| //===--- PCHReader.cpp - Precompiled Headers Reader -------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file defines the PCHReader class, which reads a precompiled header. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "clang/Frontend/PCHReader.h" |
| #include "clang/Frontend/FrontendDiagnostic.h" |
| #include "clang/Frontend/PCHDeserializationListener.h" |
| #include "clang/Frontend/Utils.h" |
| #include "../Sema/Sema.h" // FIXME: move Sema headers elsewhere |
| #include "clang/AST/ASTConsumer.h" |
| #include "clang/AST/ASTContext.h" |
| #include "clang/AST/Expr.h" |
| #include "clang/AST/Type.h" |
| #include "clang/AST/TypeLocVisitor.h" |
| #include "clang/Lex/MacroInfo.h" |
| #include "clang/Lex/PreprocessingRecord.h" |
| #include "clang/Lex/Preprocessor.h" |
| #include "clang/Lex/HeaderSearch.h" |
| #include "clang/Basic/OnDiskHashTable.h" |
| #include "clang/Basic/SourceManager.h" |
| #include "clang/Basic/SourceManagerInternals.h" |
| #include "clang/Basic/FileManager.h" |
| #include "clang/Basic/TargetInfo.h" |
| #include "clang/Basic/Version.h" |
| #include "llvm/ADT/StringExtras.h" |
| #include "llvm/Bitcode/BitstreamReader.h" |
| #include "llvm/Support/MemoryBuffer.h" |
| #include "llvm/Support/ErrorHandling.h" |
| #include "llvm/System/Path.h" |
| #include <algorithm> |
| #include <iterator> |
| #include <cstdio> |
| #include <sys/stat.h> |
| using namespace clang; |
| |
| //===----------------------------------------------------------------------===// |
| // PCH reader validator implementation |
| //===----------------------------------------------------------------------===// |
| |
| PCHReaderListener::~PCHReaderListener() {} |
| |
| bool |
| PCHValidator::ReadLanguageOptions(const LangOptions &LangOpts) { |
| const LangOptions &PPLangOpts = PP.getLangOptions(); |
| #define PARSE_LANGOPT_BENIGN(Option) |
| #define PARSE_LANGOPT_IMPORTANT(Option, DiagID) \ |
| if (PPLangOpts.Option != LangOpts.Option) { \ |
| Reader.Diag(DiagID) << LangOpts.Option << PPLangOpts.Option; \ |
| return true; \ |
| } |
| |
| PARSE_LANGOPT_BENIGN(Trigraphs); |
| PARSE_LANGOPT_BENIGN(BCPLComment); |
| PARSE_LANGOPT_BENIGN(DollarIdents); |
| PARSE_LANGOPT_BENIGN(AsmPreprocessor); |
| PARSE_LANGOPT_IMPORTANT(GNUMode, diag::warn_pch_gnu_extensions); |
| PARSE_LANGOPT_IMPORTANT(GNUKeywords, diag::warn_pch_gnu_keywords); |
| PARSE_LANGOPT_BENIGN(ImplicitInt); |
| PARSE_LANGOPT_BENIGN(Digraphs); |
| PARSE_LANGOPT_BENIGN(HexFloats); |
| PARSE_LANGOPT_IMPORTANT(C99, diag::warn_pch_c99); |
| PARSE_LANGOPT_IMPORTANT(Microsoft, diag::warn_pch_microsoft_extensions); |
| PARSE_LANGOPT_IMPORTANT(CPlusPlus, diag::warn_pch_cplusplus); |
| PARSE_LANGOPT_IMPORTANT(CPlusPlus0x, diag::warn_pch_cplusplus0x); |
| PARSE_LANGOPT_BENIGN(CXXOperatorName); |
| PARSE_LANGOPT_IMPORTANT(ObjC1, diag::warn_pch_objective_c); |
| PARSE_LANGOPT_IMPORTANT(ObjC2, diag::warn_pch_objective_c2); |
| PARSE_LANGOPT_IMPORTANT(ObjCNonFragileABI, diag::warn_pch_nonfragile_abi); |
| PARSE_LANGOPT_IMPORTANT(ObjCNonFragileABI2, diag::warn_pch_nonfragile_abi2); |
| PARSE_LANGOPT_IMPORTANT(NoConstantCFStrings, |
| diag::warn_pch_no_constant_cfstrings); |
| PARSE_LANGOPT_BENIGN(PascalStrings); |
| PARSE_LANGOPT_BENIGN(WritableStrings); |
| PARSE_LANGOPT_IMPORTANT(LaxVectorConversions, |
| diag::warn_pch_lax_vector_conversions); |
| PARSE_LANGOPT_IMPORTANT(AltiVec, diag::warn_pch_altivec); |
| PARSE_LANGOPT_IMPORTANT(Exceptions, diag::warn_pch_exceptions); |
| PARSE_LANGOPT_IMPORTANT(SjLjExceptions, diag::warn_pch_sjlj_exceptions); |
| PARSE_LANGOPT_IMPORTANT(NeXTRuntime, diag::warn_pch_objc_runtime); |
| PARSE_LANGOPT_IMPORTANT(Freestanding, diag::warn_pch_freestanding); |
| PARSE_LANGOPT_IMPORTANT(NoBuiltin, diag::warn_pch_builtins); |
| PARSE_LANGOPT_IMPORTANT(ThreadsafeStatics, |
| diag::warn_pch_thread_safe_statics); |
| PARSE_LANGOPT_IMPORTANT(POSIXThreads, diag::warn_pch_posix_threads); |
| PARSE_LANGOPT_IMPORTANT(Blocks, diag::warn_pch_blocks); |
| PARSE_LANGOPT_BENIGN(EmitAllDecls); |
| PARSE_LANGOPT_IMPORTANT(MathErrno, diag::warn_pch_math_errno); |
| PARSE_LANGOPT_BENIGN(getSignedOverflowBehavior()); |
| PARSE_LANGOPT_IMPORTANT(HeinousExtensions, |
| diag::warn_pch_heinous_extensions); |
| // FIXME: Most of the options below are benign if the macro wasn't |
| // used. Unfortunately, this means that a PCH compiled without |
| // optimization can't be used with optimization turned on, even |
| // though the only thing that changes is whether __OPTIMIZE__ was |
| // defined... but if __OPTIMIZE__ never showed up in the header, it |
| // doesn't matter. We could consider making this some special kind |
| // of check. |
| PARSE_LANGOPT_IMPORTANT(Optimize, diag::warn_pch_optimize); |
| PARSE_LANGOPT_IMPORTANT(OptimizeSize, diag::warn_pch_optimize_size); |
| PARSE_LANGOPT_IMPORTANT(Static, diag::warn_pch_static); |
| PARSE_LANGOPT_IMPORTANT(PICLevel, diag::warn_pch_pic_level); |
| PARSE_LANGOPT_IMPORTANT(GNUInline, diag::warn_pch_gnu_inline); |
| PARSE_LANGOPT_IMPORTANT(NoInline, diag::warn_pch_no_inline); |
| PARSE_LANGOPT_IMPORTANT(AccessControl, diag::warn_pch_access_control); |
| PARSE_LANGOPT_IMPORTANT(CharIsSigned, diag::warn_pch_char_signed); |
| PARSE_LANGOPT_IMPORTANT(ShortWChar, diag::warn_pch_short_wchar); |
| if ((PPLangOpts.getGCMode() != 0) != (LangOpts.getGCMode() != 0)) { |
| Reader.Diag(diag::warn_pch_gc_mode) |
| << LangOpts.getGCMode() << PPLangOpts.getGCMode(); |
