 } 1749 1750 assert(End == d && "Wrong data length in HeaderFileInfo deserialization"); 1751 (void)End; 1752 1753 // This HeaderFileInfo was externally loaded. 1754 HFI.External = true; 1755 return HFI; 1756 } 1757 }; 1758} 1759 1760/// \brief The on-disk hash table used for the global method pool. 1761typedef OnDiskChainedHashTable<HeaderFileInfoTrait> 1762 HeaderFileInfoLookupTable; 1763 1764void ASTReader::SetIdentifierIsMacro(IdentifierInfo *II, Module &F, 1765 uint64_t LocalOffset) { 1766 // Note that this identifier has a macro definition. 1767 II->setHasMacroDefinition(true); 1768 1769 // Adjust the offset to a global offset. 1770 UnreadMacroRecordOffsets[II] = F.GlobalBitOffset + LocalOffset; 1771} 1772 1773void ASTReader::ReadDefinedMacros() { 1774 for (ModuleReverseIterator I = ModuleMgr.rbegin(), 1775 E = ModuleMgr.rend(); I != E; ++I) { 1776 llvm::BitstreamCursor &MacroCursor = (*I)->MacroCursor; 1777 1778 // If there was no preprocessor block, skip this file. 1779 if (!MacroCursor.getBitStreamReader()) 1780 continue; 1781 1782 llvm::BitstreamCursor Cursor = MacroCursor; 1783 Cursor.JumpToBit((*I)->MacroStartOffset); 1784 1785 RecordData Record; 1786 while (true) { 1787 unsigned Code = Cursor.ReadCode(); 1788 if (Code == llvm::bitc::END_BLOCK) 1789 break; 1790 1791 if (Code == llvm::bitc::ENTER_SUBBLOCK) { 1792 // No known subblocks, always skip them. 1793 Cursor.ReadSubBlockID(); 1794 if (Cursor.SkipBlock()) { 1795 Error("malformed block record in AST file"); 1796 return; 1797 } 1798 continue; 1799 } 1800 1801 if (Code == llvm::bitc::DEFINE_ABBREV) { 1802 Cursor.ReadAbbrevRecord(); 1803 continue; 1804 } 1805 1806 // Read a record. 1807 const char *BlobStart; 1808 unsigned BlobLen; 1809 Record.clear(); 1810 switch (Cursor.ReadRecord(Code, Record, &BlobStart, &BlobLen)) { 1811 default: // Default behavior: ignore. 1812 break; 1813 1814 case PP_MACRO_OBJECT_LIKE: 1815 case PP_MACRO_FUNCTION_LIKE: 1816 getLocalIdentifier(**I, Record[0]); 1817 break; 1818 1819 case PP_TOKEN: 1820 // Ignore tokens. 1821 break; 1822 } 1823 } 1824 } 1825 1826 // Drain the unread macro-record offsets map. 1827 while (!UnreadMacroRecordOffsets.empty()) 1828 LoadMacroDefinition(UnreadMacroRecordOffsets.begin()); 1829} 1830 1831void ASTReader::LoadMacroDefinition( 1832 llvm::DenseMap<IdentifierInfo *, uint64_t>::iterator Pos) { 1833 assert(Pos != UnreadMacroRecordOffsets.end() && "Unknown macro definition"); 1834 uint64_t Offset = Pos->second; 1835 UnreadMacroRecordOffsets.erase(Pos); 1836 1837 RecordLocation Loc = getLocalBitOffset(Offset); 1838 ReadMacroRecord(*Loc.F, Loc.Offset); 1839} 1840 1841void ASTReader::LoadMacroDefinition(IdentifierInfo *II) { 1842 llvm::DenseMap<IdentifierInfo *, uint64_t>::iterator Pos 1843 = UnreadMacroRecordOffsets.find(II); 1844 LoadMacroDefinition(Pos); 1845} 1846 1847MacroDefinition *ASTReader::getMacroDefinition(MacroID ID) { 1848 if (ID == 0 || ID > MacroDefinitionsLoaded.size()) 1849 return 0; 1850 1851 if (!MacroDefinitionsLoaded[ID - 1]) { 1852 GlobalMacroDefinitionMapType::iterator I =GlobalMacroDefinitionMap.find(ID); 1853 assert(I != GlobalMacroDefinitionMap.end() && 1854 "Corrupted global macro definition map"); 1855 Module &M = *I->second; 1856 unsigned Index = ID - 1 - M.BaseMacroDefinitionID; 1857 SavedStreamPosition SavedPosition(M.PreprocessorDetailCursor); 1858 M.PreprocessorDetailCursor.JumpToBit(M.MacroDefinitionOffsets[Index]); 1859 LoadPreprocessedEntity(M); 1860 } 1861 1862 return MacroDefinitionsLoaded[ID - 1]; 1863} 1864 1865const FileEntry *ASTReader::getFileEntry(StringRef filenameStrRef) { 1866 std::string Filename = filenameStrRef; 1867 MaybeAddSystemRootToFilename(Filename); 1868 const FileEntry *File = FileMgr.getFile(Filename); 1869 if (File == 0 && !OriginalDir.empty() && !CurrentDir.empty() && 1870 OriginalDir != CurrentDir) { 1871 std::string resolved = resolveFileRelativeToOriginalDir(Filename, 1872 OriginalDir, 1873 CurrentDir); 1874 if (!resolved.empty()) 1875 File = FileMgr.getFile(resolved); 1876 } 1877 1878 return File; 1879} 1880 1881MacroID ASTReader::getGlobalMacroDefinitionID(Module &M, unsigned LocalID) { 1882 if (LocalID < NUM_PREDEF_MACRO_IDS) 1883 return LocalID; 1884 1885 ContinuousRangeMap<uint32_t, int, 2>::iterator I 1886 = M.MacroDefinitionRemap.find(LocalID - NUM_PREDEF_MACRO_IDS); 1887 assert(I != M.MacroDefinitionRemap.end() && 1888 "Invalid index into macro definition ID remap"); 1889 1890 return LocalID + I->second; 1891} 1892 1893/// \brief If we are loading a relocatable PCH file, and the filename is 1894/// not an absolute path, add the system root to the beginning of the file 1895/// name. 1896void ASTReader::MaybeAddSystemRootToFilename(std::string &Filename) { 1897 // If this is not a relocatable PCH file, there's nothing to do. 1898 if (!RelocatablePCH) 1899 return; 1900 1901 if (Filename.empty() || llvm::sys::path::is_absolute(Filename)) 1902 return; 1903 1904 if (isysroot.empty()) { 1905 // If no system root was given, default to '/' 1906 Filename.insert(Filename.begin(), '/'); 1907 return; 1908 } 1909 1910 unsigned Length = isysroot.size(); 1911 if (isysroot[Length - 1] != '/') 1912 Filename.insert(Filename.begin(), '/'); 1913 1914 Filename.insert(Filename.begin(), isysroot.begin(), isysroot.end()); 1915} 1916 1917ASTReader::ASTReadResult 1918ASTReader::ReadASTBlock(Module &F) { 1919 llvm::BitstreamCursor &Stream = F.Stream; 1920 1921 if (Stream.EnterSubBlock(AST_BLOCK_ID)) { 1922 Error("malformed block record in AST file"); 1923 return Failure; 1924 } 1925 1926 // Read all of the records and blocks for the ASt file. 1927 RecordData Record; 1928 bool First = true; 1929 while (!Stream.AtEndOfStream()) { 1930 unsigned Code = Stream.ReadCode(); 1931 if (Code == llvm::bitc::END_BLOCK) { 1932 if (Stream.ReadBlockEnd()) { 1933 Error("error at end of module block in AST file"); 1934 return Failure; 1935 } 1936 1937 return Success; 1938 } 1939 1940 if (Code == llvm::bitc::ENTER_SUBBLOCK) { 1941 switch (Stream.ReadSubBlockID()) { 1942 case DECLTYPES_BLOCK_ID: 1943 // We lazily load the decls block, but we want to set up the 1944 // DeclsCursor cursor to point into it. Clone our current bitcode 1945 // cursor to it, enter the block and read the abbrevs in that block. 1946 // With the main cursor, we just skip over it. 1947 F.DeclsCursor = Stream; 1948 if (Stream.SkipBlock() || // Skip with the main cursor. 1949 // Read the abbrevs. 1950 ReadBlockAbbrevs(F.DeclsCursor, DECLTYPES_BLOCK_ID)) { 1951 Error("malformed block record in AST file"); 1952 return Failure; 1953 } 1954 break; 1955 1956 case DECL_UPDATES_BLOCK_ID: 1957 if (Stream.SkipBlock()) { 1958 Error("malformed block record in AST file"); 1959 return Failure; 1960 } 1961 break; 1962 1963 case PREPROCESSOR_BLOCK_ID: 1964 F.MacroCursor = Stream; 1965 if (PP) 1966 PP->setExternalSource(this); 1967 1968 if (Stream.SkipBlock() || 1969 ReadBlockAbbrevs(F.MacroCursor, PREPROCESSOR_BLOCK_ID)) { 1970 Error("malformed block record in AST file"); 1971 return Failure; 1972 } 1973 F.MacroStartOffset = F.MacroCursor.GetCurrentBitNo(); 1974 break; 1975 1976 case PREPROCESSOR_DETAIL_BLOCK_ID: 1977 F.PreprocessorDetailCursor = Stream; 1978 if (Stream.SkipBlock() || 1979 ReadBlockAbbrevs(F.PreprocessorDetailCursor, 1980 PREPROCESSOR_DETAIL_BLOCK_ID)) { 1981 Error("malformed preprocessor detail record in AST file"); 1982 return Failure; 1983 } 1984 F.PreprocessorDetailStartOffset 1985 = F.PreprocessorDetailCursor.GetCurrentBitNo(); 1986 break; 1987 1988 case SOURCE_MANAGER_BLOCK_ID: 1989 switch (ReadSourceManagerBlock(F)) { 1990 case Success: 1991 break; 1992 1993 case Failure: 1994 Error("malformed source manager block in AST file"); 1995 return Failure; 1996 1997 case IgnorePCH: 1998 return IgnorePCH; 1999 } 2000 break; 2001 } 2002 First = false; 2003 continue; 2004 } 2005 2006 if (Code == llvm::bitc::DEFINE_ABBREV) { 2007 Stream.ReadAbbrevRecord(); 2008 continue; 2009 } 2010 2011 // Read and process a record. 2012 Record.clear(); 2013 const char *BlobStart = 0; 2014 unsigned BlobLen = 0; 2015 switch ((ASTRecordTypes)Stream.ReadRecord(Code, Record, 2016 &BlobStart, &BlobLen)) { 2017 default: // Default behavior: ignore. 2018 break; 2019 2020 case METADATA: { 2021 if (Record[0] != VERSION_MAJOR && !DisableValidation) { 2022 Diag(Record[0] < VERSION_MAJOR? diag::warn_pch_version_too_old 2023 : diag::warn_pch_version_too_new); 2024 return IgnorePCH; 2025 } 2026 2027 RelocatablePCH = Record[4]; 2028 if (Listener) { 2029 std::string TargetTriple(BlobStart, BlobLen); 2030 if (Listener->ReadTargetTriple(TargetTriple)) 2031 return IgnorePCH; 2032 } 2033 break; 2034 } 2035 2036 case CHAINED_METADATA: { 2037 if (!First) { 2038 Error("CHAINED_METADATA is not first record in block"); 2039 return Failure; 2040 } 2041 if (Record[0] != VERSION_MAJOR && !DisableValidation) { 2042 Diag(Record[0] < VERSION_MAJOR? diag::warn_pch_version_too_old 2043 : diag::warn_pch_version_too_new); 2044 return IgnorePCH; 2045 } 2046 2047 // Load the chained file, which is always a PCH file. 2048 // FIXME: This could end up being a module. 2049 switch(ReadASTCore(StringRef(BlobStart, BlobLen), MK_PCH)) { 2050 case Failure: return Failure; 2051 // If we have to ignore the dependency, we'll have to ignore this too. 2052 case IgnorePCH: return IgnorePCH; 2053 case Success: break; 2054 } 2055 break; 2056 } 2057 2058 case TYPE_OFFSET: { 2059 if (F.LocalNumTypes != 0) { 2060 Error("duplicate TYPE_OFFSET record in AST file"); 2061 return Failure; 2062 } 2063 F.TypeOffsets = (const uint32_t *)BlobStart; 2064 F.LocalNumTypes = Record[0]; 2065 unsigned LocalBaseTypeIndex = Record[1]; 2066 F.BaseTypeIndex = getTotalNumTypes(); 2067 2068 if (F.LocalNumTypes > 0) { 2069 // Introduce the global -> local mapping for types within this module. 2070 GlobalTypeMap.insert(std::make_pair(getTotalNumTypes(), &F)); 2071 2072 // Introduce the local -> global mapping for types within this module. 2073 F.TypeRemap.insert(std::make_pair(LocalBaseTypeIndex, 2074 F.BaseTypeIndex - LocalBaseTypeIndex)); 2075 2076 TypesLoaded.resize(TypesLoaded.size() + F.LocalNumTypes); 2077 } 2078 break; 2079 } 2080 2081 case DECL_OFFSET: { 2082 if (F.LocalNumDecls != 0) { 2083 Error("duplicate DECL_OFFSET record in AST file"); 2084 return Failure; 2085 } 2086 F.DeclOffsets = (const uint32_t *)BlobStart; 2087 F.LocalNumDecls = Record[0]; 2088 unsigned LocalBaseDeclID = Record[1]; 2089 F.BaseDeclID = getTotalNumDecls(); 2090 2091 if (F.LocalNumDecls > 0) { 2092 // Introduce the global -> local mapping for declarations within this 2093 // module. 2094 GlobalDeclMap.insert(std::make_pair(getTotalNumDecls() + 1, &F)); 2095 2096 // Introduce the local -> global mapping for declarations within this 2097 // module. 2098 F.DeclRemap.insert(std::make_pair(LocalBaseDeclID, 2099 F.BaseDeclID - LocalBaseDeclID)); 2100 2101 DeclsLoaded.resize(DeclsLoaded.size() + F.LocalNumDecls); 2102 } 2103 break; 2104 } 2105 2106 case TU_UPDATE_LEXICAL: { 2107 DeclContextInfo Info = { 2108 &F, 2109 /* No visible information */ 0, 2110 reinterpret_cast<const KindDeclIDPair *>(BlobStart), 2111 static_cast<unsigned int>(BlobLen / sizeof(KindDeclIDPair)) 2112 }; 2113 DeclContextOffsets[Context ? Context->getTranslationUnitDecl() : 0] 2114 .push_back(Info); 2115 break; 2116 } 2117 2118 case UPDATE_VISIBLE: { 2119 unsigned Idx = 0; 2120 serialization::DeclID ID = ReadDeclID(F, Record, Idx); 2121 void *Table = ASTDeclContextNameLookupTable::Create( 2122 (const unsigned char *)BlobStart + Record[Idx++], 2123 (const unsigned char *)BlobStart, 2124 ASTDeclContextNameLookupTrait(*this, F)); 2125 // FIXME: Complete hack to check for the TU 2126 if (ID == (*(ModuleMgr.end() - 1))->BaseDeclID + 1 && Context) { // Is it the TU? 2127 DeclContextInfo Info = { 2128 &F, Table, /* No lexical information */ 0, 0 2129 }; 2130 DeclContextOffsets[Context->getTranslationUnitDecl()].push_back(Info); 2131 } else 2132 PendingVisibleUpdates[ID].push_back(std::make_pair(Table, &F)); 2133 break; 2134 } 2135 2136 case REDECLS_UPDATE_LATEST: { 2137 assert(Record.size() % 2 == 0 && "Expected pairs of DeclIDs"); 2138 for (unsigned i = 0, e = Record.size(); i < e; /* in loop */) { 2139 DeclID First = ReadDeclID(F, Record, i); 2140 DeclID Latest = ReadDeclID(F, Record, i); 2141 FirstLatestDeclIDs[First] = Latest; 2142 } 2143 break; 2144 } 2145 2146 case LANGUAGE_OPTIONS: 2147 if (ParseLanguageOptions(Record) && !DisableValidation) 2148 return IgnorePCH; 2149 break; 2150 2151 case IDENTIFIER_TABLE: 2152 F.IdentifierTableData = BlobStart; 2153 if (Record[0]) { 2154 F.IdentifierLookupTable 2155 = ASTIdentifierLookupTable::Create( 2156 (const unsigned char *)F.IdentifierTableData + Record[0], 2157 (const unsigned char *)F.IdentifierTableData, 2158 ASTIdentifierLookupTrait(*this, F)); 2159 if (PP) { 2160 PP->getIdentifierTable().setExternalIdentifierLookup(this); 2161 PP->getHeaderSearchInfo().SetExternalLookup(this); 2162 } 2163 } 2164 break; 2165 2166 case IDENTIFIER_OFFSET: { 2167 if (F.LocalNumIdentifiers != 0) { 2168 Error("duplicate IDENTIFIER_OFFSET record in AST file"); 2169 return Failure; 2170 } 2171 F.IdentifierOffsets = (const uint32_t *)BlobStart; 2172 F.LocalNumIdentifiers = Record[0]; 2173 unsigned LocalBaseIdentifierID = Record[1]; 2174 F.BaseIdentifierID = getTotalNumIdentifiers(); 2175 2176 if (F.LocalNumIdentifiers > 0) { 2177 // Introduce the global -> local mapping for identifiers within this 2178 // module. 2179 GlobalIdentifierMap.insert(std::make_pair(getTotalNumIdentifiers() + 1, 2180 &F)); 2181 2182 // Introduce the local -> global mapping for identifiers within this 2183 // module. 2184 F.IdentifierRemap.insert( 2185 std::make_pair(LocalBaseIdentifierID, 2186 F.BaseIdentifierID - LocalBaseIdentifierID)); 2187 2188 IdentifiersLoaded.resize(IdentifiersLoaded.size() 2189 + F.LocalNumIdentifiers); 2190 } 2191 break; 2192 } 2193 2194 case EXTERNAL_DEFINITIONS: 2195 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2196 ExternalDefinitions.push_back(getGlobalDeclID(F, Record[I])); 2197 break; 2198 2199 case SPECIAL_TYPES: 2200 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2201 SpecialTypes.push_back(getGlobalTypeID(F, Record[I])); 2202 break; 2203 2204 case STATISTICS: 2205 TotalNumStatements += Record[0]; 2206 TotalNumMacros += Record[1]; 2207 TotalLexicalDeclContexts += Record[2]; 2208 TotalVisibleDeclContexts += Record[3]; 2209 break; 2210 2211 case UNUSED_FILESCOPED_DECLS: 2212 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2213 UnusedFileScopedDecls.push_back(getGlobalDeclID(F, Record[I])); 2214 break; 2215 2216 case DELEGATING_CTORS: 2217 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2218 DelegatingCtorDecls.push_back(getGlobalDeclID(F, Record[I])); 2219 break; 2220 2221 case WEAK_UNDECLARED_IDENTIFIERS: 2222 if (Record.size() % 4 != 0) { 2223 Error("invalid weak identifiers record"); 2224 return Failure; 2225 } 2226 2227 // FIXME: Ignore weak undeclared identifiers from non-original PCH 2228 // files. This isn't the way to do it :) 2229 WeakUndeclaredIdentifiers.clear(); 2230 2231 // Translate the weak, undeclared identifiers into global IDs. 2232 for (unsigned I = 0, N = Record.size(); I < N; /* in loop */) { 2233 WeakUndeclaredIdentifiers.push_back( 2234 getGlobalIdentifierID(F, Record[I++])); 2235 WeakUndeclaredIdentifiers.push_back( 2236 getGlobalIdentifierID(F, Record[I++])); 2237 WeakUndeclaredIdentifiers.push_back( 2238 ReadSourceLocation(F, Record, I).getRawEncoding()); 2239 WeakUndeclaredIdentifiers.push_back(Record[I++]); 2240 } 2241 break; 2242 2243 case LOCALLY_SCOPED_EXTERNAL_DECLS: 2244 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2245 LocallyScopedExternalDecls.push_back(getGlobalDeclID(F, Record[I])); 2246 break; 2247 2248 case SELECTOR_OFFSETS: { 2249 F.SelectorOffsets = (const uint32_t *)BlobStart; 2250 F.LocalNumSelectors = Record[0]; 2251 unsigned LocalBaseSelectorID = Record[1]; 2252 F.BaseSelectorID = getTotalNumSelectors(); 2253 2254 if (F.LocalNumSelectors > 0) { 2255 // Introduce the global -> local mapping for selectors within this 2256 // module. 2257 GlobalSelectorMap.insert(std::make_pair(getTotalNumSelectors()+1, &F)); 2258 2259 // Introduce the local -> global mapping for selectors within this 2260 // module. 2261 F.SelectorRemap.insert(std::make_pair(LocalBaseSelectorID, 2262 F.BaseSelectorID - LocalBaseSelectorID)); 2263 2264 SelectorsLoaded.resize(SelectorsLoaded.size() + F.LocalNumSelectors); 2265 } 2266 break; 2267 } 2268 2269 case METHOD_POOL: 2270 F.SelectorLookupTableData = (const unsigned char *)BlobStart; 2271 if (Record[0]) 2272 F.SelectorLookupTable 2273 = ASTSelectorLookupTable::Create( 2274 F.SelectorLookupTableData + Record[0], 2275 F.SelectorLookupTableData, 2276 ASTSelectorLookupTrait(*this, F)); 2277 TotalNumMethodPoolEntries += Record[1]; 2278 break; 2279 2280 case REFERENCED_SELECTOR_POOL: 2281 if (!Record.empty()) { 2282 for (unsigned Idx = 0, N = Record.size() - 1; Idx < N; /* in loop */) { 2283 ReferencedSelectorsData.push_back(getGlobalSelectorID(F, 2284 Record[Idx++])); 2285 ReferencedSelectorsData.push_back(ReadSourceLocation(F, Record, Idx). 2286 getRawEncoding()); 2287 } 2288 } 2289 break; 2290 2291 case PP_COUNTER_VALUE: 2292 if (!Record.empty() && Listener) 2293 Listener->ReadCounter(Record[0]); 2294 break; 2295 2296 case SOURCE_LOCATION_OFFSETS: { 2297 F.SLocEntryOffsets = (const uint32_t *)BlobStart; 2298 F.LocalNumSLocEntries = Record[0]; 2299 llvm::tie(F.SLocEntryBaseID, F.SLocEntryBaseOffset) = 2300 SourceMgr.AllocateLoadedSLocEntries(F.LocalNumSLocEntries, Record[1]); 2301 // Make our entry in the range map. BaseID is negative and growing, so 2302 // we invert it. Because we invert it, though, we need the other end of 2303 // the range. 