| return true; |
| } |
| PARSE_LANGOPT_BENIGN(getVisibilityMode()); |
| PARSE_LANGOPT_IMPORTANT(getStackProtectorMode(), |
| diag::warn_pch_stack_protector); |
| PARSE_LANGOPT_BENIGN(InstantiationDepth); |
| PARSE_LANGOPT_IMPORTANT(OpenCL, diag::warn_pch_opencl); |
| PARSE_LANGOPT_BENIGN(CatchUndefined); |
| PARSE_LANGOPT_IMPORTANT(ElideConstructors, diag::warn_pch_elide_constructors); |
| PARSE_LANGOPT_BENIGN(SpellChecking); |
| #undef PARSE_LANGOPT_IMPORTANT |
| #undef PARSE_LANGOPT_BENIGN |
| |
| return false; |
| } |
| |
| bool PCHValidator::ReadTargetTriple(llvm::StringRef Triple) { |
| if (Triple == PP.getTargetInfo().getTriple().str()) |
| return false; |
| |
| Reader.Diag(diag::warn_pch_target_triple) |
| << Triple << PP.getTargetInfo().getTriple().str(); |
| return true; |
| } |
| |
| struct EmptyStringRef { |
| bool operator ()(llvm::StringRef r) const { return r.empty(); } |
| }; |
| struct EmptyBlock { |
| bool operator ()(const PCHPredefinesBlock &r) const { return r.Data.empty(); } |
| }; |
| |
| static bool EqualConcatenations(llvm::SmallVector<llvm::StringRef, 2> L, |
| PCHPredefinesBlocks R) { |
| // First, sum up the lengths. |
| unsigned LL = 0, RL = 0; |
| for (unsigned I = 0, N = L.size(); I != N; ++I) { |
| LL += L[I].size(); |
| } |
| for (unsigned I = 0, N = R.size(); I != N; ++I) { |
| RL += R[I].Data.size(); |
| } |
| if (LL != RL) |
| return false; |
| if (LL == 0 && RL == 0) |
| return true; |
| |
| // Kick out empty parts, they confuse the algorithm below. |
| L.erase(std::remove_if(L.begin(), L.end(), EmptyStringRef()), L.end()); |
| R.erase(std::remove_if(R.begin(), R.end(), EmptyBlock()), R.end()); |
| |
| // Do it the hard way. At this point, both vectors must be non-empty. |
| llvm::StringRef LR = L[0], RR = R[0].Data; |
| unsigned LI = 0, RI = 0, LN = L.size(), RN = R.size(); |
| (void) RN; |
| for (;;) { |
| // Compare the current pieces. |
| if (LR.size() == RR.size()) { |
| // If they're the same length, it's pretty easy. |
| if (LR != RR) |
| return false; |
| // Both pieces are done, advance. |
| ++LI; |
| ++RI; |
| // If either string is done, they're both done, since they're the same |
| // length. |
| if (LI == LN) { |
| assert(RI == RN && "Strings not the same length after all?"); |
| return true; |
| } |
| LR = L[LI]; |
| RR = R[RI].Data; |
| } else if (LR.size() < RR.size()) { |
| // Right piece is longer. |
| if (!RR.startswith(LR)) |
| return false; |
| ++LI; |
| assert(LI != LN && "Strings not the same length after all?"); |
| RR = RR.substr(LR.size()); |
| LR = L[LI]; |
| } else { |
| // Left piece is longer. |
| if (!LR.startswith(RR)) |
| return false; |
| ++RI; |
| assert(RI != RN && "Strings not the same length after all?"); |
| LR = LR.substr(RR.size()); |
| RR = R[RI].Data; |
| } |
| } |
| } |
| |
| static std::pair<FileID, llvm::StringRef::size_type> |
| FindMacro(const PCHPredefinesBlocks &Buffers, llvm::StringRef MacroDef) { |
| std::pair<FileID, llvm::StringRef::size_type> Res; |
| for (unsigned I = 0, N = Buffers.size(); I != N; ++I) { |
| Res.second = Buffers[I].Data.find(MacroDef); |
| if (Res.second != llvm::StringRef::npos) { |
| Res.first = Buffers[I].BufferID; |
| break; |
| } |
| } |
| return Res; |
| } |
| |
| bool PCHValidator::ReadPredefinesBuffer(const PCHPredefinesBlocks &Buffers, |
| llvm::StringRef OriginalFileName, |
| std::string &SuggestedPredefines) { |
| // We are in the context of an implicit include, so the predefines buffer will |
| // have a #include entry for the PCH file itself (as normalized by the |
| // preprocessor initialization). Find it and skip over it in the checking |
| // below. |
| llvm::SmallString<256> PCHInclude; |
| PCHInclude += "#include \""; |
| PCHInclude += NormalizeDashIncludePath(OriginalFileName); |
| PCHInclude += "\"\n"; |
| std::pair<llvm::StringRef,llvm::StringRef> Split = |
| llvm::StringRef(PP.getPredefines()).split(PCHInclude.str()); |
| llvm::StringRef Left = Split.first, Right = Split.second; |
| if (Left == PP.getPredefines()) { |
| Error("Missing PCH include entry!"); |
| return true; |
| } |
| |
| // If the concatenation of all the PCH buffers is equal to the adjusted |
| // command line, we're done. |
| // We build a SmallVector of the command line here, because we'll eventually |
| // need to support an arbitrary amount of pieces anyway (when we have chained |
| // PCH reading). |
| llvm::SmallVector<llvm::StringRef, 2> CommandLine; |
| CommandLine.push_back(Left); |
| CommandLine.push_back(Right); |
| if (EqualConcatenations(CommandLine, Buffers)) |
| return false; |
| |
| SourceManager &SourceMgr = PP.getSourceManager(); |
| |
| // The predefines buffers are different. Determine what the differences are, |
| // and whether they require us to reject the PCH file. |
| llvm::SmallVector<llvm::StringRef, 8> PCHLines; |
| for (unsigned I = 0, N = Buffers.size(); I != N; ++I) |
| Buffers[I].Data.split(PCHLines, "\n", /*MaxSplit=*/-1, /*KeepEmpty=*/false); |
| |
| llvm::SmallVector<llvm::StringRef, 8> CmdLineLines; |
| Left.split(CmdLineLines, "\n", /*MaxSplit=*/-1, /*KeepEmpty=*/false); |
| Right.split(CmdLineLines, "\n", /*MaxSplit=*/-1, /*KeepEmpty=*/false); |
| |
| // Sort both sets of predefined buffer lines, since we allow some extra |
| // definitions and they may appear at any point in the output. |
| std::sort(CmdLineLines.begin(), CmdLineLines.end()); |
| std::sort(PCHLines.begin(), PCHLines.end()); |
| |
| // Determine which predefines that were used to build the PCH file are missing |
| // from the command line. |
| std::vector<llvm::StringRef> MissingPredefines; |
| std::set_difference(PCHLines.begin(), PCHLines.end(), |
| CmdLineLines.begin(), CmdLineLines.end(), |
| std::back_inserter(MissingPredefines)); |
| |
| bool MissingDefines = false; |
| bool ConflictingDefines = false; |
| for (unsigned I = 0, N = MissingPredefines.size(); I != N; ++I) { |
| llvm::StringRef Missing = MissingPredefines[I]; |
| if (!Missing.startswith("#define ")) { |
| Reader.Diag(diag::warn_pch_compiler_options_mismatch); |
| return true; |
| } |
| |
| // This is a macro definition. Determine the name of the macro we're |
| // defining. |
| std::string::size_type StartOfMacroName = strlen("#define "); |
| std::string::size_type EndOfMacroName |
| = Missing.find_first_of("( \n\r", StartOfMacroName); |
| assert(EndOfMacroName != std::string::npos && |
| "Couldn't find the end of the macro name"); |
| llvm::StringRef MacroName = Missing.slice(StartOfMacroName, EndOfMacroName); |
| |
| // Determine whether this macro was given a different definition on the |
| // command line. |
| std::string MacroDefStart = "#define " + MacroName.str(); |
| std::string::size_type MacroDefLen = MacroDefStart.size(); |
| llvm::SmallVector<llvm::StringRef, 8>::iterator ConflictPos |
| = std::lower_bound(CmdLineLines.begin(), CmdLineLines.end(), |
| MacroDefStart); |
| for (; ConflictPos != CmdLineLines.end(); ++ConflictPos) { |
| if (!ConflictPos->startswith(MacroDefStart)) { |
| // Different macro; we're done. |
| ConflictPos = CmdLineLines.end(); |
| break; |
| } |
| |
| assert(ConflictPos->size() > MacroDefLen && |
| "Invalid #define in predefines buffer?"); |
| if ((*ConflictPos)[MacroDefLen] != ' ' && |
| (*ConflictPos)[MacroDefLen] != '(') |
| continue; // Longer macro name; keep trying. |
| |
| // We found a conflicting macro definition. |
| break; |
| } |
| |
| if (ConflictPos != CmdLineLines.end()) { |
| Reader.Diag(diag::warn_cmdline_conflicting_macro_def) |
| << MacroName; |
| |
| // Show the definition of this macro within the PCH file. |
| std::pair<FileID, llvm::StringRef::size_type> MacroLoc = |
| FindMacro(Buffers, Missing); |
| assert(MacroLoc.second!=llvm::StringRef::npos && "Unable to find macro!"); |
| SourceLocation PCHMissingLoc = |
| SourceMgr.getLocForStartOfFile(MacroLoc.first) |
| .getFileLocWithOffset(MacroLoc.second); |
| Reader.Diag(PCHMissingLoc, diag::note_pch_macro_defined_as) << MacroName; |
| |
| ConflictingDefines = true; |
| continue; |
| } |
| |
| // If the macro doesn't conflict, then we'll just pick up the macro |
| // definition from the PCH file. Warn the user that they made a mistake. |
| if (ConflictingDefines) |
| continue; // Don't complain if there are already conflicting defs |
| |
| if (!MissingDefines) { |
| Reader.Diag(diag::warn_cmdline_missing_macro_defs); |
| MissingDefines = true; |
| } |
| |
| // Show the definition of this macro within the PCH file. |
| std::pair<FileID, llvm::StringRef::size_type> MacroLoc = |
| FindMacro(Buffers, Missing); |
| assert(MacroLoc.second!=llvm::StringRef::npos && "Unable to find macro!"); |
| SourceLocation PCHMissingLoc = |
| SourceMgr.getLocForStartOfFile(MacroLoc.first) |
| .getFileLocWithOffset(MacroLoc.second); |
| Reader.Diag(PCHMissingLoc, diag::note_using_macro_def_from_pch); |
| } |
| |
| if (ConflictingDefines) |
| return true; |
| |
| // Determine what predefines were introduced based on command-line |
| // parameters that were not present when building the PCH |
| // file. Extra #defines are okay, so long as the identifiers being |
| // defined were not used within the precompiled header. |
| std::vector<llvm::StringRef> ExtraPredefines; |
| std::set_difference(CmdLineLines.begin(), CmdLineLines.end(), |
| PCHLines.begin(), PCHLines.end(), |
| std::back_inserter(ExtraPredefines)); |
| for (unsigned I = 0, N = ExtraPredefines.size(); I != N; ++I) { |
| llvm::StringRef &Extra = ExtraPredefines[I]; |
| if (!Extra.startswith("#define ")) { |
| Reader.Diag(diag::warn_pch_compiler_options_mismatch); |
| return true; |
| } |
| |
| // This is an extra macro definition. Determine the name of the |
| // macro we're defining. |
| std::string::size_type StartOfMacroName = strlen("#define "); |
| std::string::size_type EndOfMacroName |
| = Extra.find_first_of("( \n\r", StartOfMacroName); |
| assert(EndOfMacroName != std::string::npos && |
| "Couldn't find the end of the macro name"); |
| llvm::StringRef MacroName = Extra.slice(StartOfMacroName, EndOfMacroName); |
| |
| // Check whether this name was used somewhere in the PCH file. If |
| // so, defining it as a macro could change behavior, so we reject |
| // the PCH file. |
| if (IdentifierInfo *II = Reader.get(MacroName)) { |
| Reader.Diag(diag::warn_macro_name_used_in_pch) << II; |
| return true; |
| } |
| |
| // Add this definition to the suggested predefines buffer. |
| SuggestedPredefines += Extra; |
| SuggestedPredefines += '\n'; |
| } |
| |
| // If we get here, it's because the predefines buffer had compatible |
| // contents. Accept the PCH file. |
| return false; |
| } |
| |
| void PCHValidator::ReadHeaderFileInfo(const HeaderFileInfo &HFI, |
| unsigned ID) { |
| PP.getHeaderSearchInfo().setHeaderFileInfoForUID(HFI, ID); |
| ++NumHeaderInfos; |
| } |
| |
| void PCHValidator::ReadCounter(unsigned Value) { |