2304 unsigned RangeStart = 2305 unsigned(-F.SLocEntryBaseID) - F.LocalNumSLocEntries + 1; 2306 GlobalSLocEntryMap.insert(std::make_pair(RangeStart, &F)); 2307 F.FirstLoc = SourceLocation::getFromRawEncoding(F.SLocEntryBaseOffset); 2308 2309 // Initialize the remapping table. 2310 // Invalid stays invalid. 2311 F.SLocRemap.insert(std::make_pair(0U, 0)); 2312 // This module. Base was 2 when being compiled. 2313 F.SLocRemap.insert(std::make_pair(2U, 2314 static_cast<int>(F.SLocEntryBaseOffset - 2))); 2315 2316 TotalNumSLocEntries += F.LocalNumSLocEntries; 2317 break; 2318 } 2319 2320 case MODULE_OFFSET_MAP: { 2321 // Additional remapping information. 2322 const unsigned char *Data = (const unsigned char*)BlobStart; 2323 const unsigned char *DataEnd = Data + BlobLen; 2324 2325 // Continuous range maps we may be updating in our module. 2326 ContinuousRangeMap<uint32_t, int, 2>::Builder SLocRemap(F.SLocRemap); 2327 ContinuousRangeMap<uint32_t, int, 2>::Builder 2328 IdentifierRemap(F.IdentifierRemap); 2329 ContinuousRangeMap<uint32_t, int, 2>::Builder 2330 PreprocessedEntityRemap(F.PreprocessedEntityRemap); 2331 ContinuousRangeMap<uint32_t, int, 2>::Builder 2332 MacroDefinitionRemap(F.MacroDefinitionRemap); 2333 ContinuousRangeMap<uint32_t, int, 2>::Builder 2334 SelectorRemap(F.SelectorRemap); 2335 ContinuousRangeMap<uint32_t, int, 2>::Builder DeclRemap(F.DeclRemap); 2336 ContinuousRangeMap<uint32_t, int, 2>::Builder TypeRemap(F.TypeRemap); 2337 2338 while(Data < DataEnd) { 2339 uint16_t Len = io::ReadUnalignedLE16(Data); 2340 StringRef Name = StringRef((const char*)Data, Len); 2341 Data += Len; 2342 Module *OM = ModuleMgr.lookup(Name); 2343 if (!OM) { 2344 Error("SourceLocation remap refers to unknown module"); 2345 return Failure; 2346 } 2347 2348 uint32_t SLocOffset = io::ReadUnalignedLE32(Data); 2349 uint32_t IdentifierIDOffset = io::ReadUnalignedLE32(Data); 2350 uint32_t PreprocessedEntityIDOffset = io::ReadUnalignedLE32(Data); 2351 uint32_t MacroDefinitionIDOffset = io::ReadUnalignedLE32(Data); 2352 uint32_t SelectorIDOffset = io::ReadUnalignedLE32(Data); 2353 uint32_t DeclIDOffset = io::ReadUnalignedLE32(Data); 2354 uint32_t TypeIndexOffset = io::ReadUnalignedLE32(Data); 2355 2356 // Source location offset is mapped to OM->SLocEntryBaseOffset. 2357 SLocRemap.insert(std::make_pair(SLocOffset, 2358 static_cast<int>(OM->SLocEntryBaseOffset - SLocOffset))); 2359 IdentifierRemap.insert( 2360 std::make_pair(IdentifierIDOffset, 2361 OM->BaseIdentifierID - IdentifierIDOffset)); 2362 PreprocessedEntityRemap.insert( 2363 std::make_pair(PreprocessedEntityIDOffset, 2364 OM->BasePreprocessedEntityID - PreprocessedEntityIDOffset)); 2365 MacroDefinitionRemap.insert( 2366 std::make_pair(MacroDefinitionIDOffset, 2367 OM->BaseMacroDefinitionID - MacroDefinitionIDOffset)); 2368 SelectorRemap.insert(std::make_pair(SelectorIDOffset, 2369 OM->BaseSelectorID - SelectorIDOffset)); 2370 DeclRemap.insert(std::make_pair(DeclIDOffset, 2371 OM->BaseDeclID - DeclIDOffset)); 2372 2373 TypeRemap.insert(std::make_pair(TypeIndexOffset, 2374 OM->BaseTypeIndex - TypeIndexOffset)); 2375 } 2376 break; 2377 } 2378 2379 case SOURCE_MANAGER_LINE_TABLE: 2380 if (ParseLineTable(F, Record)) 2381 return Failure; 2382 break; 2383 2384 case FILE_SOURCE_LOCATION_OFFSETS: 2385 F.SLocFileOffsets = (const uint32_t *)BlobStart; 2386 F.LocalNumSLocFileEntries = Record[0]; 2387 break; 2388 2389 case SOURCE_LOCATION_PRELOADS: { 2390 // Need to transform from the local view (1-based IDs) to the global view, 2391 // which is based off F.SLocEntryBaseID. 2392 PreloadSLocEntries.reserve(PreloadSLocEntries.size() + Record.size()); 2393 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2394 PreloadSLocEntries.push_back(int(Record[I] - 1) + F.SLocEntryBaseID); 2395 break; 2396 } 2397 2398 case STAT_CACHE: { 2399 if (!DisableStatCache) { 2400 ASTStatCache *MyStatCache = 2401 new ASTStatCache((const unsigned char *)BlobStart + Record[0], 2402 (const unsigned char *)BlobStart, 2403 NumStatHits, NumStatMisses); 2404 FileMgr.addStatCache(MyStatCache); 2405 F.StatCache = MyStatCache; 2406 } 2407 break; 2408 } 2409 2410 case EXT_VECTOR_DECLS: 2411 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2412 ExtVectorDecls.push_back(getGlobalDeclID(F, Record[I])); 2413 break; 2414 2415 case VTABLE_USES: 2416 if (Record.size() % 3 != 0) { 2417 Error("Invalid VTABLE_USES record"); 2418 return Failure; 2419 } 2420 2421 // Later tables overwrite earlier ones. 2422 // FIXME: Modules will have some trouble with this. This is clearly not 2423 // the right way to do this. 2424 VTableUses.clear(); 2425 2426 for (unsigned Idx = 0, N = Record.size(); Idx != N; /* In loop */) { 2427 VTableUses.push_back(getGlobalDeclID(F, Record[Idx++])); 2428 VTableUses.push_back( 2429 ReadSourceLocation(F, Record, Idx).getRawEncoding()); 2430 VTableUses.push_back(Record[Idx++]); 2431 } 2432 break; 2433 2434 case DYNAMIC_CLASSES: 2435 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2436 DynamicClasses.push_back(getGlobalDeclID(F, Record[I])); 2437 break; 2438 2439 case PENDING_IMPLICIT_INSTANTIATIONS: 2440 if (PendingInstantiations.size() % 2 != 0) { 2441 Error("Invalid PENDING_IMPLICIT_INSTANTIATIONS block"); 2442 return Failure; 2443 } 2444 2445 // Later lists of pending instantiations overwrite earlier ones. 2446 // FIXME: This is most certainly wrong for modules. 2447 PendingInstantiations.clear(); 2448 for (unsigned I = 0, N = Record.size(); I != N; /* in loop */) { 2449 PendingInstantiations.push_back(getGlobalDeclID(F, Record[I++])); 2450 PendingInstantiations.push_back( 2451 ReadSourceLocation(F, Record, I).getRawEncoding()); 2452 } 2453 break; 2454 2455 case SEMA_DECL_REFS: 2456 // Later tables overwrite earlier ones. 2457 // FIXME: Modules will have some trouble with this. 2458 SemaDeclRefs.clear(); 2459 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2460 SemaDeclRefs.push_back(getGlobalDeclID(F, Record[I])); 2461 break; 2462 2463 case ORIGINAL_FILE_NAME: 2464 // The primary AST will be the last to get here, so it will be the one 2465 // that's used. 2466 ActualOriginalFileName.assign(BlobStart, BlobLen); 2467 OriginalFileName = ActualOriginalFileName; 2468 MaybeAddSystemRootToFilename(OriginalFileName); 2469 break; 2470 2471 case ORIGINAL_FILE_ID: 2472 OriginalFileID = FileID::get(Record[0]); 2473 break; 2474 2475 case ORIGINAL_PCH_DIR: 2476 // The primary AST will be the last to get here, so it will be the one 2477 // that's used. 2478 OriginalDir.assign(BlobStart, BlobLen); 2479 break; 2480 2481 case VERSION_CONTROL_BRANCH_REVISION: { 2482 const std::string &CurBranch = getClangFullRepositoryVersion(); 2483 StringRef ASTBranch(BlobStart, BlobLen); 2484 if (StringRef(CurBranch) != ASTBranch && !DisableValidation) { 2485 Diag(diag::warn_pch_different_branch) << ASTBranch << CurBranch; 2486 return IgnorePCH; 2487 } 2488 break; 2489 } 2490 2491 case MACRO_DEFINITION_OFFSETS: { 2492 F.MacroDefinitionOffsets = (const uint32_t *)BlobStart; 2493 F.NumPreallocatedPreprocessingEntities = Record[0]; 2494 unsigned LocalBasePreprocessedEntityID = Record[1]; 2495 F.LocalNumMacroDefinitions = Record[2]; 2496 unsigned LocalBaseMacroID = Record[3]; 2497 2498 unsigned StartingID; 2499 if (PP) { 2500 if (!PP->getPreprocessingRecord()) 2501 PP->createPreprocessingRecord(true); 2502 if (!PP->getPreprocessingRecord()->getExternalSource()) 2503 PP->getPreprocessingRecord()->SetExternalSource(*this); 2504 StartingID 2505 = PP->getPreprocessingRecord() 2506 ->allocateLoadedEntities(F.NumPreallocatedPreprocessingEntities); 2507 } else { 2508 // FIXME: We'll eventually want to kill this path, since it assumes 2509 // a particular allocation strategy in the preprocessing record. 2510 StartingID = getTotalNumPreprocessedEntities() 2511 - F.NumPreallocatedPreprocessingEntities; 2512 } 2513 F.BaseMacroDefinitionID = getTotalNumMacroDefinitions(); 2514 F.BasePreprocessedEntityID = StartingID; 2515 2516 if (F.NumPreallocatedPreprocessingEntities > 0) { 2517 // Introduce the global -> local mapping for preprocessed entities in 2518 // this module. 2519 GlobalPreprocessedEntityMap.insert(std::make_pair(StartingID, &F)); 2520 2521 // Introduce the local -> global mapping for preprocessed entities in 2522 // this module. 2523 F.PreprocessedEntityRemap.insert( 2524 std::make_pair(LocalBasePreprocessedEntityID, 2525 F.BasePreprocessedEntityID - LocalBasePreprocessedEntityID)); 2526 } 2527 2528 2529 if (F.LocalNumMacroDefinitions > 0) { 2530 // Introduce the global -> local mapping for macro definitions within 2531 // this module. 2532 GlobalMacroDefinitionMap.insert( 2533 std::make_pair(getTotalNumMacroDefinitions() + 1, &F)); 2534 2535 // Introduce the local -> global mapping for macro definitions within 2536 // this module. 2537 F.MacroDefinitionRemap.insert( 2538 std::make_pair(LocalBaseMacroID, 2539 F.BaseMacroDefinitionID - LocalBaseMacroID)); 2540 2541 MacroDefinitionsLoaded.resize( 2542 MacroDefinitionsLoaded.size() + F.LocalNumMacroDefinitions); 2543 } 2544 2545 break; 2546 } 2547 2548 case DECL_UPDATE_OFFSETS: { 2549 if (Record.size() % 2 != 0) { 2550 Error("invalid DECL_UPDATE_OFFSETS block in AST file"); 2551 return Failure; 2552 } 2553 for (unsigned I = 0, N = Record.size(); I != N; I += 2) 2554 DeclUpdateOffsets[getGlobalDeclID(F, Record[I])] 2555 .push_back(std::make_pair(&F, Record[I+1])); 2556 break; 2557 } 2558 2559 case DECL_REPLACEMENTS: { 2560 if (Record.size() % 2 != 0) { 2561 Error("invalid DECL_REPLACEMENTS block in AST file"); 2562 return Failure; 2563 } 2564 for (unsigned I = 0, N = Record.size(); I != N; I += 2) 2565 ReplacedDecls[getGlobalDeclID(F, Record[I])] 2566 = std::make_pair(&F, Record[I+1]); 2567 break; 2568 } 2569 2570 case CXX_BASE_SPECIFIER_OFFSETS: { 2571 if (F.LocalNumCXXBaseSpecifiers != 0) { 2572 Error("duplicate CXX_BASE_SPECIFIER_OFFSETS record in AST file"); 2573 return Failure; 2574 } 2575 2576 F.LocalNumCXXBaseSpecifiers = Record[0]; 2577 F.CXXBaseSpecifiersOffsets = (const uint32_t *)BlobStart; 2578 NumCXXBaseSpecifiersLoaded += F.LocalNumCXXBaseSpecifiers; 2579 break; 2580 } 2581 2582 case DIAG_PRAGMA_MAPPINGS: 2583 if (Record.size() % 2 != 0) { 2584 Error("invalid DIAG_USER_MAPPINGS block in AST file"); 2585 return Failure; 2586 } 2587 2588 if (F.PragmaDiagMappings.empty()) 2589 F.PragmaDiagMappings.swap(Record); 2590 else 2591 F.PragmaDiagMappings.insert(F.PragmaDiagMappings.end(), 2592 Record.begin(), Record.end()); 2593 break; 2594 2595 case CUDA_SPECIAL_DECL_REFS: 2596 // Later tables overwrite earlier ones. 2597 // FIXME: Modules will have trouble with this. 2598 CUDASpecialDeclRefs.clear(); 2599 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2600 CUDASpecialDeclRefs.push_back(getGlobalDeclID(F, Record[I])); 2601 break; 2602 2603 case HEADER_SEARCH_TABLE: { 2604 F.HeaderFileInfoTableData = BlobStart; 2605 F.LocalNumHeaderFileInfos = Record[1]; 2606 F.HeaderFileFrameworkStrings = BlobStart + Record[2]; 2607 if (Record[0]) { 2608 F.HeaderFileInfoTable 2609 = HeaderFileInfoLookupTable::Create( 2610 (const unsigned char *)F.HeaderFileInfoTableData + Record[0], 2611 (const unsigned char *)F.HeaderFileInfoTableData, 2612 HeaderFileInfoTrait(*this, F, 2613 PP? &PP->getHeaderSearchInfo() : 0, 2614 BlobStart + Record[2])); 2615 if (PP) 2616 PP->getHeaderSearchInfo().SetExternalSource(this); 2617 } 2618 break; 2619 } 2620 2621 case FP_PRAGMA_OPTIONS: 2622 // Later tables overwrite earlier ones. 2623 FPPragmaOptions.swap(Record); 2624 break; 2625 2626 case OPENCL_EXTENSIONS: 2627 // Later tables overwrite earlier ones. 2628 OpenCLExtensions.swap(Record); 2629 break; 2630 2631 case TENTATIVE_DEFINITIONS: 2632 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2633 TentativeDefinitions.push_back(getGlobalDeclID(F, Record[I])); 2634 break; 2635 2636 case KNOWN_NAMESPACES: 2637 for (unsigned I = 0, N = Record.size(); I != N; ++I) 2638 KnownNamespaces.push_back(getGlobalDeclID(F, Record[I])); 2639 break; 2640 } 2641 First = false; 2642 } 2643 Error("premature end of bitstream in AST file"); 2644 return Failure; 2645} 2646 2647ASTReader::ASTReadResult ASTReader::validateFileEntries() { 2648 for (ModuleIterator I = ModuleMgr.begin(), 2649 E = ModuleMgr.end(); I != E; ++I) { 2650 Module *F = *I; 2651 llvm::BitstreamCursor &SLocEntryCursor = F->SLocEntryCursor; 2652 2653 for (unsigned i = 0, e = F->LocalNumSLocFileEntries; i != e; ++i) { 2654 SLocEntryCursor.JumpToBit(F->SLocFileOffsets[i]); 2655 unsigned Code = SLocEntryCursor.ReadCode(); 2656 if (Code == llvm::bitc::END_BLOCK || 2657 Code == llvm::bitc::ENTER_SUBBLOCK || 2658 Code == llvm::bitc::DEFINE_ABBREV) { 2659 Error("incorrectly-formatted source location entry in AST file"); 2660 return Failure; 2661 } 2662 2663 RecordData Record; 2664 const char *BlobStart; 2665 unsigned BlobLen; 2666 switch (SLocEntryCursor.ReadRecord(Code, Record, &BlobStart, &BlobLen)) { 2667 default: 2668 Error("incorrectly-formatted source location entry in AST file"); 2669 return Failure; 2670 2671 case SM_SLOC_FILE_ENTRY: { 2672 StringRef Filename(BlobStart, BlobLen); 2673 const FileEntry *File = getFileEntry(Filename); 2674 2675 if (File == 0) { 2676 std::string ErrorStr = "could not find file '"; 2677 ErrorStr += Filename; 2678 ErrorStr += "' referenced by AST file"; 2679 Error(ErrorStr.c_str()); 2680 return IgnorePCH; 2681 } 2682 2683 if (Record.size() < 6) { 2684 Error("source location entry is incorrect"); 2685 return Failure; 2686 } 2687 2688 // The stat info from the FileEntry came from the cached stat 2689 // info of the PCH, so we cannot trust it. 2690 struct stat StatBuf; 2691 if (::stat(File->getName(), &StatBuf) != 0) { 2692 StatBuf.st_size = File->getSize(); 2693 StatBuf.st_mtime = File->getModificationTime(); 2694 } 2695 2696 if (((off_t)Record[4] != StatBuf.st_size 2697#if !defined(LLVM_ON_WIN32) 2698 // In our regression testing, the Windows file system seems to 2699 // have inconsistent modification times that sometimes 2700 // erroneously trigger this error-handling path. 2701 || (time_t)Record[5] != StatBuf.st_mtime 2702#endif 2703 )) { 2704 Error(diag::err_fe_pch_file_modified, Filename); 2705 return IgnorePCH; 2706 } 2707 2708 break; 2709 } 2710 } 2711 } 2712 } 2713 2714 return Success; 2715} 2716 2717ASTReader::ASTReadResult ASTReader::ReadAST(const std::string &FileName, 2718 ModuleKind Type) { 2719 switch(ReadASTCore(FileName, Type)) { 2720 case Failure: return Failure; 2721 case IgnorePCH: return IgnorePCH; 2722 case Success: break; 2723 } 2724 2725 // Here comes stuff that we only do once the entire chain is loaded. 2726 2727 if (!DisableValidation) { 2728 switch(validateFileEntries()) { 2729 case Failure: return Failure; 2730 case IgnorePCH: return IgnorePCH; 2731 case Success: break; 2732 } 2733 } 2734 2735 // Preload SLocEntries. 2736 for (unsigned I = 0, N = PreloadSLocEntries.size(); I != N; ++I) { 2737 ASTReadResult Result = ReadSLocEntryRecord(PreloadSLocEntries[I]); 2738 if (Result != Success) 2739 return Failure; 2740 } 2741 PreloadSLocEntries.clear(); 2742 2743 // Check the predefines buffers. 2744 if (!DisableValidation && Type != MK_Module && CheckPredefinesBuffers()) 2745 return IgnorePCH; 2746 2747 if (PP) { 2748 // Initialization of keywords and pragmas occurs before the 2749 // AST file is read, so there may be some identifiers that were 2750 // loaded into the IdentifierTable before we intercepted the 2751 // creation of identifiers. Iterate through the list of known 2752 // identifiers and determine whether we have to establish 2753 // preprocessor definitions or top-level identifier declaration 2754 // chains for those identifiers. 2755 // 2756 // We copy the IdentifierInfo pointers to a small vector first, 2757 // since de-serializing declarations or macro definitions can add 2758 // new entries into the identifier table, invalidating the 2759 // iterators. 2760 // 2761 // FIXME: We need a lazier way to load this information, e.g., by marking 2762 // the identifier data as 'dirty', so that it will be looked up in the 2763 // AST file(s) if it is uttered in the source. This could save us some 2764 // module load time. 2765 SmallVector<IdentifierInfo *, 128> Identifiers; 2766 for (IdentifierTable::iterator Id = PP->getIdentifierTable().begin(), 2767 IdEnd = PP->getIdentifierTable().end(); 2768 Id != IdEnd; ++Id) 2769 Identifiers.push_back(Id->second); 2770 // We need to search the tables in all files. 2771 for (ModuleIterator J = ModuleMgr.begin(), 2772 M = ModuleMgr.end(); J != M; ++J) { 2773 ASTIdentifierLookupTable *IdTable 2774 = (ASTIdentifierLookupTable *)(*J)->IdentifierLookupTable; 2775 // Not all AST files necessarily have identifier tables, only the useful 2776 // ones. 2777 if (!IdTable) 2778 continue; 2779 for (unsigned I = 0, N = Identifiers.size(); I != N; ++I) { 2780 IdentifierInfo *II = Identifiers[I]; 2781 // Look in the on-disk hash tables for an entry for this identifier 2782 ASTIdentifierLookupTrait Info(*this, *(*J), II); 2783 std::pair<const char*,unsigned> Key(II->getNameStart(),II->getLength()); 2784 ASTIdentifierLookupTable::iterator Pos = IdTable->find(Key, &Info); 2785 if (Pos == IdTable->end()) 2786 continue; 2787 2788 // Dereferencing the iterator has the effect of populating the 2789 // IdentifierInfo node with the various declarations it needs. 2790 (void)*Pos; 2791 } 2792 } 2793 } 2794 2795 if (Context) 2796 InitializeContext(*Context); 2797 2798 if (DeserializationListener) 2799 DeserializationListener->ReaderInitialized(this); 2800 2801 // If this AST file is a precompiled preamble, then set the main file ID of 2802 // the source manager to the file source file from which the preamble was 2803 // built. This is the only valid way to use a precompiled preamble. 2804 if (Type == MK_Preamble) { 2805 if (OriginalFileID.isInvalid()) { 2806 SourceLocation Loc 2807 = SourceMgr.getLocation(FileMgr.getFile(getOriginalSourceFile()), 1, 1); 2808 if (Loc.isValid()) 2809 OriginalFileID = SourceMgr.getDecomposedLoc(Loc).first; 2810 } 2811 else { 2812 OriginalFileID = FileID::get(ModuleMgr.getPrimaryModule().SLocEntryBaseID 2813 + OriginalFileID.getOpaqueValue() - 1); 2814 } 2815 2816 if (!OriginalFileID.isInvalid()) 2817 SourceMgr.SetPreambleFileID(OriginalFileID); 2818 } 2819 2820 return Success; 2821} 2822 2823ASTReader::ASTReadResult ASTReader::ReadASTCore(StringRef FileName, 2824 ModuleKind Type) { 2825 Module &F = ModuleMgr.addModule(FileName, Type); 2826 2827 if (FileName != "-") { 2828 CurrentDir = llvm::sys::path::parent_path(FileName); 2829 if (CurrentDir.empty()) CurrentDir = "."; 2830 } 2831 2832 if (llvm::MemoryBuffer *Buffer = ModuleMgr.lookupBuffer(FileName)) { 2833 F.Buffer.reset(Buffer); 2834 assert(F.Buffer && "Passed null buffer"); 2835 } else { 2836 // Open the AST file. 2837 // 2838 // FIXME: This shouldn't be here, we should just take a raw_ostream. 2839 std::string ErrStr; 2840 llvm::error_code ec; 2841 if (FileName == "-") { 2842 ec = llvm::MemoryBuffer::getSTDIN(F.Buffer); 2843 if (ec) 2844 ErrStr = ec.message(); 2845 } else 2846 F.Buffer.reset(FileMgr.getBufferForFile(FileName, &ErrStr)); 2847 if (!F.Buffer) { 2848 Error(ErrStr.c_str()); 2849 return IgnorePCH; 2850 } 2851 } 2852 2853 // Initialize the stream 2854 F.StreamFile.init((const unsigned char *)F.Buffer->getBufferStart(), 2855 (const unsigned char *)F.Buffer->getBufferEnd()); 2856 llvm::BitstreamCursor &Stream = F.Stream; 2857 Stream.init(F.StreamFile); 2858 F.SizeInBits = F.Buffer->getBufferSize() * 8; 2859 2860 // Sniff for the signature. 2861 if (Stream.Read(8) != 'C' || 2862 Stream.Read(8) != 'P' || 2863 Stream.Read(8) != 'C' || 2864 Stream.Read(8) != 'H') { 2865 Diag(diag::err_not_a_pch_file) << FileName; 2866 return Failure; 2867 } 2868 2869 while (!Stream.AtEndOfStream()) { 2870 unsigned Code = Stream.ReadCode(); 2871 2872 if (Code != llvm::bitc::ENTER_SUBBLOCK) { 2873 Error("invalid record at top-level of AST file"); 2874 return Failure; 2875 } 2876 2877 unsigned BlockID = Stream.ReadSubBlockID(); 2878 2879 // We only know the AST subblock ID. 2880 switch (BlockID) { 2881 case llvm::bitc::BLOCKINFO_BLOCK_ID: 2882 if (Stream.ReadBlockInfoBlock()) { 2883 Error("malformed BlockInfoBlock in AST file"); 2884 return Failure; 2885 } 2886 break; 2887 case AST_BLOCK_ID: 2888 switch (ReadASTBlock(F)) { 2889 case Success: 2890 break; 2891 2892 case Failure: 2893 return Failure; 2894 2895 case IgnorePCH: 2896 // FIXME: We could consider reading through to the end of this 2897 // AST block, skipping subblocks, to see if there are other 2898 // AST blocks elsewhere. 2899 2900 // FIXME: We can't clear loaded slocentries anymore. 2901 //SourceMgr.ClearPreallocatedSLocEntries(); 2902 2903 // Remove the stat cache. 2904 if (F.StatCache) 2905 FileMgr.removeStatCache((ASTStatCache*)F.StatCache); 2906 2907 return IgnorePCH; 2908 } 2909 break; 2910 default: 2911 if (Stream.SkipBlock()) { 2912 Error("malformed block record in AST file"); 2913 return Failure; 2914 } 2915 break; 2916 } 2917 } 2918 2919 // Once read, set the Module bit base offset and update the size in 2920 // bits of all files we've seen. 2921 F.GlobalBitOffset = TotalModulesSizeInBits; 2922 TotalModulesSizeInBits += F.SizeInBits; 2923 GlobalBitOffsetsMap.insert(std::make_pair(F.GlobalBitOffset, &F)); 2924 return Success; 2925} 2926 2927void ASTReader::setPreprocessor(Preprocessor &pp) { 2928 PP = &pp; 2929 2930 if (unsigned N = getTotalNumPreprocessedEntities()) { 2931 if (!PP->getPreprocessingRecord()) 2932 PP->createPreprocessingRecord(true); 2933 PP->getPreprocessingRecord()->SetExternalSource(*this); 2934 PP->getPreprocessingRecord()->allocateLoadedEntities(N); 2935 } 2936 2937 PP->getHeaderSearchInfo().SetExternalLookup(this); 2938 PP->getHeaderSearchInfo().SetExternalSource(this); 2939} 2940 2941void ASTReader::InitializeContext(ASTContext &Ctx) { 2942 Context = &Ctx; 2943 assert(Context && "Passed null context!"); 2944 2945 assert(PP && "Forgot to set Preprocessor ?"); 2946 PP->getIdentifierTable().setExternalIdentifierLookup(this); 2947 PP->setExternalSource(this); 2948 2949 // If we have an update block for the TU waiting, we have to add it before 2950 // deserializing the decl. 2951 DeclContextOffsetsMap::iterator DCU = DeclContextOffsets.find(0); 2952 if (DCU != DeclContextOffsets.end()) { 2953 // Insertion could invalidate map, so grab vector. 2954 DeclContextInfos T; 2955 T.swap(DCU->second); 2956 DeclContextOffsets.erase(DCU); 2957 DeclContextOffsets[Ctx.getTranslationUnitDecl()].swap(T); 2958 } 2959 2960 // Load the translation unit declaration 2961 GetTranslationUnitDecl(); 2962 2963 // FIXME: Find a better way to deal with built-in types 2964 if (Context->getBuiltinVaListType().isNull()) { 2965 // Load the special types. 2966 Context->setBuiltinVaListType( 2967 GetType(SpecialTypes[SPECIAL_TYPE_BUILTIN_VA_LIST])); 2968 if (unsigned Id = SpecialTypes[SPECIAL_TYPE_OBJC_ID]) 2969 Context->setObjCIdType(GetType(Id)); 2970 if (unsigned Sel = SpecialTypes[SPECIAL_TYPE_OBJC_SELECTOR]) 2971 Context->setObjCSelType(GetType(Sel)); 2972 if (unsigned Proto = SpecialTypes[SPECIAL_TYPE_OBJC_PROTOCOL]) 2973 Context->setObjCProtoType(GetType(Proto)); 2974 if (unsigned Class = SpecialTypes[SPECIAL_TYPE_OBJC_CLASS]) 2975 Context->setObjCClassType(GetType(Class)); 2976 2977 if (unsigned String = SpecialTypes[SPECIAL_TYPE_CF_CONSTANT_STRING]) 2978 Context->setCFConstantStringType(GetType(String)); 2979 if (unsigned File = SpecialTypes[SPECIAL_TYPE_FILE]) { 2980 QualType FileType = GetType(File); 2981 if (FileType.isNull()) { 2982 Error("FILE type is NULL"); 2983 return; 2984 } 2985 if (const TypedefType *Typedef = FileType->getAs<TypedefType>()) 2986 Context->setFILEDecl(Typedef->getDecl()); 2987 else { 2988 const TagType *Tag = FileType->getAs<TagType>(); 2989 if (!Tag) { 2990 Error("Invalid FILE type in AST file"); 2991 return; 2992 } 2993 Context->setFILEDecl(Tag->getDecl()); 2994 } 2995 } 2996 if (unsigned Jmp_buf = SpecialTypes[SPECIAL_TYPE_jmp_buf]) { 2997 QualType Jmp_bufType = GetType(Jmp_buf); 2998 if (Jmp_bufType.isNull()) { 2999 Error("jmp_buf type is NULL"); 3000 return; 3001 } 3002 if (const TypedefType *Typedef = Jmp_bufType->getAs<TypedefType>()) 3003 Context->setjmp_bufDecl(Typedef->getDecl()); 3004 else { 3005 const TagType *Tag = Jmp_bufType->getAs<TagType>(); 3006 if (!Tag) { 3007 Error("Invalid jmp_buf type in AST file"); 3008 return; 3009 } 3010 Context->setjmp_bufDecl(Tag->getDecl()); 3011 } 3012 } 3013 if (unsigned Sigjmp_buf = SpecialTypes[SPECIAL_TYPE_sigjmp_buf]) { 3014 QualType Sigjmp_bufType = GetType(Sigjmp_buf); 3015 if (Sigjmp_bufType.isNull()) { 3016 Error("sigjmp_buf type is NULL"); 3017 return; 3018 } 3019 if (const TypedefType *Typedef = Sigjmp_bufType->getAs<TypedefType>()) 3020 Context->setsigjmp_bufDecl(Typedef->getDecl()); 3021 else { 3022 const TagType *Tag = Sigjmp_bufType->getAs<TagType>(); 3023 assert(Tag && "Invalid sigjmp_buf type in AST file"); 3024 Context->setsigjmp_bufDecl(Tag->getDecl()); 3025 } 3026 } 3027 if (unsigned ObjCIdRedef 3028 = SpecialTypes[SPECIAL_TYPE_OBJC_ID_REDEFINITION]) 3029 Context->ObjCIdRedefinitionType = GetType(ObjCIdRedef); 3030 if (unsigned ObjCClassRedef 3031 = SpecialTypes[SPECIAL_TYPE_OBJC_CLASS_REDEFINITION]) 3032 Context->ObjCClassRedefinitionType = GetType(ObjCClassRedef); 3033 if (unsigned ObjCSelRedef 3034 = SpecialTypes[SPECIAL_TYPE_OBJC_SEL_REDEFINITION]) 3035 Context->ObjCSelRedefinitionType = GetType(ObjCSelRedef); 3036 3037 if (SpecialTypes[SPECIAL_TYPE_INT128_INSTALLED]) 3038 Context->setInt128Installed(); 3039 } 3040 3041 ReadPragmaDiagnosticMappings(Context->getDiagnostics()); 3042 3043 // If there were any CUDA special declarations, deserialize them. 3044 if (!CUDASpecialDeclRefs.empty()) { 3045 assert(CUDASpecialDeclRefs.size() == 1 && "More decl refs than expected!"); 3046 Context->setcudaConfigureCallDecl( 3047 cast<FunctionDecl>(GetDecl(CUDASpecialDeclRefs[0]))); 3048 } 3049} 3050 3051/// \brief Retrieve the name of the original source file name 3052/// directly from the AST file, without actually loading the AST 3053/// file. 3054std::string ASTReader::getOriginalSourceFile(const std::string &ASTFileName, 3055 FileManager &FileMgr, 3056 Diagnostic &Diags) { 3057 // Open the AST file. 3058 std::string ErrStr; 3059 llvm::OwningPtr<llvm::MemoryBuffer> Buffer; 3060 Buffer.reset(FileMgr.getBufferForFile(ASTFileName, &ErrStr)); 3061 if (!Buffer) { 3062 Diags.Report(diag::err_fe_unable_to_read_pch_file) << ErrStr; 3063 return std::string(); 3064 } 3065 3066 // Initialize the stream 3067 llvm::BitstreamReader StreamFile; 3068 llvm::BitstreamCursor Stream; 3069 StreamFile.init((const unsigned char *)Buffer->getBufferStart(), 3070 (const unsigned char *)Buffer->getBufferEnd()); 3071 Stream.init(StreamFile); 3072 3073 // Sniff for the signature. 3074 if (Stream.Read(8) != 'C' || 3075 Stream.Read(8) != 'P' || 3076 Stream.Read(8) != 'C' || 3077 Stream.Read(8) != 'H') { 3078 Diags.Report(diag::err_fe_not_a_pch_file) << ASTFileName; 3079 return std::string(); 3080 } 3081 3082 RecordData Record; 3083 while (!Stream.AtEndOfStream()) { 3084 unsigned Code = Stream.ReadCode(); 3085 3086 if (Code == llvm::bitc::ENTER_SUBBLOCK) { 3087 unsigned BlockID = Stream.ReadSubBlockID(); 3088 3089 // We only know the AST subblock ID. 3090 switch (BlockID) { 3091 case AST_BLOCK_ID: 3092 if (Stream.EnterSubBlock(AST_BLOCK_ID)) { 3093 Diags.Report(diag::err_fe_pch_malformed_block) << ASTFileName; 3094 return std::string(); 3095 } 3096 break; 3097 3098 default: 3099 if (Stream.SkipBlock()) { 3100 Diags.Report(diag::err_fe_pch_malformed_block) << ASTFileName; 3101 return std::string(); 3102 } 3103 break; 3104 } 3105 continue; 3106 } 3107 3108 if (Code == llvm::bitc::END_BLOCK) { 3109 if (Stream.ReadBlockEnd()) { 3110 Diags.Report(diag::err_fe_pch_error_at_end_block) << ASTFileName; 3111 return std::string(); 3112 } 3113 continue; 3114 } 3115 3116 if (Code == llvm::bitc::DEFINE_ABBREV) { 3117 Stream.ReadAbbrevRecord(); 3118 continue; 3119 } 3120 3121 Record.clear(); 3122 const char *BlobStart = 0; 3123 unsigned BlobLen = 0; 3124 if (Stream.ReadRecord(Code, Record, &BlobStart, &BlobLen) 3125 == ORIGINAL_FILE_NAME) 3126 return std::string(BlobStart, BlobLen); 3127 } 3128 3129 return std::string(); 3130} 3131 3132/// \brief Parse the record that corresponds to a LangOptions data 3133/// structure. 3134/// 3135/// This routine parses the language options from the AST file and then gives 3136/// them to the AST listener if one is set. 3137/// 3138/// \returns true if the listener deems the file unacceptable, false otherwise. 3139bool ASTReader::ParseLanguageOptions( 3140 const SmallVectorImpl<uint64_t> &Record) { 3141 if (Listener) { 3142 LangOptions LangOpts; 3143 3144 #define PARSE_LANGOPT(Option) \ 3145 LangOpts.Option = Record[Idx]; \ 3146 ++Idx 3147 3148 unsigned Idx = 0; 3149 PARSE_LANGOPT(Trigraphs); 3150 PARSE_LANGOPT(BCPLComment); 3151 PARSE_LANGOPT(DollarIdents); 3152 PARSE_LANGOPT(AsmPreprocessor); 3153 PARSE_LANGOPT(GNUMode); 3154 PARSE_LANGOPT(GNUKeywords); 3155 PARSE_LANGOPT(ImplicitInt); 3156 PARSE_LANGOPT(Digraphs); 3157 PARSE_LANGOPT(HexFloats); 3158 PARSE_LANGOPT(C99); 3159 PARSE_LANGOPT(C1X); 3160 PARSE_LANGOPT(Microsoft); 3161 PARSE_LANGOPT(CPlusPlus); 3162 PARSE_LANGOPT(CPlusPlus0x); 3163 PARSE_LANGOPT(CXXOperatorNames); 3164 PARSE_LANGOPT(ObjC1); 3165 PARSE_LANGOPT(ObjC2); 3166 PARSE_LANGOPT(ObjCNonFragileABI); 3167 PARSE_LANGOPT(ObjCNonFragileABI2); 3168 PARSE_LANGOPT(AppleKext); 3169 PARSE_LANGOPT(ObjCDefaultSynthProperties); 3170 PARSE_LANGOPT(ObjCInferRelatedResultType); 3171 PARSE_LANGOPT(NoConstantCFStrings); 3172 PARSE_LANGOPT(PascalStrings); 3173 PARSE_LANGOPT(WritableStrings); 3174 PARSE_LANGOPT(LaxVectorConversions); 3175 PARSE_LANGOPT(AltiVec); 3176 PARSE_LANGOPT(Exceptions); 3177 PARSE_LANGOPT(ObjCExceptions); 3178 PARSE_LANGOPT(CXXExceptions); 3179 PARSE_LANGOPT(SjLjExceptions); 3180 PARSE_LANGOPT(MSBitfields); 3181 PARSE_LANGOPT(NeXTRuntime); 3182 PARSE_LANGOPT(Freestanding); 3183 PARSE_LANGOPT(NoBuiltin); 3184 PARSE_LANGOPT(ThreadsafeStatics); 3185 PARSE_LANGOPT(POSIXThreads); 3186 PARSE_LANGOPT(Blocks); 3187 PARSE_LANGOPT(EmitAllDecls); 3188 PARSE_LANGOPT(MathErrno); 3189 LangOpts.setSignedOverflowBehavior((LangOptions::SignedOverflowBehaviorTy) 3190 Record[Idx++]); 3191 PARSE_LANGOPT(HeinousExtensions); 3192 PARSE_LANGOPT(Optimize); 3193 PARSE_LANGOPT(OptimizeSize); 3194 PARSE_LANGOPT(Static); 3195 PARSE_LANGOPT(PICLevel); 3196 PARSE_LANGOPT(GNUInline); 3197 PARSE_LANGOPT(NoInline); 3198 PARSE_LANGOPT(Deprecated); 3199 PARSE_LANGOPT(AccessControl); 3200 PARSE_LANGOPT(CharIsSigned); 3201 PARSE_LANGOPT(ShortWChar); 3202 PARSE_LANGOPT(ShortEnums); 3203 LangOpts.setGCMode((LangOptions::GCMode)Record[Idx++]); 3204 LangOpts.setVisibilityMode((Visibility)Record[Idx++]); 3205 LangOpts.setStackProtectorMode((LangOptions::StackProtectorMode) 3206 Record[Idx++]); 3207 PARSE_LANGOPT(InstantiationDepth); 3208 PARSE_LANGOPT(OpenCL); 3209 PARSE_LANGOPT(CUDA); 3210 PARSE_LANGOPT(CatchUndefined); 3211 PARSE_LANGOPT(DefaultFPContract); 3212 PARSE_LANGOPT(ElideConstructors); 3213 PARSE_LANGOPT(SpellChecking); 3214 PARSE_LANGOPT(MRTD); 3215 PARSE_LANGOPT(ObjCAutoRefCount); 3216 PARSE_LANGOPT(ObjCInferRelatedReturnType); 3217 #undef PARSE_LANGOPT 3218 3219 return Listener->ReadLanguageOptions(LangOpts); 3220 } 3221 3222 return false; 3223} 3224 3225void ASTReader::ReadPreprocessedEntities() { 3226 for (ModuleIterator I = ModuleMgr.begin(), E = ModuleMgr.end(); I != E; ++I) { 3227 Module &F = *(*I); 3228 if (!F.PreprocessorDetailCursor.getBitStreamReader()) 3229 continue; 3230 3231 SavedStreamPosition SavedPosition(F.PreprocessorDetailCursor); 3232 F.PreprocessorDetailCursor.JumpToBit(F.PreprocessorDetailStartOffset); 3233 while (LoadPreprocessedEntity(F)) { } 3234 } 3235} 3236 3237PreprocessedEntity *ASTReader::ReadPreprocessedEntityAtOffset(uint64_t Offset) { 3238 RecordLocation Loc = getLocalBitOffset(Offset); 3239 3240 // Keep track of where we are in the stream, then jump back there 3241 // after reading this entity. 3242 SavedStreamPosition SavedPosition(Loc.F->PreprocessorDetailCursor); 3243 Loc.F->PreprocessorDetailCursor.JumpToBit(Loc.Offset); 3244 return LoadPreprocessedEntity(*Loc.F); 3245} 3246 3247HeaderFileInfo ASTReader::GetHeaderFileInfo(const FileEntry *FE) { 3248 for (ModuleIterator I = ModuleMgr.begin(), E = ModuleMgr.end(); I != E; ++I) { 3249 Module &F = *(*I); 3250 3251 HeaderFileInfoTrait Trait(*this, F, &PP->getHeaderSearchInfo(), 3252 F.HeaderFileFrameworkStrings, 3253 FE->getName()); 3254 3255 HeaderFileInfoLookupTable *Table 3256 = static_cast<HeaderFileInfoLookupTable *>(F.HeaderFileInfoTable); 3257 if (!Table) 3258 continue; 3259 3260 // Look in the on-disk hash table for an entry for this file name. 3261 HeaderFileInfoLookupTable::iterator Pos = Table->find(FE->getName(), 3262 &Trait); 3263 if (Pos == Table->end()) 3264 continue; 3265 3266 HeaderFileInfo HFI = *Pos; 3267 if (Listener) 3268 Listener->ReadHeaderFileInfo(HFI, FE->getUID()); 3269 3270 return HFI; 3271 } 3272 3273 return HeaderFileInfo(); 3274} 3275 3276void ASTReader::ReadPragmaDiagnosticMappings(Diagnostic &Diag) { 3277 for (ModuleIterator I = ModuleMgr.begin(), E = ModuleMgr.end(); I != E; ++I) { 3278 Module &F = *(*I); 3279 unsigned Idx = 0; 3280 while (Idx < F.PragmaDiagMappings.size()) { 3281 SourceLocation Loc = ReadSourceLocation(F, F.PragmaDiagMappings[Idx++]); 3282 while (1) { 3283 assert(Idx < F.PragmaDiagMappings.size() && 3284 "Invalid data, didn't find '-1' marking end of diag/map pairs"); 3285 if (Idx >= F.PragmaDiagMappings.size()) { 3286 break; // Something is messed up but at least avoid infinite loop in 3287 // release build. 3288 } 3289 unsigned DiagID = F.PragmaDiagMappings[Idx++]; 3290 if (DiagID == (unsigned)-1) { 3291 break; // no more diag/map pairs for this location. 3292 } 3293 diag::Mapping Map = (diag::Mapping)F.PragmaDiagMappings[Idx++]; 3294 Diag.setDiagnosticMapping(DiagID, Map, Loc); 3295 } 3296 } 3297 } 3298} 3299 3300/// \brief Get the correct cursor and offset for loading a type. 3301ASTReader::RecordLocation ASTReader::TypeCursorForIndex(unsigned Index) { 3302 GlobalTypeMapType::iterator I = GlobalTypeMap.find(Index); 3303 assert(I != GlobalTypeMap.end() && "Corrupted global type map"); 3304 Module *M = I->second; 3305 return RecordLocation(M, M->TypeOffsets[Index - M->BaseTypeIndex]); 3306} 3307 3308/// \brief Read and return the type with the given index.. 3309/// 3310/// The index is the type ID, shifted and minus the number of predefs. This 3311/// routine actually reads the record corresponding to the type at the given 3312/// location. It is a helper routine for GetType, which deals with reading type 3313/// IDs. 3314QualType ASTReader::readTypeRecord(unsigned Index) { 3315 RecordLocation Loc = TypeCursorForIndex(Index); 3316 llvm::BitstreamCursor &DeclsCursor = Loc.F->DeclsCursor; 3317 3318 // Keep track of where we are in the stream, then jump back there 3319 // after reading this type. 3320 SavedStreamPosition SavedPosition(DeclsCursor); 3321 3322 ReadingKindTracker ReadingKind(Read_Type, *this); 3323 3324 // Note that we are loading a type record. 