| PP.setCounterValue(Value); |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // PCH reader implementation |
| //===----------------------------------------------------------------------===// |
| |
| PCHReader::PCHReader(Preprocessor &PP, ASTContext *Context, |
| const char *isysroot, bool DisableValidation) |
| : Listener(new PCHValidator(PP, *this)), DeserializationListener(0), |
| SourceMgr(PP.getSourceManager()), FileMgr(PP.getFileManager()), |
| Diags(PP.getDiagnostics()), SemaObj(0), PP(&PP), Context(Context), |
| Consumer(0), isysroot(isysroot), DisableValidation(DisableValidation), |
| NumStatHits(0), NumStatMisses(0), NumSLocEntriesRead(0), |
| TotalNumSLocEntries(0), NumStatementsRead(0), TotalNumStatements(0), |
| NumMacrosRead(0), TotalNumMacros(0), NumSelectorsRead(0), |
| NumMethodPoolEntriesRead(0), NumMethodPoolMisses(0), |
| TotalNumMethodPoolEntries(0), NumLexicalDeclContextsRead(0), |
| TotalLexicalDeclContexts(0), NumVisibleDeclContextsRead(0), |
| TotalVisibleDeclContexts(0), NumCurrentElementsDeserializing(0) { |
| RelocatablePCH = false; |
| } |
| |
| PCHReader::PCHReader(SourceManager &SourceMgr, FileManager &FileMgr, |
| Diagnostic &Diags, const char *isysroot, |
| bool DisableValidation) |
| : DeserializationListener(0), SourceMgr(SourceMgr), FileMgr(FileMgr), |
| Diags(Diags), SemaObj(0), PP(0), Context(0), Consumer(0), |
| isysroot(isysroot), DisableValidation(DisableValidation), NumStatHits(0), |
| NumStatMisses(0), NumSLocEntriesRead(0), TotalNumSLocEntries(0), |
| NumStatementsRead(0), TotalNumStatements(0), NumMacrosRead(0), |
| TotalNumMacros(0), NumSelectorsRead(0), NumMethodPoolEntriesRead(0), |
| NumMethodPoolMisses(0), TotalNumMethodPoolEntries(0), |
| NumLexicalDeclContextsRead(0), TotalLexicalDeclContexts(0), |
| NumVisibleDeclContextsRead(0), TotalVisibleDeclContexts(0), |
| NumCurrentElementsDeserializing(0) { |
| RelocatablePCH = false; |
| } |
| |
| PCHReader::~PCHReader() { |
| for (unsigned i = 0, e = Chain.size(); i != e; ++i) |
| delete Chain[e - i - 1]; |
| } |
| |
| PCHReader::PerFileData::PerFileData() |
| : StatCache(0), LocalNumSLocEntries(0), LocalNumTypes(0), TypeOffsets(0), |
| LocalNumDecls(0), DeclOffsets(0), LocalNumIdentifiers(0), |
| IdentifierOffsets(0), IdentifierTableData(0), IdentifierLookupTable(0), |
| LocalNumMacroDefinitions(0), MacroDefinitionOffsets(0), |
| NumPreallocatedPreprocessingEntities(0), SelectorLookupTable(0), |
| SelectorLookupTableData(0), SelectorOffsets(0), LocalNumSelectors(0) |
| {} |
| |
| void |
| PCHReader::setDeserializationListener(PCHDeserializationListener *Listener) { |
| DeserializationListener = Listener; |
| if (DeserializationListener) |
| DeserializationListener->SetReader(this); |
| } |
| |
| |
| namespace { |
| class PCHSelectorLookupTrait { |
| PCHReader &Reader; |
| |
| public: |
| struct data_type { |
| pch::SelectorID ID; |
| ObjCMethodList Instance, Factory; |
| }; |
| |
| typedef Selector external_key_type; |
| typedef external_key_type internal_key_type; |
| |
| explicit PCHSelectorLookupTrait(PCHReader &Reader) : Reader(Reader) { } |
| |
| static bool EqualKey(const internal_key_type& a, |
| const internal_key_type& b) { |
| return a == b; |
| } |
| |
| static unsigned ComputeHash(Selector Sel) { |
| unsigned N = Sel.getNumArgs(); |
| if (N == 0) |
| ++N; |
| unsigned R = 5381; |
| for (unsigned I = 0; I != N; ++I) |
| if (IdentifierInfo *II = Sel.getIdentifierInfoForSlot(I)) |
| R = llvm::HashString(II->getName(), R); |
| return R; |
| } |
| |
| // This hopefully will just get inlined and removed by the optimizer. |
| static const internal_key_type& |
| GetInternalKey(const external_key_type& x) { return x; } |
| |
| static std::pair<unsigned, unsigned> |
| ReadKeyDataLength(const unsigned char*& d) { |
| using namespace clang::io; |
| unsigned KeyLen = ReadUnalignedLE16(d); |
| unsigned DataLen = ReadUnalignedLE16(d); |
| return std::make_pair(KeyLen, DataLen); |
| } |
| |
| internal_key_type ReadKey(const unsigned char* d, unsigned) { |
| using namespace clang::io; |
| SelectorTable &SelTable = Reader.getContext()->Selectors; |
| unsigned N = ReadUnalignedLE16(d); |
| IdentifierInfo *FirstII |
| = Reader.DecodeIdentifierInfo(ReadUnalignedLE32(d)); |
| if (N == 0) |
| return SelTable.getNullarySelector(FirstII); |
| else if (N == 1) |
| return SelTable.getUnarySelector(FirstII); |
| |
| llvm::SmallVector<IdentifierInfo *, 16> Args; |
| Args.push_back(FirstII); |
| for (unsigned I = 1; I != N; ++I) |
| Args.push_back(Reader.DecodeIdentifierInfo(ReadUnalignedLE32(d))); |
| |
| return SelTable.getSelector(N, Args.data()); |
| } |
| |
| data_type ReadData(Selector, const unsigned char* d, unsigned DataLen) { |
| using namespace clang::io; |
| |
| data_type Result; |
| |
| Result.ID = ReadUnalignedLE32(d); |
| unsigned NumInstanceMethods = ReadUnalignedLE16(d); |
| unsigned NumFactoryMethods = ReadUnalignedLE16(d); |
| |
| // Load instance methods |
| ObjCMethodList *Prev = 0; |
| for (unsigned I = 0; I != NumInstanceMethods; ++I) { |
| ObjCMethodDecl *Method |
| = cast<ObjCMethodDecl>(Reader.GetDecl(ReadUnalignedLE32(d))); |
| if (!Result.Instance.Method) { |
| // This is the first method, which is the easy case. |
| Result.Instance.Method = Method; |
| Prev = &Result.Instance; |
| continue; |
| } |
| |
| ObjCMethodList *Mem = |
| Reader.getSema()->BumpAlloc.Allocate<ObjCMethodList>(); |
| Prev->Next = new (Mem) ObjCMethodList(Method, 0); |
| Prev = Prev->Next; |
| } |
| |
| // Load factory methods |
| Prev = 0; |
| for (unsigned I = 0; I != NumFactoryMethods; ++I) { |
| ObjCMethodDecl *Method |
| = cast<ObjCMethodDecl>(Reader.GetDecl(ReadUnalignedLE32(d))); |
| if (!Result.Factory.Method) { |
| // This is the first method, which is the easy case. |
| Result.Factory.Method = Method; |
| Prev = &Result.Factory; |
| continue; |
| } |
| |
| ObjCMethodList *Mem = |
| Reader.getSema()->BumpAlloc.Allocate<ObjCMethodList>(); |
| Prev->Next = new (Mem) ObjCMethodList(Method, 0); |
| Prev = Prev->Next; |
| } |
| |
| return Result; |
| } |
| }; |
| |
| } // end anonymous namespace |
| |
| /// \brief The on-disk hash table used for the global method pool. |
| typedef OnDiskChainedHashTable<PCHSelectorLookupTrait> |
| PCHSelectorLookupTable; |
| |
| namespace { |
| class PCHIdentifierLookupTrait { |
| PCHReader &Reader; |
| llvm::BitstreamCursor &Stream; |
| |
| // If we know the IdentifierInfo in advance, it is here and we will |
| // not build a new one. Used when deserializing information about an |
| // identifier that was constructed before the PCH file was read. |
| IdentifierInfo *KnownII; |
| |
| public: |
| typedef IdentifierInfo * data_type; |
| |
| typedef const std::pair<const char*, unsigned> external_key_type; |
| |
| typedef external_key_type internal_key_type; |
| |
| PCHIdentifierLookupTrait(PCHReader &Reader, llvm::BitstreamCursor &Stream, |
| IdentifierInfo *II = 0) |
| : Reader(Reader), Stream(Stream), KnownII(II) { } |
| |
| static bool EqualKey(const internal_key_type& a, |
| const internal_key_type& b) { |
| return (a.second == b.second) ? memcmp(a.first, b.first, a.second) == 0 |
| : false; |
| } |
| |
| static unsigned ComputeHash(const internal_key_type& a) { |
| return llvm::HashString(llvm::StringRef(a.first, a.second)); |
| } |
| |
| // This hopefully will just get inlined and removed by the optimizer. |
| static const internal_key_type& |
| GetInternalKey(const external_key_type& x) { return x; } |
| |
| static std::pair<unsigned, unsigned> |
| ReadKeyDataLength(const unsigned char*& d) { |
| using namespace clang::io; |
| unsigned DataLen = ReadUnalignedLE16(d); |
| unsigned KeyLen = ReadUnalignedLE16(d); |
| return std::make_pair(KeyLen, DataLen); |
| } |
| |
| static std::pair<const char*, unsigned> |
| ReadKey(const unsigned char* d, unsigned n) { |
| assert(n >= 2 && d[n-1] == '\0'); |
| return std::make_pair((const char*) d, n-1); |
| } |
| |
| IdentifierInfo *ReadData(const internal_key_type& k, |
| const unsigned char* d, |
| unsigned DataLen) { |
| using namespace clang::io; |
| pch::IdentID ID = ReadUnalignedLE32(d); |
| bool IsInteresting = ID & 0x01; |
| |
| // Wipe out the "is interesting" bit. |
| ID = ID >> 1; |
| |
| if (!IsInteresting) { |
| // For uninteresting identifiers, just build the IdentifierInfo |
| // and associate it with the persistent ID. |
| IdentifierInfo *II = KnownII; |
| if (!II) |
| II = &Reader.getIdentifierTable().getOwn(k.first, k.first + k.second); |
| Reader.SetIdentifierInfo(ID, II); |
| II->setIsFromPCH(); |
| return II; |
| } |
| |
| unsigned Bits = ReadUnalignedLE16(d); |
| bool CPlusPlusOperatorKeyword = Bits & 0x01; |
| Bits >>= 1; |
| bool Poisoned = Bits & 0x01; |
| Bits >>= 1; |
| bool ExtensionToken = Bits & 0x01; |
| Bits >>= 1; |
| bool hasMacroDefinition = Bits & 0x01; |
| Bits >>= 1; |
| unsigned ObjCOrBuiltinID = Bits & 0x3FF; |
| Bits >>= 10; |
| |
| assert(Bits == 0 && "Extra bits in the identifier?"); |
| DataLen -= 6; |
| |
| // Build the IdentifierInfo itself and link the identifier ID with |
| // the new IdentifierInfo. |
| IdentifierInfo *II = KnownII; |
| if (!II) |
| II = &Reader.getIdentifierTable().getOwn(k.first, k.first + k.second); |
| Reader.SetIdentifierInfo(ID, II); |
| |
| // Set or check the various bits in the IdentifierInfo structure. |
| // FIXME: Load token IDs lazily, too? |
| II->setObjCOrBuiltinID(ObjCOrBuiltinID); |
| assert(II->isExtensionToken() == ExtensionToken && |
| "Incorrect extension token flag"); |
| (void)ExtensionToken; |
| II->setIsPoisoned(Poisoned); |
| assert(II->isCPlusPlusOperatorKeyword() == CPlusPlusOperatorKeyword && |
| "Incorrect C++ operator keyword flag"); |
| (void)CPlusPlusOperatorKeyword; |
| |
| // If this identifier is a macro, deserialize the macro |
| // definition. |
| if (hasMacroDefinition) { |
| uint32_t Offset = ReadUnalignedLE32(d); |
| Reader.ReadMacroRecord(Stream, Offset); |
| DataLen -= 4; |
| } |
| |
| // Read all of the declarations visible at global scope with this |
| // name. |
| if (Reader.getContext() == 0) return II; |
| if (DataLen > 0) { |
| llvm::SmallVector<uint32_t, 4> DeclIDs; |
| for (; DataLen > 0; DataLen -= 4) |
| DeclIDs.push_back(ReadUnalignedLE32(d)); |
| Reader.SetGloballyVisibleDecls(II, DeclIDs); |
| } |
| |
| II->setIsFromPCH(); |
| return II; |
| } |
| }; |
| |
| } // end anonymous namespace |
| |
| /// \brief The on-disk hash table used to contain information about |
| /// all of the identifiers in the program. |
| typedef OnDiskChainedHashTable<PCHIdentifierLookupTrait> |
| PCHIdentifierLookupTable; |
| |
| void PCHReader::Error(const char *Msg) { |
| Diag(diag::err_fe_pch_malformed) << Msg; |
| } |
| |
| /// \brief Check the contents of the concatenation of all predefines buffers in |
| /// the PCH chain against the contents of the predefines buffer of the current |