3325 Deserializing AType(this); 3326 3327 unsigned Idx = 0; 3328 DeclsCursor.JumpToBit(Loc.Offset); 3329 RecordData Record; 3330 unsigned Code = DeclsCursor.ReadCode(); 3331 switch ((TypeCode)DeclsCursor.ReadRecord(Code, Record)) { 3332 case TYPE_EXT_QUAL: { 3333 if (Record.size() != 2) { 3334 Error("Incorrect encoding of extended qualifier type"); 3335 return QualType(); 3336 } 3337 QualType Base = readType(*Loc.F, Record, Idx); 3338 Qualifiers Quals = Qualifiers::fromOpaqueValue(Record[Idx++]); 3339 return Context->getQualifiedType(Base, Quals); 3340 } 3341 3342 case TYPE_COMPLEX: { 3343 if (Record.size() != 1) { 3344 Error("Incorrect encoding of complex type"); 3345 return QualType(); 3346 } 3347 QualType ElemType = readType(*Loc.F, Record, Idx); 3348 return Context->getComplexType(ElemType); 3349 } 3350 3351 case TYPE_POINTER: { 3352 if (Record.size() != 1) { 3353 Error("Incorrect encoding of pointer type"); 3354 return QualType(); 3355 } 3356 QualType PointeeType = readType(*Loc.F, Record, Idx); 3357 return Context->getPointerType(PointeeType); 3358 } 3359 3360 case TYPE_BLOCK_POINTER: { 3361 if (Record.size() != 1) { 3362 Error("Incorrect encoding of block pointer type"); 3363 return QualType(); 3364 } 3365 QualType PointeeType = readType(*Loc.F, Record, Idx); 3366 return Context->getBlockPointerType(PointeeType); 3367 } 3368 3369 case TYPE_LVALUE_REFERENCE: { 3370 if (Record.size() != 2) { 3371 Error("Incorrect encoding of lvalue reference type"); 3372 return QualType(); 3373 } 3374 QualType PointeeType = readType(*Loc.F, Record, Idx); 3375 return Context->getLValueReferenceType(PointeeType, Record[1]); 3376 } 3377 3378 case TYPE_RVALUE_REFERENCE: { 3379 if (Record.size() != 1) { 3380 Error("Incorrect encoding of rvalue reference type"); 3381 return QualType(); 3382 } 3383 QualType PointeeType = readType(*Loc.F, Record, Idx); 3384 return Context->getRValueReferenceType(PointeeType); 3385 } 3386 3387 case TYPE_MEMBER_POINTER: { 3388 if (Record.size() != 2) { 3389 Error("Incorrect encoding of member pointer type"); 3390 return QualType(); 3391 } 3392 QualType PointeeType = readType(*Loc.F, Record, Idx); 3393 QualType ClassType = readType(*Loc.F, Record, Idx); 3394 if (PointeeType.isNull() || ClassType.isNull()) 3395 return QualType(); 3396 3397 return Context->getMemberPointerType(PointeeType, ClassType.getTypePtr()); 3398 } 3399 3400 case TYPE_CONSTANT_ARRAY: { 3401 QualType ElementType = readType(*Loc.F, Record, Idx); 3402 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1]; 3403 unsigned IndexTypeQuals = Record[2]; 3404 unsigned Idx = 3; 3405 llvm::APInt Size = ReadAPInt(Record, Idx); 3406 return Context->getConstantArrayType(ElementType, Size, 3407 ASM, IndexTypeQuals); 3408 } 3409 3410 case TYPE_INCOMPLETE_ARRAY: { 3411 QualType ElementType = readType(*Loc.F, Record, Idx); 3412 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1]; 3413 unsigned IndexTypeQuals = Record[2]; 3414 return Context->getIncompleteArrayType(ElementType, ASM, IndexTypeQuals); 3415 } 3416 3417 case TYPE_VARIABLE_ARRAY: { 3418 QualType ElementType = readType(*Loc.F, Record, Idx); 3419 ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1]; 3420 unsigned IndexTypeQuals = Record[2]; 3421 SourceLocation LBLoc = ReadSourceLocation(*Loc.F, Record[3]); 3422 SourceLocation RBLoc = ReadSourceLocation(*Loc.F, Record[4]); 3423 return Context->getVariableArrayType(ElementType, ReadExpr(*Loc.F), 3424 ASM, IndexTypeQuals, 3425 SourceRange(LBLoc, RBLoc)); 3426 } 3427 3428 case TYPE_VECTOR: { 3429 if (Record.size() != 3) { 3430 Error("incorrect encoding of vector type in AST file"); 3431 return QualType(); 3432 } 3433 3434 QualType ElementType = readType(*Loc.F, Record, Idx); 3435 unsigned NumElements = Record[1]; 3436 unsigned VecKind = Record[2]; 3437 return Context->getVectorType(ElementType, NumElements, 3438 (VectorType::VectorKind)VecKind); 3439 } 3440 3441 case TYPE_EXT_VECTOR: { 3442 if (Record.size() != 3) { 3443 Error("incorrect encoding of extended vector type in AST file"); 3444 return QualType(); 3445 } 3446 3447 QualType ElementType = readType(*Loc.F, Record, Idx); 3448 unsigned NumElements = Record[1]; 3449 return Context->getExtVectorType(ElementType, NumElements); 3450 } 3451 3452 case TYPE_FUNCTION_NO_PROTO: { 3453 if (Record.size() != 6) { 3454 Error("incorrect encoding of no-proto function type"); 3455 return QualType(); 3456 } 3457 QualType ResultType = readType(*Loc.F, Record, Idx); 3458 FunctionType::ExtInfo Info(Record[1], Record[2], Record[3], 3459 (CallingConv)Record[4], Record[5]); 3460 return Context->getFunctionNoProtoType(ResultType, Info); 3461 } 3462 3463 case TYPE_FUNCTION_PROTO: { 3464 QualType ResultType = readType(*Loc.F, Record, Idx); 3465 3466 FunctionProtoType::ExtProtoInfo EPI; 3467 EPI.ExtInfo = FunctionType::ExtInfo(/*noreturn*/ Record[1], 3468 /*hasregparm*/ Record[2], 3469 /*regparm*/ Record[3], 3470 static_cast<CallingConv>(Record[4]), 3471 /*produces*/ Record[5]); 3472 3473 unsigned Idx = 6; 3474 unsigned NumParams = Record[Idx++]; 3475 SmallVector<QualType, 16> ParamTypes; 3476 for (unsigned I = 0; I != NumParams; ++I) 3477 ParamTypes.push_back(readType(*Loc.F, Record, Idx)); 3478 3479 EPI.Variadic = Record[Idx++]; 3480 EPI.TypeQuals = Record[Idx++]; 3481 EPI.RefQualifier = static_cast<RefQualifierKind>(Record[Idx++]); 3482 ExceptionSpecificationType EST = 3483 static_cast<ExceptionSpecificationType>(Record[Idx++]); 3484 EPI.ExceptionSpecType = EST; 3485 if (EST == EST_Dynamic) { 3486 EPI.NumExceptions = Record[Idx++]; 3487 SmallVector<QualType, 2> Exceptions; 3488 for (unsigned I = 0; I != EPI.NumExceptions; ++I) 3489 Exceptions.push_back(readType(*Loc.F, Record, Idx)); 3490 EPI.Exceptions = Exceptions.data(); 3491 } else if (EST == EST_ComputedNoexcept) { 3492 EPI.NoexceptExpr = ReadExpr(*Loc.F); 3493 } 3494 return Context->getFunctionType(ResultType, ParamTypes.data(), NumParams, 3495 EPI); 3496 } 3497 3498 case TYPE_UNRESOLVED_USING: { 3499 unsigned Idx = 0; 3500 return Context->getTypeDeclType( 3501 ReadDeclAs<UnresolvedUsingTypenameDecl>(*Loc.F, Record, Idx)); 3502 } 3503 3504 case TYPE_TYPEDEF: { 3505 if (Record.size() != 2) { 3506 Error("incorrect encoding of typedef type"); 3507 return QualType(); 3508 } 3509 unsigned Idx = 0; 3510 TypedefNameDecl *Decl = ReadDeclAs<TypedefNameDecl>(*Loc.F, Record, Idx); 3511 QualType Canonical = readType(*Loc.F, Record, Idx); 3512 if (!Canonical.isNull()) 3513 Canonical = Context->getCanonicalType(Canonical); 3514 return Context->getTypedefType(Decl, Canonical); 3515 } 3516 3517 case TYPE_TYPEOF_EXPR: 3518 return Context->getTypeOfExprType(ReadExpr(*Loc.F)); 3519 3520 case TYPE_TYPEOF: { 3521 if (Record.size() != 1) { 3522 Error("incorrect encoding of typeof(type) in AST file"); 3523 return QualType(); 3524 } 3525 QualType UnderlyingType = readType(*Loc.F, Record, Idx); 3526 return Context->getTypeOfType(UnderlyingType); 3527 } 3528 3529 case TYPE_DECLTYPE: 3530 return Context->getDecltypeType(ReadExpr(*Loc.F)); 3531 3532 case TYPE_UNARY_TRANSFORM: { 3533 QualType BaseType = readType(*Loc.F, Record, Idx); 3534 QualType UnderlyingType = readType(*Loc.F, Record, Idx); 3535 UnaryTransformType::UTTKind UKind = (UnaryTransformType::UTTKind)Record[2]; 3536 return Context->getUnaryTransformType(BaseType, UnderlyingType, UKind); 3537 } 3538 3539 case TYPE_AUTO: 3540 return Context->getAutoType(readType(*Loc.F, Record, Idx)); 3541 3542 case TYPE_RECORD: { 3543 if (Record.size() != 2) { 3544 Error("incorrect encoding of record type"); 3545 return QualType(); 3546 } 3547 unsigned Idx = 0; 3548 bool IsDependent = Record[Idx++]; 3549 QualType T 3550 = Context->getRecordType(ReadDeclAs<RecordDecl>(*Loc.F, Record, Idx)); 3551 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent); 3552 return T; 3553 } 3554 3555 case TYPE_ENUM: { 3556 if (Record.size() != 2) { 3557 Error("incorrect encoding of enum type"); 3558 return QualType(); 3559 } 3560 unsigned Idx = 0; 3561 bool IsDependent = Record[Idx++]; 3562 QualType T 3563 = Context->getEnumType(ReadDeclAs<EnumDecl>(*Loc.F, Record, Idx)); 3564 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent); 3565 return T; 3566 } 3567 3568 case TYPE_ATTRIBUTED: { 3569 if (Record.size() != 3) { 3570 Error("incorrect encoding of attributed type"); 3571 return QualType(); 3572 } 3573 QualType modifiedType = readType(*Loc.F, Record, Idx); 3574 QualType equivalentType = readType(*Loc.F, Record, Idx); 3575 AttributedType::Kind kind = static_cast<AttributedType::Kind>(Record[2]); 3576 return Context->getAttributedType(kind, modifiedType, equivalentType); 3577 } 3578 3579 case TYPE_PAREN: { 3580 if (Record.size() != 1) { 3581 Error("incorrect encoding of paren type"); 3582 return QualType(); 3583 } 3584 QualType InnerType = readType(*Loc.F, Record, Idx); 3585 return Context->getParenType(InnerType); 3586 } 3587 3588 case TYPE_PACK_EXPANSION: { 3589 if (Record.size() != 2) { 3590 Error("incorrect encoding of pack expansion type"); 3591 return QualType(); 3592 } 3593 QualType Pattern = readType(*Loc.F, Record, Idx); 3594 if (Pattern.isNull()) 3595 return QualType(); 3596 llvm::Optional<unsigned> NumExpansions; 3597 if (Record[1]) 3598 NumExpansions = Record[1] - 1; 3599 return Context->getPackExpansionType(Pattern, NumExpansions); 3600 } 3601 3602 case TYPE_ELABORATED: { 3603 unsigned Idx = 0; 3604 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++]; 3605 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(*Loc.F, Record, Idx); 3606 QualType NamedType = readType(*Loc.F, Record, Idx); 3607 return Context->getElaboratedType(Keyword, NNS, NamedType); 3608 } 3609 3610 case TYPE_OBJC_INTERFACE: { 3611 unsigned Idx = 0; 3612 ObjCInterfaceDecl *ItfD 3613 = ReadDeclAs<ObjCInterfaceDecl>(*Loc.F, Record, Idx); 3614 return Context->getObjCInterfaceType(ItfD); 3615 } 3616 3617 case TYPE_OBJC_OBJECT: { 3618 unsigned Idx = 0; 3619 QualType Base = readType(*Loc.F, Record, Idx); 3620 unsigned NumProtos = Record[Idx++]; 3621 SmallVector<ObjCProtocolDecl*, 4> Protos; 3622 for (unsigned I = 0; I != NumProtos; ++I) 3623 Protos.push_back(ReadDeclAs<ObjCProtocolDecl>(*Loc.F, Record, Idx)); 3624 return Context->getObjCObjectType(Base, Protos.data(), NumProtos); 3625 } 3626 3627 case TYPE_OBJC_OBJECT_POINTER: { 3628 unsigned Idx = 0; 3629 QualType Pointee = readType(*Loc.F, Record, Idx); 3630 return Context->getObjCObjectPointerType(Pointee); 3631 } 3632 3633 case TYPE_SUBST_TEMPLATE_TYPE_PARM: { 3634 unsigned Idx = 0; 3635 QualType Parm = readType(*Loc.F, Record, Idx); 3636 QualType Replacement = readType(*Loc.F, Record, Idx); 3637 return 3638 Context->getSubstTemplateTypeParmType(cast<TemplateTypeParmType>(Parm), 3639 Replacement); 3640 } 3641 3642 case TYPE_SUBST_TEMPLATE_TYPE_PARM_PACK: { 3643 unsigned Idx = 0; 3644 QualType Parm = readType(*Loc.F, Record, Idx); 3645 TemplateArgument ArgPack = ReadTemplateArgument(*Loc.F, Record, Idx); 3646 return Context->getSubstTemplateTypeParmPackType( 3647 cast<TemplateTypeParmType>(Parm), 3648 ArgPack); 3649 } 3650 3651 case TYPE_INJECTED_CLASS_NAME: { 3652 CXXRecordDecl *D = ReadDeclAs<CXXRecordDecl>(*Loc.F, Record, Idx); 3653 QualType TST = readType(*Loc.F, Record, Idx); // probably derivable 3654 // FIXME: ASTContext::getInjectedClassNameType is not currently suitable 3655 // for AST reading, too much interdependencies. 3656 return 3657 QualType(new (*Context, TypeAlignment) InjectedClassNameType(D, TST), 0); 3658 } 3659 3660 case TYPE_TEMPLATE_TYPE_PARM: { 3661 unsigned Idx = 0; 3662 unsigned Depth = Record[Idx++]; 3663 unsigned Index = Record[Idx++]; 3664 bool Pack = Record[Idx++]; 3665 TemplateTypeParmDecl *D 3666 = ReadDeclAs<TemplateTypeParmDecl>(*Loc.F, Record, Idx); 3667 return Context->getTemplateTypeParmType(Depth, Index, Pack, D); 3668 } 3669 3670 case TYPE_DEPENDENT_NAME: { 3671 unsigned Idx = 0; 3672 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++]; 3673 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(*Loc.F, Record, Idx); 3674 const IdentifierInfo *Name = this->GetIdentifierInfo(*Loc.F, Record, Idx); 3675 QualType Canon = readType(*Loc.F, Record, Idx); 3676 if (!Canon.isNull()) 3677 Canon = Context->getCanonicalType(Canon); 3678 return Context->getDependentNameType(Keyword, NNS, Name, Canon); 3679 } 3680 3681 case TYPE_DEPENDENT_TEMPLATE_SPECIALIZATION: { 3682 unsigned Idx = 0; 3683 ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++]; 3684 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(*Loc.F, Record, Idx); 3685 const IdentifierInfo *Name = this->GetIdentifierInfo(*Loc.F, Record, Idx); 3686 unsigned NumArgs = Record[Idx++]; 3687 SmallVector<TemplateArgument, 8> Args; 3688 Args.reserve(NumArgs); 3689 while (NumArgs--) 3690 Args.push_back(ReadTemplateArgument(*Loc.F, Record, Idx)); 3691 return Context->getDependentTemplateSpecializationType(Keyword, NNS, Name, 3692 Args.size(), Args.data()); 3693 } 3694 3695 case TYPE_DEPENDENT_SIZED_ARRAY: { 3696 unsigned Idx = 0; 3697 3698 // ArrayType 3699 QualType ElementType = readType(*Loc.F, Record, Idx); 3700 ArrayType::ArraySizeModifier ASM 3701 = (ArrayType::ArraySizeModifier)Record[Idx++]; 3702 unsigned IndexTypeQuals = Record[Idx++]; 3703 3704 // DependentSizedArrayType 3705 Expr *NumElts = ReadExpr(*Loc.F); 3706 SourceRange Brackets = ReadSourceRange(*Loc.F, Record, Idx); 3707 3708 return Context->getDependentSizedArrayType(ElementType, NumElts, ASM, 3709 IndexTypeQuals, Brackets); 3710 } 3711 3712 case TYPE_TEMPLATE_SPECIALIZATION: { 3713 unsigned Idx = 0; 3714 bool IsDependent = Record[Idx++]; 3715 TemplateName Name = ReadTemplateName(*Loc.F, Record, Idx); 3716 SmallVector<TemplateArgument, 8> Args; 3717 ReadTemplateArgumentList(Args, *Loc.F, Record, Idx); 3718 QualType Underlying = readType(*Loc.F, Record, Idx); 3719 QualType T; 3720 if (Underlying.isNull()) 3721 T = Context->getCanonicalTemplateSpecializationType(Name, Args.data(), 3722 Args.size()); 3723 else 3724 T = Context->getTemplateSpecializationType(Name, Args.data(), 3725 Args.size(), Underlying); 3726 const_cast<Type*>(T.getTypePtr())->setDependent(IsDependent); 3727 return T; 3728 } 3729 } 3730 // Suppress a GCC warning 3731 return QualType(); 3732} 3733 3734class clang::TypeLocReader : public TypeLocVisitor<TypeLocReader> { 3735 ASTReader &Reader; 3736 Module &F; 3737 llvm::BitstreamCursor &DeclsCursor; 3738 const ASTReader::RecordData &Record; 3739 unsigned &Idx; 3740 3741 SourceLocation ReadSourceLocation(const ASTReader::RecordData &R, 3742 unsigned &I) { 3743 return Reader.ReadSourceLocation(F, R, I); 3744 } 3745 3746 template<typename T> 3747 T *ReadDeclAs(const ASTReader::RecordData &Record, unsigned &Idx) { 3748 return Reader.ReadDeclAs<T>(F, Record, Idx); 3749 } 3750 3751public: 3752 TypeLocReader(ASTReader &Reader, Module &F, 3753 const ASTReader::RecordData &Record, unsigned &Idx) 3754 : Reader(Reader), F(F), DeclsCursor(F.DeclsCursor), Record(Record), Idx(Idx) 3755 { } 3756 3757 // We want compile-time assurance that we've enumerated all of 3758 // these, so unfortunately we have to declare them first, then 3759 // define them out-of-line. 3760#define ABSTRACT_TYPELOC(CLASS, PARENT) 3761#define TYPELOC(CLASS, PARENT) \ 3762 void Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc); 3763#include "clang/AST/TypeLocNodes.def" 3764 3765 void VisitFunctionTypeLoc(FunctionTypeLoc); 3766 void VisitArrayTypeLoc(ArrayTypeLoc); 3767}; 3768 3769void TypeLocReader::VisitQualifiedTypeLoc(QualifiedTypeLoc TL) { 3770 // nothing to do 3771} 3772void TypeLocReader::VisitBuiltinTypeLoc(BuiltinTypeLoc TL) { 3773 TL.setBuiltinLoc(ReadSourceLocation(Record, Idx)); 3774 if (TL.needsExtraLocalData()) { 3775 TL.setWrittenTypeSpec(static_cast<DeclSpec::TST>(Record[Idx++])); 3776 TL.setWrittenSignSpec(static_cast<DeclSpec::TSS>(Record[Idx++])); 3777 TL.setWrittenWidthSpec(static_cast<DeclSpec::TSW>(Record[Idx++])); 3778 TL.setModeAttr(Record[Idx++]); 3779 } 3780} 3781void TypeLocReader::VisitComplexTypeLoc(ComplexTypeLoc TL) { 3782 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3783} 3784void TypeLocReader::VisitPointerTypeLoc(PointerTypeLoc TL) { 3785 TL.setStarLoc(ReadSourceLocation(Record, Idx)); 3786} 3787void TypeLocReader::VisitBlockPointerTypeLoc(BlockPointerTypeLoc TL) { 3788 TL.setCaretLoc(ReadSourceLocation(Record, Idx)); 3789} 3790void TypeLocReader::VisitLValueReferenceTypeLoc(LValueReferenceTypeLoc TL) { 3791 TL.setAmpLoc(ReadSourceLocation(Record, Idx)); 3792} 3793void TypeLocReader::VisitRValueReferenceTypeLoc(RValueReferenceTypeLoc TL) { 3794 TL.setAmpAmpLoc(ReadSourceLocation(Record, Idx)); 3795} 3796void TypeLocReader::VisitMemberPointerTypeLoc(MemberPointerTypeLoc TL) { 3797 TL.setStarLoc(ReadSourceLocation(Record, Idx)); 3798 TL.setClassTInfo(Reader.GetTypeSourceInfo(F, Record, Idx)); 3799} 3800void TypeLocReader::VisitArrayTypeLoc(ArrayTypeLoc TL) { 3801 TL.setLBracketLoc(ReadSourceLocation(Record, Idx)); 3802 TL.setRBracketLoc(ReadSourceLocation(Record, Idx)); 3803 if (Record[Idx++]) 3804 TL.setSizeExpr(Reader.ReadExpr(F)); 3805 else 3806 TL.setSizeExpr(0); 3807} 3808void TypeLocReader::VisitConstantArrayTypeLoc(ConstantArrayTypeLoc TL) { 3809 VisitArrayTypeLoc(TL); 3810} 3811void TypeLocReader::VisitIncompleteArrayTypeLoc(IncompleteArrayTypeLoc TL) { 3812 VisitArrayTypeLoc(TL); 3813} 3814void TypeLocReader::VisitVariableArrayTypeLoc(VariableArrayTypeLoc TL) { 3815 VisitArrayTypeLoc(TL); 3816} 3817void TypeLocReader::VisitDependentSizedArrayTypeLoc( 3818 DependentSizedArrayTypeLoc TL) { 3819 VisitArrayTypeLoc(TL); 3820} 3821void TypeLocReader::VisitDependentSizedExtVectorTypeLoc( 3822 DependentSizedExtVectorTypeLoc TL) { 3823 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3824} 3825void TypeLocReader::VisitVectorTypeLoc(VectorTypeLoc TL) { 3826 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3827} 3828void TypeLocReader::VisitExtVectorTypeLoc(ExtVectorTypeLoc TL) { 3829 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3830} 3831void TypeLocReader::VisitFunctionTypeLoc(FunctionTypeLoc