| /// compiler invocation. |
| /// |
| /// The contents should be the same. If not, then some command-line option |
| /// changed the preprocessor state and we must probably reject the PCH file. |
| /// |
| /// \returns true if there was a mismatch (in which case the PCH file |
| /// should be ignored), or false otherwise. |
| bool PCHReader::CheckPredefinesBuffers() { |
| if (Listener) |
| return Listener->ReadPredefinesBuffer(PCHPredefinesBuffers, |
| ActualOriginalFileName, |
| SuggestedPredefines); |
| return false; |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // Source Manager Deserialization |
| //===----------------------------------------------------------------------===// |
| |
| /// \brief Read the line table in the source manager block. |
| /// \returns true if ther was an error. |
| bool PCHReader::ParseLineTable(llvm::SmallVectorImpl<uint64_t> &Record) { |
| unsigned Idx = 0; |
| LineTableInfo &LineTable = SourceMgr.getLineTable(); |
| |
| // Parse the file names |
| std::map<int, int> FileIDs; |
| for (int I = 0, N = Record[Idx++]; I != N; ++I) { |
| // Extract the file name |
| unsigned FilenameLen = Record[Idx++]; |
| std::string Filename(&Record[Idx], &Record[Idx] + FilenameLen); |
| Idx += FilenameLen; |
| MaybeAddSystemRootToFilename(Filename); |
| FileIDs[I] = LineTable.getLineTableFilenameID(Filename.c_str(), |
| Filename.size()); |
| } |
| |
| // Parse the line entries |
| std::vector<LineEntry> Entries; |
| while (Idx < Record.size()) { |
| int FID = Record[Idx++]; |
| |
| // Extract the line entries |
| unsigned NumEntries = Record[Idx++]; |
| assert(NumEntries && "Numentries is 00000"); |
| Entries.clear(); |
| Entries.reserve(NumEntries); |
| for (unsigned I = 0; I != NumEntries; ++I) { |
| unsigned FileOffset = Record[Idx++]; |
| unsigned LineNo = Record[Idx++]; |
| int FilenameID = FileIDs[Record[Idx++]]; |
| SrcMgr::CharacteristicKind FileKind |
| = (SrcMgr::CharacteristicKind)Record[Idx++]; |
| unsigned IncludeOffset = Record[Idx++]; |
| Entries.push_back(LineEntry::get(FileOffset, LineNo, FilenameID, |
| FileKind, IncludeOffset)); |
| } |
| LineTable.AddEntry(FID, Entries); |
| } |
| |
| return false; |
| } |
| |
| namespace { |
| |
| class PCHStatData { |
| public: |
| const bool hasStat; |
| const ino_t ino; |
| const dev_t dev; |
| const mode_t mode; |
| const time_t mtime; |
| const off_t size; |
| |
| PCHStatData(ino_t i, dev_t d, mode_t mo, time_t m, off_t s) |
| : hasStat(true), ino(i), dev(d), mode(mo), mtime(m), size(s) {} |
| |
| PCHStatData() |
| : hasStat(false), ino(0), dev(0), mode(0), mtime(0), size(0) {} |
| }; |
| |
| class PCHStatLookupTrait { |
| public: |
| typedef const char *external_key_type; |
| typedef const char *internal_key_type; |
| |
| typedef PCHStatData data_type; |
| |
| static unsigned ComputeHash(const char *path) { |
| return llvm::HashString(path); |
| } |
| |
| static internal_key_type GetInternalKey(const char *path) { return path; } |
| |
| static bool EqualKey(internal_key_type a, internal_key_type b) { |
| return strcmp(a, b) == 0; |
| } |
| |
| static std::pair<unsigned, unsigned> |
| ReadKeyDataLength(const unsigned char*& d) { |
| unsigned KeyLen = (unsigned) clang::io::ReadUnalignedLE16(d); |
| unsigned DataLen = (unsigned) *d++; |
| return std::make_pair(KeyLen + 1, DataLen); |
| } |
| |
| static internal_key_type ReadKey(const unsigned char *d, unsigned) { |
| return (const char *)d; |
| } |
| |
| static data_type ReadData(const internal_key_type, const unsigned char *d, |
| unsigned /*DataLen*/) { |
| using namespace clang::io; |
| |
| if (*d++ == 1) |
| return data_type(); |
| |
| ino_t ino = (ino_t) ReadUnalignedLE32(d); |
| dev_t dev = (dev_t) ReadUnalignedLE32(d); |
| mode_t mode = (mode_t) ReadUnalignedLE16(d); |
| time_t mtime = (time_t) ReadUnalignedLE64(d); |
| off_t size = (off_t) ReadUnalignedLE64(d); |
| return data_type(ino, dev, mode, mtime, size); |
| } |
| }; |
| |
| /// \brief stat() cache for precompiled headers. |
| /// |
| /// This cache is very similar to the stat cache used by pretokenized |
| /// headers. |
| class PCHStatCache : public StatSysCallCache { |
| typedef OnDiskChainedHashTable<PCHStatLookupTrait> CacheTy; |
| CacheTy *Cache; |
| |
| unsigned &NumStatHits, &NumStatMisses; |
| public: |
| PCHStatCache(const unsigned char *Buckets, |
| const unsigned char *Base, |
| unsigned &NumStatHits, |
| unsigned &NumStatMisses) |
| : Cache(0), NumStatHits(NumStatHits), NumStatMisses(NumStatMisses) { |
| Cache = CacheTy::Create(Buckets, Base); |
| } |
| |
| ~PCHStatCache() { delete Cache; } |
| |
| int stat(const char *path, struct stat *buf) { |
| // Do the lookup for the file's data in the PCH file. |
| CacheTy::iterator I = Cache->find(path); |
| |
| // If we don't get a hit in the PCH file just forward to 'stat'. |
| if (I == Cache->end()) { |
| ++NumStatMisses; |
| return StatSysCallCache::stat(path, buf); |
| } |
| |
| ++NumStatHits; |
| PCHStatData Data = *I; |
| |
| if (!Data.hasStat) |
| return 1; |
| |
| buf->st_ino = Data.ino; |
| buf->st_dev = Data.dev; |
| buf->st_mtime = Data.mtime; |
| buf->st_mode = Data.mode; |
| buf->st_size = Data.size; |
| return 0; |
| } |
| }; |
| } // end anonymous namespace |
| |
| |
| /// \brief Read a source manager block |
| PCHReader::PCHReadResult PCHReader::ReadSourceManagerBlock(PerFileData &F) { |
| using namespace SrcMgr; |
| |