TL) { 3832 TL.setLocalRangeBegin(ReadSourceLocation(Record, Idx)); 3833 TL.setLocalRangeEnd(ReadSourceLocation(Record, Idx)); 3834 TL.setTrailingReturn(Record[Idx++]); 3835 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) { 3836 TL.setArg(i, ReadDeclAs<ParmVarDecl>(Record, Idx)); 3837 } 3838} 3839void TypeLocReader::VisitFunctionProtoTypeLoc(FunctionProtoTypeLoc TL) { 3840 VisitFunctionTypeLoc(TL); 3841} 3842void TypeLocReader::VisitFunctionNoProtoTypeLoc(FunctionNoProtoTypeLoc TL) { 3843 VisitFunctionTypeLoc(TL); 3844} 3845void TypeLocReader::VisitUnresolvedUsingTypeLoc(UnresolvedUsingTypeLoc TL) { 3846 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3847} 3848void TypeLocReader::VisitTypedefTypeLoc(TypedefTypeLoc TL) { 3849 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3850} 3851void TypeLocReader::VisitTypeOfExprTypeLoc(TypeOfExprTypeLoc TL) { 3852 TL.setTypeofLoc(ReadSourceLocation(Record, Idx)); 3853 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 3854 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 3855} 3856void TypeLocReader::VisitTypeOfTypeLoc(TypeOfTypeLoc TL) { 3857 TL.setTypeofLoc(ReadSourceLocation(Record, Idx)); 3858 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 3859 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 3860 TL.setUnderlyingTInfo(Reader.GetTypeSourceInfo(F, Record, Idx)); 3861} 3862void TypeLocReader::VisitDecltypeTypeLoc(DecltypeTypeLoc TL) { 3863 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3864} 3865void TypeLocReader::VisitUnaryTransformTypeLoc(UnaryTransformTypeLoc TL) { 3866 TL.setKWLoc(ReadSourceLocation(Record, Idx)); 3867 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 3868 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 3869 TL.setUnderlyingTInfo(Reader.GetTypeSourceInfo(F, Record, Idx)); 3870} 3871void TypeLocReader::VisitAutoTypeLoc(AutoTypeLoc TL) { 3872 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3873} 3874void TypeLocReader::VisitRecordTypeLoc(RecordTypeLoc TL) { 3875 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3876} 3877void TypeLocReader::VisitEnumTypeLoc(EnumTypeLoc TL) { 3878 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3879} 3880void TypeLocReader::VisitAttributedTypeLoc(AttributedTypeLoc TL) { 3881 TL.setAttrNameLoc(ReadSourceLocation(Record, Idx)); 3882 if (TL.hasAttrOperand()) { 3883 SourceRange range; 3884 range.setBegin(ReadSourceLocation(Record, Idx)); 3885 range.setEnd(ReadSourceLocation(Record, Idx)); 3886 TL.setAttrOperandParensRange(range); 3887 } 3888 if (TL.hasAttrExprOperand()) { 3889 if (Record[Idx++]) 3890 TL.setAttrExprOperand(Reader.ReadExpr(F)); 3891 else 3892 TL.setAttrExprOperand(0); 3893 } else if (TL.hasAttrEnumOperand()) 3894 TL.setAttrEnumOperandLoc(ReadSourceLocation(Record, Idx)); 3895} 3896void TypeLocReader::VisitTemplateTypeParmTypeLoc(TemplateTypeParmTypeLoc TL) { 3897 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3898} 3899void TypeLocReader::VisitSubstTemplateTypeParmTypeLoc( 3900 SubstTemplateTypeParmTypeLoc TL) { 3901 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3902} 3903void TypeLocReader::VisitSubstTemplateTypeParmPackTypeLoc( 3904 SubstTemplateTypeParmPackTypeLoc TL) { 3905 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3906} 3907void TypeLocReader::VisitTemplateSpecializationTypeLoc( 3908 TemplateSpecializationTypeLoc TL) { 3909 TL.setTemplateNameLoc(ReadSourceLocation(Record, Idx)); 3910 TL.setLAngleLoc(ReadSourceLocation(Record, Idx)); 3911 TL.setRAngleLoc(ReadSourceLocation(Record, Idx)); 3912 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 3913 TL.setArgLocInfo(i, 3914 Reader.GetTemplateArgumentLocInfo(F, 3915 TL.getTypePtr()->getArg(i).getKind(), 3916 Record, Idx)); 3917} 3918void TypeLocReader::VisitParenTypeLoc(ParenTypeLoc TL) { 3919 TL.setLParenLoc(ReadSourceLocation(Record, Idx)); 3920 TL.setRParenLoc(ReadSourceLocation(Record, Idx)); 3921} 3922void TypeLocReader::VisitElaboratedTypeLoc(ElaboratedTypeLoc TL) { 3923 TL.setKeywordLoc(ReadSourceLocation(Record, Idx)); 3924 TL.setQualifierLoc(Reader.ReadNestedNameSpecifierLoc(F, Record, Idx)); 3925} 3926void TypeLocReader::VisitInjectedClassNameTypeLoc(InjectedClassNameTypeLoc TL) { 3927 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3928} 3929void TypeLocReader::VisitDependentNameTypeLoc(DependentNameTypeLoc TL) { 3930 TL.setKeywordLoc(ReadSourceLocation(Record, Idx)); 3931 TL.setQualifierLoc(Reader.ReadNestedNameSpecifierLoc(F, Record, Idx)); 3932 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3933} 3934void TypeLocReader::VisitDependentTemplateSpecializationTypeLoc( 3935 DependentTemplateSpecializationTypeLoc TL) { 3936 TL.setKeywordLoc(ReadSourceLocation(Record, Idx)); 3937 TL.setQualifierLoc(Reader.ReadNestedNameSpecifierLoc(F, Record, Idx)); 3938 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3939 TL.setLAngleLoc(ReadSourceLocation(Record, Idx)); 3940 TL.setRAngleLoc(ReadSourceLocation(Record, Idx)); 3941 for (unsigned I = 0, E = TL.getNumArgs(); I != E; ++I) 3942 TL.setArgLocInfo(I, 3943 Reader.GetTemplateArgumentLocInfo(F, 3944 TL.getTypePtr()->getArg(I).getKind(), 3945 Record, Idx)); 3946} 3947void TypeLocReader::VisitPackExpansionTypeLoc(PackExpansionTypeLoc TL) { 3948 TL.setEllipsisLoc(ReadSourceLocation(Record, Idx)); 3949} 3950void TypeLocReader::VisitObjCInterfaceTypeLoc(ObjCInterfaceTypeLoc TL) { 3951 TL.setNameLoc(ReadSourceLocation(Record, Idx)); 3952} 3953void TypeLocReader::VisitObjCObjectTypeLoc(ObjCObjectTypeLoc TL) { 3954 TL.setHasBaseTypeAsWritten(Record[Idx++]); 3955 TL.setLAngleLoc(ReadSourceLocation(Record, Idx)); 3956 TL.setRAngleLoc(ReadSourceLocation(Record, Idx)); 3957 for (unsigned i = 0, e = TL.getNumProtocols(); i != e; ++i) 3958 TL.setProtocolLoc(i, ReadSourceLocation(Record, Idx)); 3959} 3960void TypeLocReader::VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL) { 3961 TL.setStarLoc(ReadSourceLocation(Record, Idx)); 3962} 3963 3964TypeSourceInfo *ASTReader::GetTypeSourceInfo(Module &F, 3965 const RecordData &Record, 3966 unsigned &Idx) { 3967 QualType InfoTy = readType(F, Record, Idx); 3968 if (InfoTy.isNull()) 3969 return 0; 3970 3971 TypeSourceInfo *TInfo = getContext()->CreateTypeSourceInfo(InfoTy); 3972 TypeLocReader TLR(*this, F, Record, Idx); 3973 for (TypeLoc TL = TInfo->getTypeLoc(); !TL.isNull(); TL = TL.getNextTypeLoc()) 3974 TLR.Visit(TL); 3975 return TInfo; 3976} 3977 3978QualType ASTReader::GetType(TypeID ID) { 3979 unsigned FastQuals = ID & Qualifiers::FastMask; 3980 unsigned Index = ID >> Qualifiers::FastWidth; 3981 3982 if (Index < NUM_PREDEF_TYPE_IDS) { 3983 QualType T; 3984 switch ((PredefinedTypeIDs)Index) { 3985 case PREDEF_TYPE_NULL_ID: return QualType(); 3986 case PREDEF_TYPE_VOID_ID: T = Context->VoidTy; break; 3987 case PREDEF_TYPE_BOOL_ID: T = Context->BoolTy; break; 3988 3989 case PREDEF_TYPE_CHAR_U_ID: 3990 case PREDEF_TYPE_CHAR_S_ID: 3991 // FIXME: Check that the signedness of CharTy is correct! 3992 T = Context->CharTy; 3993 break; 3994 3995 case PREDEF_TYPE_UCHAR_ID: T = Context->UnsignedCharTy; break; 3996 case PREDEF_TYPE_USHORT_ID: T = Context->UnsignedShortTy; break; 3997 case PREDEF_TYPE_UINT_ID: T = Context->UnsignedIntTy; break; 3998 case PREDEF_TYPE_ULONG_ID: T = Context->UnsignedLongTy; break; 3999 case PREDEF_TYPE_ULONGLONG_ID: T = Context->UnsignedLongLongTy; break; 4000 case PREDEF_TYPE_UINT128_ID: T = Context->UnsignedInt128Ty; break; 4001 case PREDEF_TYPE_SCHAR_ID: T = Context->SignedCharTy; break; 4002 case PREDEF_TYPE_WCHAR_ID: T = Context->WCharTy; break; 4003 case PREDEF_TYPE_SHORT_ID: T = Context->ShortTy; break; 4004 case PREDEF_TYPE_INT_ID: T = Context->IntTy; break; 4005 case PREDEF_TYPE_LONG_ID: T = Context->LongTy; break; 4006 case PREDEF_TYPE_LONGLONG_ID: T = Context->LongLongTy; break; 4007 case PREDEF_TYPE_INT128_ID: T = Context->Int128Ty; break; 4008 case PREDEF_TYPE_FLOAT_ID: T = Context->FloatTy; break; 4009 case PREDEF_TYPE_DOUBLE_ID: T = Context->DoubleTy; break; 4010 case PREDEF_TYPE_LONGDOUBLE_ID: T = Context->LongDoubleTy; break; 4011 case PREDEF_TYPE_OVERLOAD_ID: T = Context->OverloadTy; break; 4012 case PREDEF_TYPE_BOUND_MEMBER: T = Context->BoundMemberTy; break; 4013 case PREDEF_TYPE_DEPENDENT_ID: T = Context->DependentTy; break; 4014 case PREDEF_TYPE_UNKNOWN_ANY: T = Context->UnknownAnyTy; break; 4015 case PREDEF_TYPE_NULLPTR_ID: T = Context->NullPtrTy; break; 4016 case PREDEF_TYPE_CHAR16_ID: T = Context->Char16Ty; break; 4017 case PREDEF_TYPE_CHAR32_ID: T = Context->Char32Ty; break; 4018 case PREDEF_TYPE_OBJC_ID: T = Context->ObjCBuiltinIdTy; break; 4019 case PREDEF_TYPE_OBJC_CLASS: T = Context->ObjCBuiltinClassTy; break; 4020 case PREDEF_TYPE_OBJC_SEL: T = Context->ObjCBuiltinSelTy; break; 4021 case PREDEF_TYPE_AUTO_DEDUCT: T = Context->getAutoDeductType(); break; 4022 4023 case PREDEF_TYPE_AUTO_RREF_DEDUCT: 4024 T = Context->getAutoRRefDeductType(); 4025 break; 4026 } 4027 4028 assert(!T.isNull() && "Unknown predefined type"); 4029 return T.withFastQualifiers(FastQuals); 4030 } 4031 4032 Index -= NUM_PREDEF_TYPE_IDS; 4033 assert(Index < TypesLoaded.size() && "Type index out-of-range"); 4034 if (TypesLoaded[Index].isNull()) { 4035 TypesLoaded[Index] = readTypeRecord(Index); 4036 if (TypesLoaded[Index].isNull()) 4037 return QualType(); 4038 4039 TypesLoaded[Index]->setFromAST(); 4040 if (DeserializationListener) 4041 DeserializationListener->TypeRead(TypeIdx::fromTypeID(ID), 4042 TypesLoaded[Index]); 4043 } 4044 4045 return TypesLoaded[Index].withFastQualifiers(FastQuals); 4046} 4047 4048QualType ASTReader::getLocalType(Module &F, unsigned LocalID) { 4049 return GetType(getGlobalTypeID(F, LocalID)); 4050} 4051 4052serialization::TypeID 4053ASTReader::getGlobalTypeID(Module &F, unsigned LocalID) const { 4054 unsigned FastQuals = LocalID & Qualifiers::FastMask; 4055 unsigned LocalIndex = LocalID >> Qualifiers::FastWidth; 4056 4057 if (LocalIndex < NUM_PREDEF_TYPE_IDS) 4058 return LocalID; 4059 4060 ContinuousRangeMap<uint32_t, int, 2>::iterator I 4061 = F.TypeRemap.find(LocalIndex - NUM_PREDEF_TYPE_IDS); 4062 assert(I != F.TypeRemap.end() && "Invalid index into type index remap"); 4063 4064 unsigned GlobalIndex = LocalIndex + I->second; 4065 return (GlobalIndex << Qualifiers::FastWidth) | FastQuals; 4066} 4067 4068TemplateArgumentLocInfo 4069ASTReader::GetTemplateArgumentLocInfo(Module &F, 4070 TemplateArgument::ArgKind Kind, 4071 const RecordData &Record, 4072 unsigned &Index) { 4073 switch (Kind) { 4074 case TemplateArgument::Expression: 4075 return ReadExpr(F); 4076 case TemplateArgument::Type: 4077 return GetTypeSourceInfo(F, Record, Index); 4078 case TemplateArgument::Template: { 4079 NestedNameSpecifierLoc QualifierLoc = ReadNestedNameSpecifierLoc(F, Record, 4080 Index); 4081 SourceLocation TemplateNameLoc = ReadSourceLocation(F, Record, Index); 4082 return TemplateArgumentLocInfo(QualifierLoc, TemplateNameLoc, 4083 SourceLocation()); 4084 } 4085 case TemplateArgument::TemplateExpansion: { 4086 NestedNameSpecifierLoc QualifierLoc = ReadNestedNameSpecifierLoc(F, Record, 4087 Index); 4088 SourceLocation TemplateNameLoc = ReadSourceLocation(F, Record, Index); 4089 SourceLocation EllipsisLoc = ReadSourceLocation(F, Record, Index); 4090 return TemplateArgumentLocInfo(QualifierLoc, TemplateNameLoc, 4091 EllipsisLoc); 4092 } 4093 case TemplateArgument::Null: 4094 case TemplateArgument::Integral: 4095 case TemplateArgument::Declaration: 4096 case TemplateArgument::Pack: 4097 return TemplateArgumentLocInfo(); 4098 } 4099 llvm_unreachable("unexpected template argument loc"); 4100 return TemplateArgumentLocInfo(); 4101} 4102 4103TemplateArgumentLoc 4104ASTReader::ReadTemplateArgumentLoc(Module &F, 4105 const RecordData &Record, unsigned &Index) { 4106 TemplateArgument Arg = ReadTemplateArgument(F, Record, Index); 4107 4108 if (Arg.getKind() == TemplateArgument::Expression) { 4109 if (Record[Index++]) // bool InfoHasSameExpr. 4110 return TemplateArgumentLoc(Arg, TemplateArgumentLocInfo(Arg.getAsExpr())); 4111 } 4112 return TemplateArgumentLoc(Arg, GetTemplateArgumentLocInfo(F, Arg.getKind(), 4113 Record, Index)); 4114} 4115 4116Decl *ASTReader::GetExternalDecl(uint32_t ID) { 4117 return GetDecl(ID); 4118} 4119 4120uint64_t ASTReader::readCXXBaseSpecifiers(Module &M, const RecordData &Record, 4121 unsigned &Idx){ 4122 if (Idx >= Record.size()) 4123 return 0; 4124 4125 unsigned LocalID = Record[Idx++]; 4126 return getGlobalBitOffset(M, M.CXXBaseSpecifiersOffsets[LocalID - 1]); 4127} 4128 4129CXXBaseSpecifier *ASTReader::GetExternalCXXBaseSpecifiers(uint64_t Offset) { 4130 RecordLocation Loc = getLocalBitOffset(Offset); 4131 llvm::BitstreamCursor &Cursor = Loc.F->DeclsCursor; 4132 SavedStreamPosition SavedPosition(Cursor); 4133 Cursor.JumpToBit(Loc.Offset); 4134 ReadingKindTracker ReadingKind(Read_Decl, *this); 4135 RecordData Record; 4136 unsigned Code = Cursor.ReadCode(); 4137 unsigned RecCode = Cursor.ReadRecord(Code, Record); 4138 if (RecCode != DECL_CXX_BASE_SPECIFIERS) { 4139 Error("Malformed AST file: missing C++ base specifiers"); 4140 return 0; 4141 } 4142 4143 unsigned Idx = 0; 4144 unsigned NumBases = Record[Idx++]; 4145 void *Mem = Context->Allocate(sizeof(CXXBaseSpecifier) * NumBases); 4146 CXXBaseSpecifier *Bases = new (Mem) CXXBaseSpecifier [NumBases]; 4147 for (unsigned I = 0; I != NumBases; ++I) 4148 Bases[I] = ReadCXXBaseSpecifier(*Loc.F, Record, Idx); 4149 return Bases; 4150} 4151 4152TranslationUnitDecl *ASTReader::GetTranslationUnitDecl() { 4153 // FIXME: This routine might not even make sense when we're loading multiple 4154 // unrelated AST files, since we'll have to merge the translation units 4155 // somehow. 4156 unsigned TranslationUnitID = (*(ModuleMgr.end() - 1))->BaseDeclID + 1; 4157 if (!DeclsLoaded[TranslationUnitID - 1]) { 4158 ReadDeclRecord(TranslationUnitID); 4159 if (DeserializationListener) 4160 DeserializationListener->DeclRead(TranslationUnitID, 4161 DeclsLoaded[TranslationUnitID - 1]); 4162 } 4163 4164 return cast<TranslationUnitDecl>(DeclsLoaded[TranslationUnitID - 1]); 4165} 4166 4167serialization::DeclID 4168ASTReader::getGlobalDeclID(Module &F, unsigned LocalID) const { 4169 if (LocalID < NUM_PREDEF_DECL_IDS) 4170 return LocalID; 4171 4172 ContinuousRangeMap<uint32_t, int, 2>::iterator I 4173 = F.DeclRemap.find(LocalID - NUM_PREDEF_DECL_IDS); 4174 assert(I != F.DeclRemap.end() && "Invalid index into decl index remap"); 4175 4176 return LocalID + I->second; 4177} 4178 4179Decl *ASTReader::GetDecl(DeclID ID) { 4180 if (ID < NUM_PREDEF_DECL_IDS) { 4181 switch ((PredefinedDeclIDs)ID) { 4182 case serialization::PREDEF_DECL_NULL_ID: 4183 return 0; 4184 } 4185 4186 return 0; 4187 } 4188 4189 if (ID > DeclsLoaded.size()) { 4190 Error("declaration ID out-of-range for AST file"); 4191 return 0; 4192 } 4193 4194 unsigned Index = ID - NUM_PREDEF_DECL_IDS; 4195 if (!DeclsLoaded[Index]) { 4196 ReadDeclRecord(ID); 4197 if (DeserializationListener) 4198 DeserializationListener->DeclRead(ID, DeclsLoaded[Index]); 4199 } 4200 4201 return DeclsLoaded[Index]; 4202} 4203 4204serialization::DeclID ASTReader::ReadDeclID(Module &F, 4205 const RecordData &Record, 4206 unsigned &Idx) { 4207 if (Idx >= Record.size()) { 4208 Error("Corrupted AST file"); 4209 return 0; 4210 } 4211 4212 return getGlobalDeclID(F, Record[Idx++]); 4213} 4214 4215/// \brief Resolve the offset of a statement into a statement. 4216/// 4217/// This operation will read a new statement from the external 4218/// source each time it is called, and is meant to be used via a 4219/// LazyOffsetPtr (which is used by Decls for the body of functions, etc). 4220Stmt *ASTReader::GetExternalDeclStmt(uint64_t Offset) { 4221 // Switch case IDs are per Decl. 4222 ClearSwitchCaseIDs(); 4223 4224 // Offset here is a global offset across the entire chain. 4225 RecordLocation Loc = getLocalBitOffset(Offset); 4226 Loc.F->DeclsCursor.JumpToBit(Loc.Offset); 4227 return ReadStmtFromStream(*Loc.F); 4228} 4229 4230ExternalLoadResult ASTReader::FindExternalLexicalDecls(const DeclContext *DC, 4231 bool (*isKindWeWant)(Decl::Kind), 4232 SmallVectorImpl<Decl*> &Decls) { 4233 // There might be lexical decls in multiple parts of the chain, for the TU 4234 // at least. 4235 // DeclContextOffsets might reallocate as we load additional decls below, 4236 // so make a copy of the vector. 4237 DeclContextInfos Infos = DeclContextOffsets[DC]; 4238 for (DeclContextInfos::iterator I = Infos.begin(), E = Infos.end(); 4239 I != E; ++I) { 4240 // IDs can be 0 if this context doesn't contain declarations. 4241 if (!I->LexicalDecls) 4242 continue; 4243 4244 // Load all of the declaration IDs 4245 for (const KindDeclIDPair *ID = I->LexicalDecls, 4246 *IDE = ID + I->NumLexicalDecls; ID != IDE; ++ID) { 4247 if (isKindWeWant && !isKindWeWant((Decl::Kind)ID->first)) 4248 continue; 4249 4250 Decl *D = GetLocalDecl(*I->F, ID->second); 4251 assert(D && "Null decl in lexical decls"); 4252 Decls.push_back(D); 4253 } 4254 } 4255 4256 ++NumLexicalDeclContextsRead; 4257 return ELR_Success; 4258} 4259 4260DeclContext::lookup_result 4261ASTReader::FindExternalVisibleDeclsByName(const DeclContext *DC, 4262 DeclarationName Name) { 4263 assert(DC->hasExternalVisibleStorage() && 4264 "DeclContext has no visible decls in storage"); 4265 if (!Name) 4266 return DeclContext::lookup_result(DeclContext::lookup_iterator(0), 4267 DeclContext::lookup_iterator(0)); 4268 4269 SmallVector<NamedDecl *, 64> Decls; 4270 // There might be visible decls in multiple parts of the chain, for the TU 4271 // and namespaces. For any given name, the last available results replace 4272 // all earlier ones. For this reason, we walk in reverse. 4273 DeclContextInfos &Infos = DeclContextOffsets[DC]; 4274 for (DeclContextInfos::reverse_iterator I = Infos.rbegin(), E = Infos.rend(); 4275 I != E; ++I) { 4276 if (!I->NameLookupTableData) 4277 continue; 4278 4279 ASTDeclContextNameLookupTable *LookupTable = 4280 (ASTDeclContextNameLookupTable*)I->NameLookupTableData; 4281 ASTDeclContextNameLookupTable::iterator Pos = LookupTable->find(Name); 4282 if (Pos == LookupTable->end()) 4283 continue; 4284 4285 ASTDeclContextNameLookupTrait::data_type Data = *Pos; 4286 for (; Data.first != Data.second; ++Data.first) { 4287 NamedDecl *ND = GetLocalDeclAs<NamedDecl>(*I->F, *Data.first); 4288 if (!ND) 4289 continue; 4290 4291 if (ND->getDeclName() != Name) { 4292 assert(!Name.getCXXNameType().isNull() && 4293 "Name mismatch without a type"); 4294 continue; 4295 } 4296 4297 Decls.push_back(ND); 4298 } 4299 4300 // If we rejected all of the declarations we found, e.g., because the 4301 // name didn't actually match, continue looking through DeclContexts. 4302 if (Decls.empty()) 4303 continue; 4304 4305 break; 4306 } 4307 4308 ++NumVisibleDeclContextsRead; 4309 4310 SetExternalVisibleDeclsForName(DC, Name, Decls); 4311 return const_cast<DeclContext*>(DC)->lookup(Name); 4312} 4313 4314void ASTReader::MaterializeVisibleDecls(const DeclContext *DC) { 4315 assert(DC->hasExternalVisibleStorage() && 4316 "DeclContext has no visible decls in storage"); 4317 4318 SmallVector<NamedDecl *, 64> Decls; 4319 // There might be visible decls in multiple parts of the chain, for the TU 4320 // and namespaces. 4321 DeclContextInfos &Infos = DeclContextOffsets[DC]; 4322 for (DeclContextInfos::iterator I = Infos.begin(), E = Infos.end(); 4323 I != E; ++I) { 4324 if (!I->NameLookupTableData) 4325 continue; 4326 4327 ASTDeclContextNameLookupTable *LookupTable = 4328 (ASTDeclContextNameLookupTable*)I->NameLookupTableData; 4329 for (ASTDeclContextNameLookupTable::item_iterator 4330 ItemI = LookupTable->item_begin(), 4331 ItemEnd = LookupTable->item_end() ; ItemI != ItemEnd; ++ItemI) { 4332 ASTDeclContextNameLookupTable::item_iterator::value_type Val 4333 = *ItemI; 4334 ASTDeclContextNameLookupTrait::data_type Data = Val.second; 4335 Decls.clear(); 4336 for (; Data.first != Data.second; ++Data.first) 4337 Decls.push_back(GetLocalDeclAs<NamedDecl>(*I->F, *Data.first)); 4338 MaterializeVisibleDeclsForName(DC, Val.first, Decls); 4339 } 4340 } 4341} 4342 4343void ASTReader::PassInterestingDeclsToConsumer() { 4344 assert(Consumer); 4345 while (!InterestingDecls.empty()) { 4346 DeclGroupRef DG(InterestingDecls.front()); 4347 InterestingDecls.pop_front(); 4348 Consumer->HandleInterestingDecl(DG); 4349 } 4350} 4351 4352void ASTReader::StartTranslationUnit(ASTConsumer *Consumer) { 4353 this->Consumer = Consumer; 4354 4355 if (!Consumer) 4356 return; 4357 4358 for (unsigned I = 0, N = ExternalDefinitions.size(); I != N; ++I) { 4359 // Force deserialization of this decl, which will cause it to be queued for 4360 // passing to the consumer. 4361 GetDecl(ExternalDefinitions[I]); 4362 } 4363 4364 PassInterestingDeclsToConsumer(); 4365} 4366 4367void ASTReader::PrintStats() { 4368 std::fprintf(stderr, "*** AST File Statistics:\n"); 4369 4370 unsigned NumTypesLoaded 4371 = TypesLoaded.size() - std::count(TypesLoaded.begin(), TypesLoaded.end(), 4372 QualType()); 4373 unsigned NumDeclsLoaded 4374 = DeclsLoaded.size() - std::count(DeclsLoaded.begin(), DeclsLoaded.end(), 4375 (Decl *)0); 4376 unsigned NumIdentifiersLoaded 4377 = IdentifiersLoaded.size() - std::count(IdentifiersLoaded.begin(), 4378 IdentifiersLoaded.end(), 4379 (IdentifierInfo *)0); 4380 unsigned NumSelectorsLoaded 4381 = SelectorsLoaded.size() - std::count(SelectorsLoaded.begin(), 4382 SelectorsLoaded.end(), 4383 Selector()); 4384 4385 std::fprintf(stderr, " %u stat cache hits\n", NumStatHits); 4386 std::fprintf(stderr, " %u stat cache misses\n", NumStatMisses); 4387 if (unsigned TotalNumSLocEntries = getTotalNumSLocs()) 4388 std::fprintf(stderr, " %u/%u source location entries read (%f%%)\n", 4389 NumSLocEntriesRead, TotalNumSLocEntries, 4390 ((float)NumSLocEntriesRead/TotalNumSLocEntries * 100)); 4391 if (!TypesLoaded.empty()) 4392 std::fprintf(stderr, " %u/%u types read (%f%%)\n", 4393 NumTypesLoaded, (unsigned)TypesLoaded.size(), 4394 ((float)NumTypesLoaded/TypesLoaded.size() * 100)); 4395 if (!DeclsLoaded.empty()) 4396 std::fprintf(stderr, " %u/%u declarations read (%f%%)\n", 4397 NumDeclsLoaded, (unsigned)DeclsLoaded.size(), 4398 ((float)NumDeclsLoaded/DeclsLoaded.size() * 100)); 4399 if (!IdentifiersLoaded.empty()) 4400 std::fprintf(stderr, " %u/%u identifiers read (%f%%)\n", 4401 NumIdentifiersLoaded, (unsigned)IdentifiersLoaded.size(), 4402 ((float)NumIdentifiersLoaded/IdentifiersLoaded.size() * 100)); 4403 if (!SelectorsLoaded.empty()) 4404 std::fprintf(stderr, " %u/%u selectors read (%f%%)\n", 4405 NumSelectorsLoaded, (unsigned)SelectorsLoaded.size(), 4406 ((float)NumSelectorsLoaded/SelectorsLoaded.size() * 100)); 4407 if (TotalNumStatements) 4408 std::fprintf(stderr, " %u/%u statements read (%f%%)\n", 4409 NumStatementsRead, TotalNumStatements, 4410 ((float)NumStatementsRead/TotalNumStatements * 100)); 4411 if (TotalNumMacros) 4412 std::fprintf(stderr, " %u/%u macros read (%f%%)\n", 4413 NumMacrosRead, TotalNumMacros, 4414 ((float)NumMacrosRead/TotalNumMacros * 100)); 4415 if (TotalLexicalDeclContexts) 4416 std::fprintf(stderr, " %u/%u lexical declcontexts read (%f%%)\n", 4417 NumLexicalDeclContextsRead, TotalLexicalDeclContexts, 4418 ((float)NumLexicalDeclContextsRead/TotalLexicalDeclContexts 4419 * 100)); 4420 if (TotalVisibleDeclContexts) 4421 std::fprintf(stderr, " %u/%u visible declcontexts read (%f%%)\n", 4422 NumVisibleDeclContextsRead, TotalVisibleDeclContexts, 4423 ((float)NumVisibleDeclContextsRead/TotalVisibleDeclContexts 4424 * 100)); 4425 if (TotalNumMethodPoolEntries) { 4426 std::fprintf(stderr, " %u/%u method pool entries read (%f%%)\n", 4427 NumMethodPoolEntriesRead, TotalNumMethodPoolEntries, 4428 ((float)NumMethodPoolEntriesRead/TotalNumMethodPoolEntries 4429 * 100)); 4430 std::fprintf(stderr, " %u method pool misses\n", NumMethodPoolMisses); 4431 } 4432 std::fprintf(stderr, "\n"); 4433 dump(); 4434 std::fprintf(stderr, "\n"); 4435} 4436 4437template<typename Key, typename Module, unsigned InitialCapacity> 4438static void 4439dumpModuleIDMap(StringRef Name, 4440 const ContinuousRangeMap<Key, Module *, 4441 InitialCapacity> &Map) { 4442 if (Map.begin() == Map.end()) 4443 return; 4444 4445 typedef ContinuousRangeMap<Key, Module *, InitialCapacity> MapType; 4446 llvm::errs() << Name << ":\n"; 4447 for (typename MapType::const_iterator I = Map.begin(), IEnd = Map.end(); 4448 I != IEnd; ++I) { 4449 llvm::errs() << " " << I->first << " -> " << I->second->FileName 4450 << "\n"; 4451 } 4452} 4453 4454void ASTReader::dump() { 4455 llvm::errs() << "*** PCH/Module Remappings:\n"; 4456 dumpModuleIDMap("Global bit offset map", GlobalBitOffsetsMap); 4457 dumpModuleIDMap("Global source location entry map", GlobalSLocEntryMap); 4458 dumpModuleIDMap("Global type map", GlobalTypeMap); 4459 dumpModuleIDMap("Global declaration map", GlobalDeclMap); 4460 dumpModuleIDMap("Global identifier map", GlobalIdentifierMap); 4461 dumpModuleIDMap("Global selector map", GlobalSelectorMap); 4462 dumpModuleIDMap("Global macro definition map", GlobalMacroDefinitionMap); 4463 dumpModuleIDMap("Global preprocessed entity map", 4464 GlobalPreprocessedEntityMap); 4465 4466 llvm::errs() << "\n*** PCH/Modules Loaded:"; 4467 for (ModuleManager::ModuleConstIterator M = ModuleMgr.begin(), 4468 MEnd = ModuleMgr.end(); 4469 M != MEnd; ++M) 4470 (*M)->dump(); 4471} 4472 4473/// Return the amount of memory used by memory buffers, breaking down 4474/// by heap-backed versus mmap'ed memory. 4475void ASTReader::getMemoryBufferSizes(MemoryBufferSizes &sizes) const { 4476 for (ModuleConstIterator I = ModuleMgr.begin(), 4477 E = ModuleMgr.end(); I != E; ++I) { 4478 if (llvm::MemoryBuffer *buf = (*I)->Buffer.get()) { 4479 size_t bytes = buf->getBufferSize(); 4480 switch (buf->getBufferKind()) { 4481 case llvm::MemoryBuffer::MemoryBuffer_Malloc: 4482 sizes.malloc_bytes += bytes; 4483 break; 4484 case llvm::MemoryBuffer::MemoryBuffer_MMap: 4485 sizes.mmap_bytes += bytes; 4486 break; 4487 } 4488 } 4489 } 4490} 4491 4492void ASTReader::InitializeSema(Sema &S) { 4493 SemaObj = &S; 4494 S.ExternalSource = this; 4495 4496 // Makes sure any declarations that were deserialized "too early" 4497 // still get added to the identifier's declaration chains. 4498 for (unsigned I = 0, N = PreloadedDecls.size(); I != N; ++I) { 4499 if (SemaObj->TUScope) 4500 SemaObj->TUScope->AddDecl(PreloadedDecls[I]); 4501 4502 SemaObj->IdResolver.AddDecl(PreloadedDecls[I]); 4503 } 4504 PreloadedDecls.clear(); 4505 4506 // Load the offsets of the declarations that Sema references. 4507 // They will be lazily deserialized when needed. 4508 if (!SemaDeclRefs.empty()) { 4509 assert(SemaDeclRefs.size() == 2 && "More decl refs than expected!"); 4510 if (!SemaObj->StdNamespace) 4511 SemaObj->StdNamespace = SemaDeclRefs[0]; 4512 if (!SemaObj->StdBadAlloc) 4513 SemaObj->StdBadAlloc = SemaDeclRefs[1]; 4514 } 4515 4516 if (!FPPragmaOptions.empty()) { 4517 assert(FPPragmaOptions.size() == 1 && "Wrong number of FP_PRAGMA_OPTIONS"); 4518 SemaObj->FPFeatures.fp_contract = FPPragmaOptions[0]; 4519 } 4520 4521 if (!OpenCLExtensions.empty()) { 4522 unsigned I = 0; 4523#define OPENCLEXT(nm) SemaObj->OpenCLFeatures.nm = OpenCLExtensions[I++]; 4524#include "clang/Basic/OpenCLExtensions.def" 4525 4526 assert(OpenCLExtensions.size() == I && "Wrong number of OPENCL_EXTENSIONS"); 4527 } 4528} 4529 4530IdentifierInfo* ASTReader::get(const char *NameStart, const char *NameEnd) { 4531 // Try to find this name within our on-disk hash tables. We start with the 4532 // most recent one, since that one contains the most up-to-date info. 4533 for (ModuleIterator I = ModuleMgr.begin(), E = ModuleMgr.end(); I != E; ++I) { 4534 ASTIdentifierLookupTable *IdTable 4535 = (ASTIdentifierLookupTable *)(*I)->IdentifierLookupTable; 4536 if (!IdTable) 4537 continue; 4538 std::pair<const char*, unsigned> Key(NameStart, NameEnd - NameStart); 4539 ASTIdentifierLookupTable::iterator Pos = IdTable->find(Key); 4540 if (Pos == IdTable->end()) 4541 continue; 4542 4543 // Dereferencing the iterator has the effect of building the 4544 // IdentifierInfo node and populating it with the various 4545 // declarations it needs. 4546 return *Pos; 4547 } 4548 return 0; 4549} 4550 4551namespace clang { 4552 /// \brief An identifier-lookup iterator that enumerates all of the 4553 /// identifiers stored within a set of AST files. 4554 class ASTIdentifierIterator : public IdentifierIterator { 4555 /// \brief The AST reader whose identifiers are being enumerated. 4556 const ASTReader &Reader; 4557 4558 /// \brief The current index into the chain of AST files stored in 4559 /// the AST reader. 4560 unsigned Index; 4561 4562 /// \brief The current position within the identifier lookup table 4563 /// of the current AST file. 4564 ASTIdentifierLookupTable::key_iterator Current; 4565 4566 /// \brief The end position within the identifier lookup table of 4567 /// the current AST file. 4568 ASTIdentifierLookupTable::key_iterator End; 4569 4570 public: 4571 explicit ASTIdentifierIterator(const ASTReader &Reader); 4572 4573 virtual StringRef Next(); 4574 }; 4575} 4576 4577ASTIdentifierIterator::ASTIdentifierIterator(const ASTReader &Reader) 4578 : Reader(Reader), Index(Reader.ModuleMgr.size() - 1) { 4579 ASTIdentifierLookupTable *IdTable 4580 = (ASTIdentifierLookupTable *)Reader.ModuleMgr[Index].IdentifierLookupTable; 4581 Current = IdTable->key_begin(); 4582 End = IdTable->key_end(); 4583} 4584 4585StringRef ASTIdentifierIterator::Next() { 4586 while (Current == End) { 4587 // If we have exhausted all of our AST files, we're done. 4588 if (Index == 0) 4589 return StringRef(); 4590 4591 --Index; 4592 ASTIdentifierLookupTable *IdTable 4593 = (ASTIdentifierLookupTable *)Reader.ModuleMgr[Index]. 4594 IdentifierLookupTable; 4595 Current = IdTable->key_begin(); 4596 End = IdTable->key_end(); 4597 } 4598 4599 // We have any identifiers remaining in the current AST file; return 4600 // the next one. 4601 std::pair<const char*, unsigned> Key = *Current; 4602 ++Current; 4603 return StringRef(Key.first, Key.second); 4604} 4605 4606IdentifierIterator *ASTReader::getIdentifiers() const { 4607 return new ASTIdentifierIterator(*this); 4608} 4609 4610std::pair<ObjCMethodList, ObjCMethodList> 4611ASTReader::ReadMethodPool(Selector Sel) { 4612 // Find this selector in a hash table. We want to find the most recent entry. 4613 for (ModuleIterator I = ModuleMgr.begin(), E = ModuleMgr.end(); I != E; ++I) { 4614 Module &F = *(*I); 4615 if (!F.SelectorLookupTable) 4616 continue; 4617 4618 ASTSelectorLookupTable *PoolTable 4619 = (ASTSelectorLookupTable*)F.SelectorLookupTable; 4620 ASTSelectorLookupTable::iterator Pos = PoolTable->find(Sel); 4621 if (Pos != PoolTable->end()) { 4622 ++NumSelectorsRead; 4623 // FIXME: Not quite happy with the statistics here. We probably should 4624 // disable this tracking when called via LoadSelector. 4625 // Also, should entries without methods count as misses? 4626 ++NumMethodPoolEntriesRead; 4627 ASTSelectorLookupTrait::data_type Data = *Pos; 4628 if (DeserializationListener) 4629 DeserializationListener->SelectorRead(Data.ID, Sel); 4630 return std::make_pair(Data.Instance, Data.Factory); 4631 } 4632 } 4633 4634 ++NumMethodPoolMisses; 4635 return std::pair<ObjCMethodList, ObjCMethodList>(); 4636} 4637 4638void ASTReader::ReadKnownNamespaces( 4639 SmallVectorImpl<NamespaceDecl *> &Namespaces) { 4640 Namespaces.clear(); 4641 4642 for (unsigned I = 0, N = KnownNamespaces.size(); I != N; ++I) { 4643 if (NamespaceDecl *Namespace 4644 = dyn_cast_or_null<NamespaceDecl>(GetDecl(KnownNamespaces[I]))) 4645 Namespaces.push_back(Namespace); 4646 } 4647} 4648 4649void ASTReader::ReadTentativeDefinitions( 4650 SmallVectorImpl<VarDecl *> &TentativeDefs) { 4651 for (unsigned I = 0, N = TentativeDefinitions.size(); I != N; ++I) { 4652 VarDecl *Var = dyn_cast_or_null<VarDecl>(GetDecl(TentativeDefinitions[I])); 4653 if (Var) 4654 TentativeDefs.push_back(Var); 4655 } 4656 TentativeDefinitions.clear(); 4657} 4658 4659void ASTReader::ReadUnusedFileScopedDecls( 4660 SmallVectorImpl<const DeclaratorDecl *> &Decls) { 4661 for (unsigned I = 0, N = UnusedFileScopedDecls.size(); I != N; ++I) { 4662 DeclaratorDecl *D 4663 = dyn_cast_or_null<DeclaratorDecl>(GetDecl(UnusedFileScopedDecls[I])); 4664 if (D) 4665 Decls.push_back(D); 4666 } 4667 UnusedFileScopedDecls.clear(); 4668} 4669 4670void ASTReader::ReadDelegatingConstructors( 4671 SmallVectorImpl<CXXConstructorDecl *> &Decls) { 4672 for (unsigned I = 0, N = DelegatingCtorDecls.size(); I != N; ++I) { 4673 CXXConstructorDecl *D 4674 = dyn_cast_or_null<CXXConstructorDecl>(GetDecl(DelegatingCtorDecls[I])); 4675 if (D) 4676 Decls.push_back(D); 4677 } 4678 DelegatingCtorDecls.clear(); 4679} 4680 4681void ASTReader::ReadExtVectorDecls(SmallVectorImpl<TypedefNameDecl *> &Decls) { 4682 for (unsigned I = 0, N = ExtVectorDecls.size(); I != N; ++I) { 4683 TypedefNameDecl *D 4684 = dyn_cast_or_null<TypedefNameDecl>(GetDecl(ExtVectorDecls[I])); 4685 if (D) 4686 Decls.push_back(D); 4687 } 4688 ExtVectorDecls.clear(); 4689} 4690 4691void ASTReader::ReadDynamicClasses(SmallVectorImpl<CXXRecordDecl *> &Decls) { 4692 for (unsigned I = 0, N = DynamicClasses.size(); I != N; ++I) { 4693 CXXRecordDecl *D 4694 = dyn_cast_or_null<CXXRecordDecl>(GetDecl(DynamicClasses[I])); 4695 if (D) 4696 Decls.push_back(D); 4697 } 4698 DynamicClasses.clear(); 4699} 4700 4701void 4702ASTReader::ReadLocallyScopedExternalDecls(SmallVectorImpl<NamedDecl *> &Decls) { 4703 for (unsigned I = 0, N = LocallyScopedExternalDecls.size(); I != N; ++I) { 4704 NamedDecl *D 4705 = dyn_cast_or_null<NamedDecl>(GetDecl(LocallyScopedExternalDecls[I])); 4706 if (D) 4707 Decls.push_back(D); 4708 } 4709 LocallyScopedExternalDecls.clear(); 4710} 4711 4712void ASTReader::ReadReferencedSelectors( 4713 SmallVectorImpl<std::pair<Selector, SourceLocation> > &Sels) { 4714 if (ReferencedSelectorsData.empty()) 4715 return; 4716 4717 // If there are @selector references added them to its pool. This is for 4718 // implementation of -Wselector. 4719 unsigned int DataSize = ReferencedSelectorsData.size()-1; 4720 unsigned I = 0; 4721 while (I < DataSize) { 4722 Selector Sel = DecodeSelector(ReferencedSelectorsData[I++]); 4723 SourceLocation SelLoc 4724 = SourceLocation::getFromRawEncoding(ReferencedSelectorsData[I++]); 4725 Sels.push_back(std::make_pair(Sel, SelLoc)); 4726 } 4727 ReferencedSelectorsData.clear(); 4728} 4729 4730void ASTReader::ReadWeakUndeclaredIdentifiers( 4731 SmallVectorImpl<std::pair<IdentifierInfo *, WeakInfo> > &WeakIDs) { 4732 if (WeakUndeclaredIdentifiers.empty()) 4733 return; 4734 4735 for (unsigned I = 0, N = WeakUndeclaredIdentifiers.size(); I < N; /*none*/) { 4736 IdentifierInfo *WeakId 4737 = DecodeIdentifierInfo(WeakUndeclaredIdentifiers[I++]); 4738 IdentifierInfo *AliasId 4739 = DecodeIdentifierInfo(WeakUndeclaredIdentifiers[I++]); 4740 SourceLocation Loc 4741 = SourceLocation::getFromRawEncoding(WeakUndeclaredIdentifiers[I++]); 4742 bool Used = WeakUndeclaredIdentifiers[I++]; 4743 WeakInfo WI(AliasId, Loc); 4744 WI.setUsed(Used); 4745 WeakIDs.push_back(std::make_pair(WeakId, WI)); 4746 } 4747 WeakUndeclaredIdentifiers.clear(); 4748} 4749 4750void ASTReader::ReadUsedVTables(SmallVectorImpl<ExternalVTableUse> &VTables) { 4751 for (unsigned Idx = 0, N = VTableUses.size(); Idx < N; /* In loop */) { 4752 ExternalVTableUse VT; 4753 VT.Record = dyn_cast_or_null<CXXRecordDecl>(GetDecl(VTableUses[Idx++])); 4754 VT.Location = SourceLocation::getFromRawEncoding(VTableUses[Idx++]); 4755 VT.DefinitionRequired = VTableUses[Idx++]; 4756 VTables.push_back(VT); 4757 } 4758 4759 VTableUses.clear(); 4760} 4761 4762void ASTReader::ReadPendingInstantiations( 4763 SmallVectorImpl<std::pair<ValueDecl *, SourceLocation> > &Pending) { 4764 for (unsigned Idx = 0, N = PendingInstantiations.size(); Idx < N;) { 4765 ValueDecl *D = cast<ValueDecl>(GetDecl(PendingInstantiations[Idx++])); 4766 SourceLocation Loc 4767 = SourceLocation::getFromRawEncoding(PendingInstantiations[Idx++]); 4768 Pending.push_back(std::make_pair(D, Loc)); 4769 } 4770 PendingInstantiations.clear(); 4771} 4772 4773void ASTReader::LoadSelector(Selector Sel) { 4774 // It would be complicated to avoid reading the methods anyway. So don't. 4775 ReadMethodPool(Sel); 4776} 4777 4778void ASTReader::SetIdentifierInfo(IdentifierID ID, IdentifierInfo *II) { 4779 assert(ID && "Non-zero identifier ID required"); 4780 assert(ID <= IdentifiersLoaded.size() && "identifier ID out of range"); 4781 IdentifiersLoaded[ID - 1] = II; 4782 if (DeserializationListener) 4783 DeserializationListener->IdentifierRead(ID, II); 4784} 4785 4786/// \brief Set the globally-visible declarations associated with the given 4787/// identifier. 