| llvm::BitstreamCursor &SLocEntryCursor = F.SLocEntryCursor; |
| |
| // Set the source-location entry cursor to the current position in |
| // the stream. This cursor will be used to read the contents of the |
| // source manager block initially, and then lazily read |
| // source-location entries as needed. |
| SLocEntryCursor = F.Stream; |
| |
| // The stream itself is going to skip over the source manager block. |
| if (F.Stream.SkipBlock()) { |
| Error("malformed block record in PCH file"); |
| return Failure; |
| } |
| |
| // Enter the source manager block. |
| if (SLocEntryCursor.EnterSubBlock(pch::SOURCE_MANAGER_BLOCK_ID)) { |
| Error("malformed source manager block record in PCH file"); |
| return Failure; |
| } |
| |
| RecordData Record; |
| while (true) { |
| unsigned Code = SLocEntryCursor.ReadCode(); |
| if (Code == llvm::bitc::END_BLOCK) { |
| if (SLocEntryCursor.ReadBlockEnd()) { |
| Error("error at end of Source Manager block in PCH file"); |
| return Failure; |
| } |
| return Success; |
| } |
| |
| if (Code == llvm::bitc::ENTER_SUBBLOCK) { |
| // No known subblocks, always skip them. |
| SLocEntryCursor.ReadSubBlockID(); |
| if (SLocEntryCursor.SkipBlock()) { |
| Error("malformed block record in PCH file"); |
| return Failure; |
| } |
| continue; |
| } |
| |
| if (Code == llvm::bitc::DEFINE_ABBREV) { |
| SLocEntryCursor.ReadAbbrevRecord(); |
| continue; |
| } |
| |
| // Read a record. |
| const char *BlobStart; |
| unsigned BlobLen; |
| Record.clear(); |
| switch (SLocEntryCursor.ReadRecord(Code, Record, &BlobStart, &BlobLen)) { |
| default: // Default behavior: ignore. |
| break; |
| |
| case pch::SM_LINE_TABLE: |
| if (ParseLineTable(Record)) |
| return Failure; |
| break; |
| |
| case pch::SM_SLOC_FILE_ENTRY: |
| case pch::SM_SLOC_BUFFER_ENTRY: |
| case pch::SM_SLOC_INSTANTIATION_ENTRY: |
| // Once we hit one of the source location entries, we're done. |
| return Success; |
| } |
| } |
| } |
| |
| /// \brief Get a cursor that's correctly positioned for reading the source |
| /// location entry with the given ID. |
| llvm::BitstreamCursor &PCHReader::SLocCursorForID(unsigned ID) { |
| assert(ID != 0 && ID <= TotalNumSLocEntries && |
| "SLocCursorForID should only be called for real IDs."); |
| |
| ID -= 1; |
| PerFileData *F = 0; |
| for (unsigned I = 0, N = Chain.size(); I != N; ++I) { |
| F = Chain[N - I - 1]; |
| if (ID < F->LocalNumSLocEntries) |
| break; |
| ID -= F->LocalNumSLocEntries; |
| } |
| assert(F && F->LocalNumSLocEntries > ID && "Chain corrupted"); |
| |
| F->SLocEntryCursor.JumpToBit(F->SLocOffsets[ID]); |
| return F->SLocEntryCursor; |
| } |
| |
| /// \brief Read in the source location entry with the given ID. |
| PCHReader::PCHReadResult PCHReader::ReadSLocEntryRecord(unsigned ID) { |
| if (ID == 0) |
| return Success; |
| |
| if (ID > TotalNumSLocEntries) { |
| Error("source location entry ID out-of-range for PCH file"); |
| return Failure; |
| } |
| |
| llvm::BitstreamCursor &SLocEntryCursor = SLocCursorForID(ID); |
| |
| ++NumSLocEntriesRead; |
| unsigned Code = SLocEntryCursor.ReadCode(); |
| if (Code == llvm::bitc::END_BLOCK || |
| Code == llvm::bitc::ENTER_SUBBLOCK || |
| Code == llvm::bitc::DEFINE_ABBREV) { |
| Error("incorrectly-formatted source location entry in PCH file"); |
| return Failure; |
| } |
| |
| RecordData Record; |
| const char *BlobStart; |
| unsigned BlobLen; |
| switch (SLocEntryCursor.ReadRecord(Code, Record, &BlobStart, &BlobLen)) { |
| default: |
| Error("incorrectly-formatted source location entry in PCH file"); |
| return Failure; |
| |
| case pch::SM_SLOC_FILE_ENTRY: { |
| std::string Filename(BlobStart, BlobStart + BlobLen); |
| MaybeAddSystemRootToFilename(Filename); |
| const FileEntry *File = FileMgr.getFile(Filename); |
| if (File == 0) { |
| std::string ErrorStr = "could not find file '"; |
| ErrorStr += Filename; |
| ErrorStr += "' referenced by PCH file"; |
| Error(ErrorStr.c_str()); |
| return Failure; |
| } |
| |
| if (Record.size() < 10) { |
| Error("source location entry is incorrect"); |
| return Failure; |
| } |
| |
| if (!DisableValidation && |
| ((off_t)Record[4] != File->getSize() |
| #if !defined(LLVM_ON_WIN32) |
| // In our regression testing, the Windows file system seems to |
| // have inconsistent modification times that sometimes |
| // erroneously trigger this error-handling path. |
| || (time_t)Record[5] != File->getModificationTime() |
| #endif |
| )) { |
| Diag(diag::err_fe_pch_file_modified) |
| << Filename; |
| return Failure; |
| } |
| |
| FileID FID = SourceMgr.createFileID(File, |
| SourceLocation::getFromRawEncoding(Record[1]), |
| (SrcMgr::CharacteristicKind)Record[2], |
| ID, Record[0]); |
| if (Record[3]) |
| const_cast<SrcMgr::FileInfo&>(SourceMgr.getSLocEntry(FID).getFile()) |
| .setHasLineDirectives(); |
| |
| // Reconstruct header-search information for this file. |
| HeaderFileInfo HFI; |
| HFI.isImport = Record[6]; |
| HFI.DirInfo = Record[7]; |
| HFI.NumIncludes = Record[8]; |
| HFI.ControllingMacroID = Record[9]; |
| if (Listener) |
| Listener->ReadHeaderFileInfo(HFI, File->getUID()); |
| break; |
| } |
| |
| case pch::SM_SLOC_BUFFER_ENTRY: { |
| const char *Name = BlobStart; |
| unsigned Offset = Record[0]; |
| unsigned Code = SLocEntryCursor.ReadCode(); |
| Record.clear(); |
| unsigned RecCode |
| = SLocEntryCursor.ReadRecord(Code, Record, &BlobStart, &BlobLen); |
| |
| if (RecCode != pch::SM_SLOC_BUFFER_BLOB) { |