4788/// 4789/// If the AST reader is currently in a state where the given declaration IDs 4790/// cannot safely be resolved, they are queued until it is safe to resolve 4791/// them. 4792/// 4793/// \param II an IdentifierInfo that refers to one or more globally-visible 4794/// declarations. 4795/// 4796/// \param DeclIDs the set of declaration IDs with the name @p II that are 4797/// visible at global scope. 4798/// 4799/// \param Nonrecursive should be true to indicate that the caller knows that 4800/// this call is non-recursive, and therefore the globally-visible declarations 4801/// will not be placed onto the pending queue. 4802void 4803ASTReader::SetGloballyVisibleDecls(IdentifierInfo *II, 4804 const SmallVectorImpl<uint32_t> &DeclIDs, 4805 bool Nonrecursive) { 4806 if (NumCurrentElementsDeserializing && !Nonrecursive) { 4807 PendingIdentifierInfos.push_back(PendingIdentifierInfo()); 4808 PendingIdentifierInfo &PII = PendingIdentifierInfos.back(); 4809 PII.II = II; 4810 PII.DeclIDs.append(DeclIDs.begin(), DeclIDs.end()); 4811 return; 4812 } 4813 4814 for (unsigned I = 0, N = DeclIDs.size(); I != N; ++I) { 4815 NamedDecl *D = cast<NamedDecl>(GetDecl(DeclIDs[I])); 4816 if (SemaObj) { 4817 if (SemaObj->TUScope) { 4818 // Introduce this declaration into the translation-unit scope 4819 // and add it to the declaration chain for this identifier, so 4820 // that (unqualified) name lookup will find it. 4821 SemaObj->TUScope->AddDecl(D); 4822 } 4823 SemaObj->IdResolver.AddDeclToIdentifierChain(II, D); 4824 } else { 4825 // Queue this declaration so that it will be added to the 4826 // translation unit scope and identifier's declaration chain 4827 // once a Sema object is known. 4828 PreloadedDecls.push_back(D); 4829 } 4830 } 4831} 4832 4833IdentifierInfo *ASTReader::DecodeIdentifierInfo(IdentifierID ID) { 4834 if (ID == 0) 4835 return 0; 4836 4837 if (IdentifiersLoaded.empty()) { 4838 Error("no identifier table in AST file"); 4839 return 0; 4840 } 4841 4842 assert(PP && "Forgot to set Preprocessor ?"); 4843 ID -= 1; 4844 if (!IdentifiersLoaded[ID]) { 4845 GlobalIdentifierMapType::iterator I = GlobalIdentifierMap.find(ID + 1); 4846 assert(I != GlobalIdentifierMap.end() && "Corrupted global identifier map"); 4847 Module *M = I->second; 4848 unsigned Index = ID - M->BaseIdentifierID; 4849 const char *Str = M->IdentifierTableData + M->IdentifierOffsets[Index]; 4850 4851 // All of the strings in the AST file are preceded by a 16-bit length. 4852 // Extract that 16-bit length to avoid having to execute strlen(). 4853 // NOTE: 'StrLenPtr' is an 'unsigned char*' so that we load bytes as 4854 // unsigned integers. This is important to avoid integer overflow when 4855 // we cast them to 'unsigned'. 4856 const unsigned char *StrLenPtr = (const unsigned char*) Str - 2; 4857 unsigned StrLen = (((unsigned) StrLenPtr[0]) 4858 | (((unsigned) StrLenPtr[1]) << 8)) - 1; 4859 IdentifiersLoaded[ID] 4860 = &PP->getIdentifierTable().get(StringRef(Str, StrLen)); 4861 if (DeserializationListener) 4862 DeserializationListener->IdentifierRead(ID + 1, IdentifiersLoaded[ID]); 4863 } 4864 4865 return IdentifiersLoaded[ID]; 4866} 4867 4868IdentifierInfo *ASTReader::getLocalIdentifier(Module &M, unsigned LocalID) { 4869 return DecodeIdentifierInfo(getGlobalIdentifierID(M, LocalID)); 4870} 4871 4872IdentifierID ASTReader::getGlobalIdentifierID(Module &M, unsigned LocalID) { 4873 if (LocalID < NUM_PREDEF_IDENT_IDS) 4874 return LocalID; 4875 4876 ContinuousRangeMap<uint32_t, int, 2>::iterator I 4877 = M.IdentifierRemap.find(LocalID - NUM_PREDEF_IDENT_IDS); 4878 assert(I != M.IdentifierRemap.end() 4879 && "Invalid index into identifier index remap"); 4880 4881 return LocalID + I->second; 4882} 4883 4884bool ASTReader::ReadSLocEntry(int ID) { 4885 return ReadSLocEntryRecord(ID) != Success; 4886} 4887 4888Selector ASTReader::getLocalSelector(Module &M, unsigned LocalID) { 4889 return DecodeSelector(getGlobalSelectorID(M, LocalID)); 4890} 4891 4892Selector ASTReader::DecodeSelector(serialization::SelectorID ID) { 4893 if (ID == 0) 4894 return Selector(); 4895 4896 if (ID > SelectorsLoaded.size()) { 4897 Error("selector ID out of range in AST file"); 4898 return Selector(); 4899 } 4900 4901 if (SelectorsLoaded[ID - 1].getAsOpaquePtr() == 0) { 4902 // Load this selector from the selector table. 4903 GlobalSelectorMapType::iterator I = GlobalSelectorMap.find(ID); 4904 assert(I != GlobalSelectorMap.end() && "Corrupted global selector map"); 4905 Module &M = *I->second; 4906 ASTSelectorLookupTrait Trait(*this, M); 4907 unsigned Idx = ID - M.BaseSelectorID - NUM_PREDEF_SELECTOR_IDS; 4908 SelectorsLoaded[ID - 1] = 4909 Trait.ReadKey(M.SelectorLookupTableData + M.SelectorOffsets[Idx], 0); 4910 if (DeserializationListener) 4911 DeserializationListener->SelectorRead(ID, SelectorsLoaded[ID - 1]); 4912 } 4913 4914 return SelectorsLoaded[ID - 1]; 4915} 4916 4917Selector ASTReader::GetExternalSelector(serialization::SelectorID ID) { 4918 return DecodeSelector(ID); 4919} 4920 4921uint32_t ASTReader::GetNumExternalSelectors() { 4922 // ID 0 (the null selector) is considered an external selector. 4923 return getTotalNumSelectors() + 1; 4924} 4925 4926serialization::SelectorID 4927ASTReader::getGlobalSelectorID(Module &M, unsigned LocalID) const { 4928 if (LocalID < NUM_PREDEF_SELECTOR_IDS) 4929 return LocalID; 4930 4931 ContinuousRangeMap<uint32_t, int, 2>::iterator I 4932 = M.SelectorRemap.find(LocalID - NUM_PREDEF_SELECTOR_IDS); 4933 assert(I != M.SelectorRemap.end() 4934 && "Invalid index into identifier index remap"); 4935 4936 return LocalID + I->second; 4937} 4938 4939DeclarationName 4940ASTReader::ReadDeclarationName(Module &F, 4941 const RecordData &Record, unsigned &Idx) { 4942 DeclarationName::NameKind Kind = (DeclarationName::NameKind)Record[Idx++]; 4943 switch (Kind) { 4944 case DeclarationName::Identifier: 4945 return DeclarationName(GetIdentifierInfo(F, Record, Idx)); 4946 4947 case DeclarationName::ObjCZeroArgSelector: 4948 case DeclarationName::ObjCOneArgSelector: 4949 case DeclarationName::ObjCMultiArgSelector: 4950 return DeclarationName(ReadSelector(F, Record, Idx)); 4951 4952 case DeclarationName::CXXConstructorName: 4953 return Context->DeclarationNames.getCXXConstructorName( 4954 Context->getCanonicalType(readType(F, Record, Idx))); 4955 4956 case DeclarationName::CXXDestructorName: 4957 return Context->DeclarationNames.getCXXDestructorName( 4958 Context->getCanonicalType(readType(F, Record, Idx))); 4959 4960 case DeclarationName::CXXConversionFunctionName: 4961 return Context->DeclarationNames.getCXXConversionFunctionName( 4962 Context->getCanonicalType(readType(F, Record, Idx))); 4963 4964 case DeclarationName::CXXOperatorName: 4965 return Context->DeclarationNames.getCXXOperatorName( 4966 (OverloadedOperatorKind)Record[Idx++]); 4967 4968 case DeclarationName::CXXLiteralOperatorName: 4969 return Context->DeclarationNames.getCXXLiteralOperatorName( 4970 GetIdentifierInfo(F, Record, Idx)); 4971 4972 case DeclarationName::CXXUsingDirective: 4973 return DeclarationName::getUsingDirectiveName(); 4974 } 4975 4976 // Required to silence GCC warning 4977 return DeclarationName(); 4978} 4979 4980void ASTReader::ReadDeclarationNameLoc(Module &F, 4981 DeclarationNameLoc &DNLoc, 4982 DeclarationName Name, 4983 const RecordData &Record, unsigned &Idx) { 4984 switch (Name.getNameKind()) { 4985 case DeclarationName::CXXConstructorName: 4986 case DeclarationName::CXXDestructorName: 4987 case DeclarationName::CXXConversionFunctionName: 4988 DNLoc.NamedType.TInfo = GetTypeSourceInfo(F, Record, Idx); 4989 break; 4990 4991 case DeclarationName::CXXOperatorName: 4992 DNLoc.CXXOperatorName.BeginOpNameLoc 4993 = ReadSourceLocation(F, Record, Idx).getRawEncoding(); 4994 DNLoc.CXXOperatorName.EndOpNameLoc 4995 = ReadSourceLocation(F, Record, Idx).getRawEncoding(); 4996 break; 4997 4998 case DeclarationName::CXXLiteralOperatorName: 4999 DNLoc.CXXLiteralOperatorName.OpNameLoc 5000 = ReadSourceLocation(F, Record, Idx).getRawEncoding(); 5001 break; 5002 5003 case DeclarationName::Identifier: 5004 case DeclarationName::ObjCZeroArgSelector: 5005 case DeclarationName::ObjCOneArgSelector: 5006 case DeclarationName::ObjCMultiArgSelector: 5007 case DeclarationName::CXXUsingDirective: 5008 break; 5009 } 5010} 5011 5012void ASTReader::ReadDeclarationNameInfo(Module &F, 5013 DeclarationNameInfo &NameInfo, 5014 const RecordData &Record, unsigned &Idx) { 5015 NameInfo.setName(ReadDeclarationName(F, Record, Idx)); 5016 NameInfo.setLoc(ReadSourceLocation(F, Record, Idx)); 5017 DeclarationNameLoc DNLoc; 5018 ReadDeclarationNameLoc(F, DNLoc, NameInfo.getName(), Record, Idx); 5019 NameInfo.setInfo(DNLoc); 5020} 5021 5022void ASTReader::ReadQualifierInfo(Module &F, QualifierInfo &Info, 5023 const RecordData &Record, unsigned &Idx) { 5024 Info.QualifierLoc = ReadNestedNameSpecifierLoc(F, Record, Idx); 5025 unsigned NumTPLists = Record[Idx++]; 5026 Info.NumTemplParamLists = NumTPLists; 5027 if (NumTPLists) { 5028 Info.TemplParamLists = new (*Context) TemplateParameterList*[NumTPLists]; 5029 for (unsigned i=0; i != NumTPLists; ++i) 5030 Info.TemplParamLists[i] = ReadTemplateParameterList(F, Record, Idx); 5031 } 5032} 5033 5034TemplateName 5035ASTReader::ReadTemplateName(Module &F, const RecordData &Record, 5036 unsigned &Idx) { 5037 TemplateName::NameKind Kind = (TemplateName::NameKind)Record[Idx++]; 5038 switch (Kind) { 5039 case TemplateName::Template: 5040 return TemplateName(ReadDeclAs<TemplateDecl>(F, Record, Idx)); 5041 5042 case TemplateName::OverloadedTemplate: { 5043 unsigned size = Record[Idx++]; 5044 UnresolvedSet<8> Decls; 5045 while (size--) 5046 Decls.addDecl(ReadDeclAs<NamedDecl>(F, Record, Idx)); 5047 5048 return Context->getOverloadedTemplateName(Decls.begin(), Decls.end()); 5049 } 5050 5051 case TemplateName::QualifiedTemplate: { 5052 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(F, Record, Idx); 5053 bool hasTemplKeyword = Record[Idx++]; 5054 TemplateDecl *Template = ReadDeclAs<TemplateDecl>(F, Record, Idx); 5055 return Context->getQualifiedTemplateName(NNS, hasTemplKeyword, Template); 5056 } 5057 5058 case TemplateName::DependentTemplate: { 5059 NestedNameSpecifier *NNS = ReadNestedNameSpecifier(F, Record, Idx); 5060 if (Record[Idx++]) // isIdentifier 5061 return Context->getDependentTemplateName(NNS, 5062 GetIdentifierInfo(F, Record, 5063 Idx)); 5064 return Context->getDependentTemplateName(NNS, 5065 (OverloadedOperatorKind)Record[Idx++]); 5066 } 5067 5068 case TemplateName::SubstTemplateTemplateParm: { 5069 TemplateTemplateParmDecl *param 5070 = ReadDeclAs<TemplateTemplateParmDecl>(F, Record, Idx); 5071 if (!param) return TemplateName(); 5072 TemplateName replacement = ReadTemplateName(F, Record, Idx); 5073 return Context->getSubstTemplateTemplateParm(param, replacement); 5074 } 5075 5076 case TemplateName::SubstTemplateTemplateParmPack: { 5077 TemplateTemplateParmDecl *Param 5078 = ReadDeclAs<TemplateTemplateParmDecl>(F, Record, Idx); 5079 if (!Param) 5080 return TemplateName(); 5081 5082 TemplateArgument ArgPack = ReadTemplateArgument(F, Record, Idx); 5083 if (ArgPack.getKind() != TemplateArgument::Pack) 5084 return TemplateName(); 5085 5086 return Context->getSubstTemplateTemplateParmPack(Param, ArgPack); 5087 } 5088 } 5089 5090 assert(0 && "Unhandled template name kind!"); 5091 return TemplateName(); 5092} 5093 5094TemplateArgument 5095ASTReader::ReadTemplateArgument(Module &F, 5096 const RecordData &Record, unsigned &Idx) { 5097 TemplateArgument::ArgKind Kind = (TemplateArgument::ArgKind)Record[Idx++]; 5098 switch (Kind) { 5099 case TemplateArgument::Null: 5100 return TemplateArgument(); 5101 case TemplateArgument::Type: 5102 return TemplateArgument(readType(F, Record, Idx)); 5103 case TemplateArgument::Declaration: 5104 return TemplateArgument(ReadDecl(F, Record, Idx)); 5105 case TemplateArgument::Integral: { 5106 llvm::APSInt Value = ReadAPSInt(Record, Idx); 5107 QualType T = readType(F, Record, Idx); 5108 return TemplateArgument(Value, T); 5109 } 5110 case TemplateArgument::Template: 5111 return TemplateArgument(ReadTemplateName(F, Record, Idx)); 5112 case TemplateArgument::TemplateExpansion: { 5113 TemplateName Name = ReadTemplateName(F, Record, Idx); 5114 llvm::Optional<unsigned> NumTemplateExpansions; 5115 if (unsigned NumExpansions = Record[Idx++]) 5116 NumTemplateExpansions = NumExpansions - 1; 5117 return TemplateArgument(Name, NumTemplateExpansions); 5118 } 5119 case TemplateArgument::Expression: 5120 return TemplateArgument(ReadExpr(F)); 5121 case TemplateArgument::Pack: { 5122 unsigned NumArgs = Record[Idx++]; 5123 TemplateArgument *Args = new (*Context) TemplateArgument[NumArgs]; 5124 for (unsigned I = 0; I != NumArgs; ++I) 5125 Args[I] = ReadTemplateArgument(F, Record, Idx); 5126 return TemplateArgument(Args, NumArgs); 5127 } 5128 } 5129 5130 assert(0 && "Unhandled template argument kind!"); 5131 return TemplateArgument(); 5132} 5133 5134TemplateParameterList * 5135ASTReader::ReadTemplateParameterList(Module &F, 5136 const RecordData &Record, unsigned &Idx) { 5137 SourceLocation TemplateLoc = ReadSourceLocation(F, Record, Idx); 5138 SourceLocation LAngleLoc = ReadSourceLocation(F, Record, Idx); 5139 SourceLocation RAngleLoc = ReadSourceLocation(F, Record, Idx); 5140 5141 unsigned NumParams = Record[Idx++]; 5142 SmallVector<NamedDecl *, 16> Params; 5143 Params.reserve(NumParams); 5144 while (NumParams--) 5145 Params.push_back(ReadDeclAs<NamedDecl>(F, Record, Idx)); 5146 5147 TemplateParameterList* TemplateParams = 5148 TemplateParameterList::Create(*Context, TemplateLoc, LAngleLoc, 5149 Params.data(), Params.size(), RAngleLoc); 5150 return TemplateParams; 5151} 5152 5153void 5154ASTReader:: 5155ReadTemplateArgumentList(SmallVector<TemplateArgument, 8> &TemplArgs, 5156 Module &F, const RecordData &Record, 5157 unsigned &Idx) { 5158 unsigned NumTemplateArgs = Record[Idx++]; 5159 TemplArgs.reserve(NumTemplateArgs); 5160 while (NumTemplateArgs--) 5161 TemplArgs.push_back(ReadTemplateArgument(F, Record, Idx)); 5162} 5163 5164/// \brief Read a UnresolvedSet structure. 5165void ASTReader::ReadUnresolvedSet(Module &F, UnresolvedSetImpl &Set, 5166 const RecordData &Record, unsigned &Idx) { 5167 unsigned NumDecls = Record[Idx++]; 5168 while (NumDecls--) { 5169 NamedDecl *D = ReadDeclAs<NamedDecl>(F, Record, Idx); 5170 AccessSpecifier AS = (AccessSpecifier)Record[Idx++]; 5171 Set.addDecl(D, AS); 5172 } 5173} 5174 5175CXXBaseSpecifier 5176ASTReader::ReadCXXBaseSpecifier(Module &F, 5177 const RecordData &Record, unsigned &Idx) { 5178 bool isVirtual = static_cast<bool>(Record[Idx++]); 5179 bool isBaseOfClass = static_cast<bool>(Record[Idx++]); 5180 AccessSpecifier AS = static_cast<AccessSpecifier>(Record[Idx++]); 5181 bool inheritConstructors = static_cast<bool>(Record[Idx++]); 5182 TypeSourceInfo *TInfo = GetTypeSourceInfo(F, Record, Idx); 5183 SourceRange Range = ReadSourceRange(F, Record, Idx); 5184 SourceLocation EllipsisLoc = ReadSourceLocation(F, Record, Idx); 5185 CXXBaseSpecifier Result(Range, isVirtual, isBaseOfClass, AS, TInfo, 5186 EllipsisLoc); 5187 Result.setInheritConstructors(inheritConstructors); 5188 return Result; 5189} 5190 5191std::pair<CXXCtorInitializer **, unsigned> 5192ASTReader::ReadCXXCtorInitializers(Module &F, const RecordData &Record, 5193 unsigned &Idx) { 5194 CXXCtorInitializer **CtorInitializers = 0; 5195 unsigned NumInitializers = Record[Idx++]; 5196 if (NumInitializers) { 5197 ASTContext &C = *getContext(); 5198 5199 CtorInitializers 5200 = new (C) CXXCtorInitializer*[NumInitializers]; 5201 for (unsigned i=0; i != NumInitializers; ++i) { 5202 TypeSourceInfo *BaseClassInfo = 0; 5203 bool IsBaseVirtual = false; 5204 FieldDecl *Member = 0; 5205 IndirectFieldDecl *IndirectMember = 0; 5206 CXXConstructorDecl *Target = 0; 5207 5208 CtorInitializerType Type = (CtorInitializerType)Record[Idx++]; 5209 switch (Type) { 5210 case CTOR_INITIALIZER_BASE: 5211 BaseClassInfo = GetTypeSourceInfo(F, Record, Idx); 5212 IsBaseVirtual = Record[Idx++]; 5213 break; 5214 5215 case CTOR_INITIALIZER_DELEGATING: 5216 Target = ReadDeclAs<CXXConstructorDecl>(F, Record, Idx); 5217 break; 5218 5219 case CTOR_INITIALIZER_MEMBER: 5220 Member = ReadDeclAs<FieldDecl>(F, Record, Idx); 5221 break; 5222 5223 case CTOR_INITIALIZER_INDIRECT_MEMBER: 5224 IndirectMember = ReadDeclAs<IndirectFieldDecl>(F, Record, Idx); 5225 break; 5226 } 5227 5228 SourceLocation MemberOrEllipsisLoc = ReadSourceLocation(F, Record, Idx); 5229 Expr *Init = ReadExpr(F); 5230 SourceLocation LParenLoc = ReadSourceLocation(F, Record, Idx); 5231 SourceLocation RParenLoc = ReadSourceLocation(F, Record, Idx); 5232 bool IsWritten = Record[Idx++]; 5233 unsigned SourceOrderOrNumArrayIndices; 5234 SmallVector<VarDecl *, 8> Indices; 5235 if (IsWritten) { 5236 SourceOrderOrNumArrayIndices = Record[Idx++]; 5237 } else { 5238 SourceOrderOrNumArrayIndices = Record[Idx++]; 5239 Indices.reserve(SourceOrderOrNumArrayIndices); 5240 for (unsigned i=0; i != SourceOrderOrNumArrayIndices; ++i) 5241 Indices.push_back(ReadDeclAs<VarDecl>(F, Record, Idx)); 5242 } 5243 5244 CXXCtorInitializer *BOMInit; 5245 if (Type == CTOR_INITIALIZER_BASE) { 5246 BOMInit = new (C) CXXCtorInitializer(C, BaseClassInfo, IsBaseVirtual, 5247 LParenLoc, Init, RParenLoc, 5248 MemberOrEllipsisLoc); 5249 } else if (Type == CTOR_INITIALIZER_DELEGATING) { 5250 BOMInit = new (C) CXXCtorInitializer(C, MemberOrEllipsisLoc, LParenLoc, 5251 Target, Init, RParenLoc); 5252 } else if (IsWritten) { 5253 if (Member) 5254 BOMInit = new (C) CXXCtorInitializer(C, Member, MemberOrEllipsisLoc, 5255 LParenLoc, Init, RParenLoc); 5256 else 5257 BOMInit = new (C) CXXCtorInitializer(C, IndirectMember, 5258 MemberOrEllipsisLoc, LParenLoc, 5259 Init, RParenLoc); 5260 } else { 5261 BOMInit = CXXCtorInitializer::Create(C, Member, MemberOrEllipsisLoc, 5262 LParenLoc, Init, RParenLoc, 5263 Indices.data(), Indices.size()); 5264 } 5265 5266 if (IsWritten) 5267 BOMInit->setSourceOrder(SourceOrderOrNumArrayIndices); 5268 CtorInitializers[i] = BOMInit; 5269 } 5270 } 5271 5272 return std::make_pair(CtorInitializers, NumInitializers); 5273} 5274 5275NestedNameSpecifier * 5276ASTReader::ReadNestedNameSpecifier(Module &F, 5277 const RecordData &Record, unsigned &Idx) { 5278 unsigned N = Record[Idx++]; 5279 NestedNameSpecifier *NNS = 0, *Prev = 0; 5280 for (unsigned I = 0; I != N; ++I) { 5281 NestedNameSpecifier::SpecifierKind Kind 5282 = (NestedNameSpecifier::SpecifierKind)Record[Idx++]; 5283 switch (Kind) { 5284 case NestedNameSpecifier::Identifier: { 5285 IdentifierInfo *II = GetIdentifierInfo(F, Record, Idx); 5286 NNS = NestedNameSpecifier::Create(*Context, Prev, II); 5287 break; 5288 } 5289 5290 case NestedNameSpecifier::Namespace: { 5291 NamespaceDecl *NS = ReadDeclAs<NamespaceDecl>(F, Record, Idx); 5292 NNS = NestedNameSpecifier::Create(*Context, Prev, NS); 5293 break; 5294 } 5295 5296 case NestedNameSpecifier::NamespaceAlias: { 5297 NamespaceAliasDecl *Alias =ReadDeclAs<NamespaceAliasDecl>(F, Record, Idx); 5298 NNS = NestedNameSpecifier::Create(*Context, Prev, Alias); 5299 break; 5300 } 5301 5302 case NestedNameSpecifier::TypeSpec: 5303 case NestedNameSpecifier::TypeSpecWithTemplate: { 5304 const Type *T = readType(F, Record, Idx).getTypePtrOrNull(); 5305 if (!T) 5306 return 0; 5307 5308 bool Template = Record[Idx++]; 5309 NNS = NestedNameSpecifier::Create(*Context, Prev, Template, T); 5310 break; 5311 } 5312 5313 case NestedNameSpecifier::Global: { 5314 NNS = NestedNameSpecifier::GlobalSpecifier(*Context); 5315 // No associated value, and there can't be a prefix. 5316 break; 5317 } 5318 } 5319 Prev = NNS; 5320 } 5321 return NNS; 5322} 5323 5324NestedNameSpecifierLoc 5325ASTReader::ReadNestedNameSpecifierLoc(Module &F, const RecordData &Record, 5326 unsigned &Idx) { 5327 unsigned N = Record[Idx++]; 5328 NestedNameSpecifierLocBuilder Builder; 5329 for (unsigned I = 0; I != N; ++I) { 5330 NestedNameSpecifier::SpecifierKind Kind 5331 = (NestedNameSpecifier::SpecifierKind)Record[Idx++]; 5332 switch (Kind) { 5333 case NestedNameSpecifier::Identifier: { 5334 IdentifierInfo *II = GetIdentifierInfo(F, Record, Idx); 5335 SourceRange Range = ReadSourceRange(F, Record, Idx); 5336 Builder.Extend(*Context, II, Range.getBegin(), Range.getEnd()); 5337 break; 5338 } 5339 5340 case NestedNameSpecifier::Namespace: { 5341 NamespaceDecl *NS = ReadDeclAs<NamespaceDecl>(F, Record, Idx); 5342 SourceRange Range = ReadSourceRange(F, Record, Idx); 5343 Builder.Extend(*Context, NS, Range.getBegin(), Range.getEnd()); 5344 break; 5345 } 5346 5347 case NestedNameSpecifier::NamespaceAlias: { 5348 NamespaceAliasDecl *Alias =ReadDeclAs<NamespaceAliasDecl>(F, Record, Idx); 5349 SourceRange Range = ReadSourceRange(F, Record, Idx); 5350 Builder.Extend(*Context, Alias, Range.getBegin(), Range.getEnd()); 5351 break; 5352 } 5353 5354 case NestedNameSpecifier::TypeSpec: 5355 case NestedNameSpecifier::TypeSpecWithTemplate: { 5356 bool Template = Record[Idx++]; 5357 TypeSourceInfo *T = GetTypeSourceInfo(F, Record, Idx); 5358 if (!T) 5359 return NestedNameSpecifierLoc(); 5360 SourceLocation ColonColonLoc = ReadSourceLocation(F, Record, Idx); 5361 5362 // FIXME: 'template' keyword location not saved anywhere, so we fake it. 5363 Builder.Extend(*Context, 5364 Template? T->getTypeLoc().getBeginLoc() : SourceLocation(), 5365 T->getTypeLoc(), ColonColonLoc); 5366 break; 5367 } 5368 5369 case NestedNameSpecifier::Global: { 5370 SourceLocation ColonColonLoc = ReadSourceLocation(F, Record, Idx); 5371 Builder.MakeGlobal(*Context, ColonColonLoc); 5372 break; 5373 } 5374 } 5375 } 5376 5377 return Builder.getWithLocInContext(*Context); 5378} 5379 5380SourceRange 5381ASTReader::ReadSourceRange(Module &F, const RecordData &Record, 5382 unsigned &Idx) { 5383 SourceLocation beg = ReadSourceLocation(F, Record, Idx); 5384 SourceLocation end = ReadSourceLocation(F, Record, Idx); 5385 return SourceRange(beg, end); 5386} 5387 5388/// \brief Read an integral value 5389llvm::APInt ASTReader::ReadAPInt(const RecordData &Record, unsigned &Idx) { 5390 unsigned BitWidth = Record[Idx++]; 5391 unsigned NumWords = llvm::APInt::getNumWords(BitWidth); 5392 llvm::APInt Result(BitWidth, NumWords, &Record[Idx]); 5393 Idx += NumWords; 5394 return Result; 5395} 5396 5397/// \brief Read a signed integral value 5398llvm::APSInt ASTReader::ReadAPSInt(const RecordData &Record, unsigned &Idx) { 5399 bool isUnsigned = Record[Idx++]; 5400 return llvm::APSInt(ReadAPInt(Record, Idx), isUnsigned); 5401} 5402 5403/// \brief Read a floating-point value 5404llvm::APFloat ASTReader::ReadAPFloat(const RecordData &Record, unsigned &Idx) { 5405 return llvm::APFloat(ReadAPInt(Record, Idx)); 5406} 5407 5408// \brief Read a string 5409std::string ASTReader::ReadString(const RecordData &Record, unsigned &Idx) { 5410 unsigned Len = Record[Idx++]; 5411 std::string Result(Record.data() + Idx, Record.data() + Idx + Len); 5412 Idx += Len; 5413 return Result; 5414} 5415 5416VersionTuple ASTReader::ReadVersionTuple(const RecordData &Record, 5417 unsigned &Idx) { 5418 unsigned Major = Record[Idx++]; 5419 unsigned Minor = Record[Idx++]; 5420 unsigned Subminor = Record[Idx++]; 5421 if (Minor == 0) 5422 return VersionTuple(Major); 5423 if (Subminor == 0) 5424 return VersionTuple(Major, Minor - 1); 5425 return VersionTuple(Major, Minor - 1, Subminor - 1); 5426} 5427 5428CXXTemporary *ASTReader::ReadCXXTemporary(Module &F, 5429 const RecordData &Record, 5430 unsigned &Idx) { 5431 CXXDestructorDecl *Decl = ReadDeclAs<CXXDestructorDecl>(F, Record, Idx); 5432 return CXXTemporary::Create(*Context, Decl); 5433} 5434 5435DiagnosticBuilder ASTReader::Diag(unsigned DiagID) { 5436 return Diag(SourceLocation(), DiagID); 5437} 5438 5439DiagnosticBuilder ASTReader::Diag(SourceLocation Loc, unsigned DiagID) { 5440 return Diags.Report(Loc, DiagID); 5441} 5442 5443/// \brief Retrieve the identifier table associated with the 5444/// preprocessor. 5445IdentifierTable &ASTReader::getIdentifierTable() { 5446 assert(PP && "Forgot to set Preprocessor ?"); 5447 return PP->getIdentifierTable(); 5448} 5449 5450/// \brief Record that the given ID maps to the given switch-case 5451/// statement. 5452void ASTReader::RecordSwitchCaseID(SwitchCase *SC, unsigned ID) { 5453 assert(SwitchCaseStmts[ID] == 0 && "Already have a SwitchCase with this ID"); 5454 SwitchCaseStmts[ID] = SC; 5455} 5456 5457/// \brief Retrieve the switch-case statement with the given ID. 5458SwitchCase *ASTReader::getSwitchCaseWithID(unsigned ID) { 5459 assert(SwitchCaseStmts[ID] != 0 && "No SwitchCase with this ID"); 5460 return SwitchCaseStmts[ID]; 5461} 5462 5463void ASTReader::ClearSwitchCaseIDs() { 5464 SwitchCaseStmts.clear(); 5465} 5466 5467void ASTReader::FinishedDeserializing() { 5468 assert(NumCurrentElementsDeserializing && 5469 "FinishedDeserializing not paired with StartedDeserializing"); 5470 if (NumCurrentElementsDeserializing == 1) { 5471 // If any identifiers with corresponding top-level declarations have 5472 // been loaded, load those declarations now. 5473 while (!PendingIdentifierInfos.empty()) { 5474 SetGloballyVisibleDecls(PendingIdentifierInfos.front().II, 5475 PendingIdentifierInfos.front().DeclIDs, true); 5476 PendingIdentifierInfos.pop_front(); 5477 } 5478 5479 // Ready to load previous declarations of Decls that were delayed. 5480 while (!PendingPreviousDecls.empty()) { 5481 loadAndAttachPreviousDecl(PendingPreviousDecls.front().first, 5482 PendingPreviousDecls.front().second); 5483 PendingPreviousDecls.pop_front(); 5484 } 5485 5486 // We are not in recursive loading, so it's safe to pass the "interesting" 5487 // decls to the consumer. 5488 if (Consumer) 5489 PassInterestingDeclsToConsumer(); 5490 5491 assert(PendingForwardRefs.size() == 0 && 5492 "Some forward refs did not get linked to the definition!"); 5493 } 5494 --NumCurrentElementsDeserializing; 5495} 5496 5497ASTReader::ASTReader(Preprocessor &PP, ASTContext *Context, 5498 StringRef isysroot, bool DisableValidation, 5499 bool DisableStatCache) 5500 : Listener(new PCHValidator(PP, *this)), DeserializationListener(0), 5501 SourceMgr(PP.getSourceManager()), FileMgr(PP.getFileManager()), 5502 Diags(PP.getDiagnostics()), SemaObj(0), PP(&PP), Context(Context), 5503 Consumer(0), ModuleMgr(FileMgr.getFileSystemOptions()), 5504 RelocatablePCH(false), isysroot(isysroot), 5505 DisableValidation(DisableValidation), 5506 DisableStatCache(DisableStatCache), NumStatHits(0), NumStatMisses(0), 5507 NumSLocEntriesRead(0), TotalNumSLocEntries(0), 5508 NumStatementsRead(0), TotalNumStatements(0), NumMacrosRead(0), 5509 TotalNumMacros(0), NumSelectorsRead(0), NumMethodPoolEntriesRead(0), 5510 NumMethodPoolMisses(0), TotalNumMethodPoolEntries(0), 5511 NumLexicalDeclContextsRead(0), TotalLexicalDeclContexts(0), 5512 NumVisibleDeclContextsRead(0), TotalVisibleDeclContexts(0), 5513 TotalModulesSizeInBits(0), NumCurrentElementsDeserializing(0), 5514 NumCXXBaseSpecifiersLoaded(0) 5515{ 5516 SourceMgr.setExternalSLocEntrySource(this); 5517} 5518 5519ASTReader::ASTReader(SourceManager &SourceMgr, FileManager &FileMgr, 5520 Diagnostic &Diags, StringRef isysroot, 5521 bool DisableValidation, bool DisableStatCache) 5522 : DeserializationListener(0), SourceMgr(SourceMgr), FileMgr(FileMgr), 5523 Diags(Diags), SemaObj(0), PP(0), Context(0), 5524 Consumer(0), ModuleMgr(FileMgr.getFileSystemOptions()), 5525 RelocatablePCH(false), isysroot(isysroot), 5526 DisableValidation(DisableValidation), DisableStatCache(DisableStatCache), 5527 NumStatHits(0), NumStatMisses(0), NumSLocEntriesRead(0), 5528 TotalNumSLocEntries(0), NumStatementsRead(0), 5529 TotalNumStatements(0), NumMacrosRead(0), TotalNumMacros(0), 5530 NumSelectorsRead(0), NumMethodPoolEntriesRead(0), NumMethodPoolMisses(0), 5531 TotalNumMethodPoolEntries(0), NumLexicalDeclContextsRead(0), 5532 TotalLexicalDeclContexts(0), NumVisibleDeclContextsRead(0), 5533 TotalVisibleDeclContexts(0), TotalModulesSizeInBits(0), 5534 NumCurrentElementsDeserializing(0), NumCXXBaseSpecifiersLoaded(0) 5535{ 5536 SourceMgr.setExternalSLocEntrySource(this); 5537} 5538 5539ASTReader::~ASTReader() { 5540 // Delete all visible decl lookup tables 5541 for (DeclContextOffsetsMap::iterator I = DeclContextOffsets.begin(), 5542 E = DeclContextOffsets.end(); 5543 I != E; ++I) { 5544 for (DeclContextInfos::iterator J = I->second.begin(), F = I->second.end(); 5545 J != F; ++J) { 5546 if (J->NameLookupTableData) 5547 delete static_cast<ASTDeclContextNameLookupTable*>( 5548 J->NameLookupTableData); 5549 } 5550 } 5551 for (DeclContextVisibleUpdatesPending::iterator 5552 I = PendingVisibleUpdates.begin(), 5553 E = PendingVisibleUpdates.end(); 5554 I != E; ++I) { 5555 for (DeclContextVisibleUpdates::iterator J = I->second.begin(), 5556 F = I->second.end(); 5557 J != F; ++J) 5558 delete static_cast<ASTDeclContextNameLookupTable*>(J->first); 5559 } 5560} 5561 5562Module::Module(ModuleKind Kind) 5563 : Kind(Kind), SizeInBits(0), LocalNumSLocEntries(0), SLocEntryBaseID(0), 5564 SLocEntryBaseOffset(0), SLocEntryOffsets(0), 5565 SLocFileOffsets(0), LocalNumIdentifiers(0), 5566 IdentifierOffsets(0), BaseIdentifierID(0), IdentifierTableData(0), 5567 IdentifierLookupTable(0), BasePreprocessedEntityID(0), 5568 LocalNumMacroDefinitions(0), MacroDefinitionOffsets(0), 5569 BaseMacroDefinitionID(0), LocalNumHeaderFileInfos(0), 5570 HeaderFileInfoTableData(0), HeaderFileInfoTable(0), 5571 HeaderFileFrameworkStrings(0), 5572 LocalNumSelectors(0), SelectorOffsets(0), BaseSelectorID(0), 5573 SelectorLookupTableData(0), SelectorLookupTable(0), LocalNumDecls(0), 5574 DeclOffsets(0), BaseDeclID(0), 5575 LocalNumCXXBaseSpecifiers(0), CXXBaseSpecifiersOffsets(0), 5576 LocalNumTypes(0), TypeOffsets(0), BaseTypeIndex(0), StatCache(0), 5577 NumPreallocatedPreprocessingEntities(0) 5578{} 5579 5580Module::~Module() { 5581 delete static_cast<ASTIdentifierLookupTable *>(IdentifierLookupTable); 5582 delete static_cast<HeaderFileInfoLookupTable *>(HeaderFileInfoTable); 5583 delete static_cast<ASTSelectorLookupTable *>(SelectorLookupTable); 5584} 5585 5586template<typename Key, typename Offset, unsigned InitialCapacity> 5587static void 5588dumpLocalRemap(StringRef Name, 5589 const ContinuousRangeMap<Key, Offset, InitialCapacity> &Map) { 5590 if (Map.begin() == Map.end()) 5591 return; 5592 5593 typedef ContinuousRangeMap<Key, Offset, InitialCapacity> MapType; 5594 llvm::errs() << " " << Name << ":\n"; 5595 for (typename MapType::const_iterator I = Map.begin(), IEnd = Map.end(); 5596 I != IEnd; ++I) { 5597 llvm::errs() << " " << I->first << " -> " << I->second 5598 << "\n"; 5599 } 5600} 5601 5602void Module::dump() { 5603 llvm::errs() << "\nModule: " << FileName << "\n"; 5604 if (!Imports.empty()) { 5605 llvm::errs() << " Imports: "; 5606 for (unsigned I = 0, N = Imports.size(); I != N; ++I) { 5607 if (I) 5608 llvm::errs() << ", "; 5609 llvm::errs() << Imports[I]->FileName; 5610 } 5611 llvm::errs() << "\n"; 5612 } 5613 5614 // Remapping tables. 5615 llvm::errs() << " Base source location offset: " << SLocEntryBaseOffset 5616 << '\n'; 5617 dumpLocalRemap("Source location offset local -> global map", SLocRemap); 5618 5619 llvm::errs() << " Base identifier ID: " << BaseIdentifierID << '\n' 5620 << " Number of identifiers: " << LocalNumIdentifiers << '\n'; 5621 dumpLocalRemap("Identifier ID local -> global map", IdentifierRemap); 5622 5623 llvm::errs() << " Base selector ID: " << BaseSelectorID << '\n' 5624 << " Number of selectors: " << LocalNumSelectors << '\n'; 5625 dumpLocalRemap("Selector ID local -> global map", SelectorRemap); 5626 5627 llvm::errs() << " Base preprocessed entity ID: " << BasePreprocessedEntityID 5628 << '\n' 5629 << "Number of preprocessed entities: " 5630 << NumPreallocatedPreprocessingEntities << '\n'; 5631 dumpLocalRemap("Preprocessed entity ID local -> global map", 5632 PreprocessedEntityRemap); 5633 5634 llvm::errs() << " Base macro definition ID: " << BaseMacroDefinitionID 5635 << '\n' 5636 << " Number of macro definitions: " << LocalNumMacroDefinitions 5637 << '\n'; 5638 dumpLocalRemap("Macro definition ID local -> global map", 5639 MacroDefinitionRemap); 5640 5641 llvm::errs() << " Base type index: " << BaseTypeIndex << '\n' 5642 << " Number of types: " << LocalNumTypes << '\n'; 5643 dumpLocalRemap("Type index local -> global map", TypeRemap); 5644 5645 llvm::errs() << " Base decl ID: " << BaseDeclID << '\n' 5646 << " Number of decls: " << LocalNumDecls << '\n'; 5647 dumpLocalRemap("Decl ID local -> global map", DeclRemap); 5648} 5649 5650Module *ModuleManager::lookup(StringRef Name) { 5651 const FileEntry *Entry = FileMgr.getFile(Name); 5652 return Modules[Entry]; 5653} 5654 5655llvm::MemoryBuffer *ModuleManager::lookupBuffer(StringRef Name) { 5656 const FileEntry *Entry = FileMgr.getFile(Name); 5657 return InMemoryBuffers[Entry]; 5658} 5659 5660/// \brief Creates a new module and adds it to the list of known modules 5661Module &ModuleManager::addModule(StringRef FileName, ModuleKind Type) { 5662 Module *Prev = !size() ? 0 : &getLastModule(); 5663 Module *Current = new Module(Type); 5664 5665 Current->FileName = FileName.str(); 5666 5667 Chain.push_back(Current); 5668 const FileEntry *Entry = FileMgr.getFile(FileName); 5669 Modules[Entry] = Current; 5670 5671 if (Prev) { 5672 Current->ImportedBy.insert(Prev); 5673 Prev->Imports.insert(Current); 5674 } 5675 5676 return *Current; 5677} 5678 5679void ModuleManager::addInMemoryBuffer(StringRef FileName, 5680 llvm::MemoryBuffer *Buffer) { 5681 5682 const FileEntry *Entry = FileMgr.getVirtualFile(FileName, 5683 Buffer->getBufferSize(), 0); 5684 InMemoryBuffers[Entry] = Buffer; 5685} 5686/// \brief Exports the list of loaded modules with their corresponding names 5687void ModuleManager::exportLookup(SmallVector<ModuleOffset, 16> &Target) { 5688 Target.reserve(size()); 5689 for (ModuleConstIterator I = Chain.begin(), E = Chain.end(); 5690 I != E; ++I) { 5691 Target.push_back(ModuleOffset((*I)->SLocEntryBaseOffset, 5692 (*I)->FileName)); 5693 } 5694 std::sort(Target.begin(), Target.end()); 5695} 5696 5697ModuleManager::ModuleManager(const FileSystemOptions &FSO) : FileMgr(FSO) { } 5698 5699ModuleManager::~ModuleManager() { 5700 for (unsigned i = 0, e = Chain.size(); i != e; ++i) 5701 delete Chain[e - i - 1]; 5702} 5703