| Error("PCH record has invalid code"); |
| return Failure; |
| } |
| |
| llvm::MemoryBuffer *Buffer |
| = llvm::MemoryBuffer::getMemBuffer(llvm::StringRef(BlobStart, BlobLen - 1), |
| Name); |
| FileID BufferID = SourceMgr.createFileIDForMemBuffer(Buffer, ID, Offset); |
| |
| if (strcmp(Name, "<built-in>") == 0) { |
| PCHPredefinesBlock Block = { |
| BufferID, |
| llvm::StringRef(BlobStart, BlobLen - 1) |
| }; |
| PCHPredefinesBuffers.push_back(Block); |
| } |
| |
| break; |
| } |
| |
| case pch::SM_SLOC_INSTANTIATION_ENTRY: { |
| SourceLocation SpellingLoc |
| = SourceLocation::getFromRawEncoding(Record[1]); |
| SourceMgr.createInstantiationLoc(SpellingLoc, |
| SourceLocation::getFromRawEncoding(Record[2]), |
| SourceLocation::getFromRawEncoding(Record[3]), |
| Record[4], |
| ID, |
| Record[0]); |
| break; |
| } |
| } |
| |
| return Success; |
| } |
| |
| /// ReadBlockAbbrevs - Enter a subblock of the specified BlockID with the |
| /// specified cursor. Read the abbreviations that are at the top of the block |
| /// and then leave the cursor pointing into the block. |
| bool PCHReader::ReadBlockAbbrevs(llvm::BitstreamCursor &Cursor, |
| unsigned BlockID) { |
| if (Cursor.EnterSubBlock(BlockID)) { |
| Error("malformed block record in PCH file"); |
| return Failure; |
| } |
| |
| while (true) { |
| unsigned Code = Cursor.ReadCode(); |
| |
| // We expect all abbrevs to be at the start of the block. |
| if (Code != llvm::bitc::DEFINE_ABBREV) |
| return false; |
| Cursor.ReadAbbrevRecord(); |
| } |
| } |
| |
| void PCHReader::ReadMacroRecord(llvm::BitstreamCursor &Stream, uint64_t Offset){ |
| assert(PP && "Forgot to set Preprocessor ?"); |
| |
| // Keep track of where we are in the stream, then jump back there |
| // after reading this macro. |
| SavedStreamPosition SavedPosition(Stream); |
| |
| Stream.JumpToBit(Offset); |
| RecordData Record; |
| llvm::SmallVector<IdentifierInfo*, 16> MacroArgs; |
| MacroInfo *Macro = 0; |
| |
| while (true) { |
| unsigned Code = Stream.ReadCode(); |
| switch (Code) { |
| case llvm::bitc::END_BLOCK: |
| return; |
| |
| case llvm::bitc::ENTER_SUBBLOCK: |
| // No known subblocks, always skip them. |
| Stream.ReadSubBlockID(); |
| if (Stream.SkipBlock()) { |
| Error("malformed block record in PCH file"); |
| return; |
| } |
| continue; |
| |
| case llvm::bitc::DEFINE_ABBREV: |
| Stream.ReadAbbrevRecord(); |
| continue; |
| default: break; |
| } |
| |
| // Read a record. |
| Record.clear(); |
| pch::PreprocessorRecordTypes RecType = |
| (pch::PreprocessorRecordTypes)Stream.ReadRecord(Code, Record); |
| switch (RecType) { |
| case pch::PP_MACRO_OBJECT_LIKE: |
| case pch::PP_MACRO_FUNCTION_LIKE: { |
| // If we already have a macro, that means that we've hit the end |
| // of the definition of the macro we were looking for. We're |
| // done. |
| if (Macro) |
| return; |
| |
| IdentifierInfo *II = DecodeIdentifierInfo(Record[0]); |
| if (II == 0) { |
| Error("macro must have a name in PCH file"); |
| return; |
| } |
| SourceLocation Loc = SourceLocation::getFromRawEncoding(Record[1]); |
| bool isUsed = Record[2]; |
| |
| MacroInfo *MI = PP->AllocateMacroInfo(Loc); |
| MI->setIsUsed(isUsed); |
| MI->setIsFromPCH(); |
| |
| unsigned NextIndex = 3; |
| if (RecType == pch::PP_MACRO_FUNCTION_LIKE) { |
| // Decode function-like macro info. |
| bool isC99VarArgs = Record[3]; |
| bool isGNUVarArgs = Record[4]; |
| MacroArgs.clear(); |
| unsigned NumArgs = Record[5]; |
| NextIndex = 6 + NumArgs; |
| for (unsigned i = 0; i != NumArgs; ++i) |
| MacroArgs.push_back(DecodeIdentifierInfo(Record[6+i])); |
| |
| // Install function-like macro info. |
| MI->setIsFunctionLike(); |
| if (isC99VarArgs) MI->setIsC99Varargs(); |
| if (isGNUVarArgs) MI->setIsGNUVarargs(); |
| MI->setArgumentList(MacroArgs.data(), MacroArgs.size(), |
| PP->getPreprocessorAllocator()); |
| } |
| |
| // Finally, install the macro. |
| PP->setMacroInfo(II, MI); |
| |
| // Remember that we saw this macro last so that we add the tokens that |
| // form its body to it. |
| Macro = MI; |
| |
| if (NextIndex + 1 == Record.size() && PP->getPreprocessingRecord()) { |
| // We have a macro definition. Load it now. |
| PP->getPreprocessingRecord()->RegisterMacroDefinition(Macro, |
| getMacroDefinition(Record[NextIndex])); |
| } |
| |
| ++NumMacrosRead; |
| break; |
| } |
| |
| case pch::PP_TOKEN: { |
| // If we see a TOKEN before a PP_MACRO_*, then the file is |
| // erroneous, just pretend we didn't see this. |
| if (Macro == 0) break; |
| |
| Token Tok; |
| Tok.startToken(); |
| Tok.setLocation(SourceLocation::getFromRawEncoding(Record[0])); |
| Tok.setLength(Record[1]); |
| if (IdentifierInfo *II = DecodeIdentifierInfo(Record[2])) |
| Tok.setIdentifierInfo(II); |
| Tok.setKind((tok::TokenKind)Record[3]); |
| Tok.setFlag((Token::TokenFlags)Record[4]); |
| Macro->AddTokenToBody(Tok); |
| break; |
| } |
| |
| case pch::PP_MACRO_INSTANTIATION: { |
| // If we already have a macro, that means that we've hit the end |
| // of the definition of the macro we were looking for. We're |
| // done. |
| if (Macro) |
| return; |
| |
| if (!PP->getPreprocessingRecord()) { |
| Error("missing preprocessing record in PCH file"); |
| return; |
| } |
| |
| PreprocessingRecord &PPRec = *PP->getPreprocessingRecord(); |
| if (PPRec.getPreprocessedEntity(Record[0])) |
| return; |
| |
| MacroInstantiation *MI |
| = new (PPRec) MacroInstantiation(DecodeIdentifierInfo(Record[3]), |
| SourceRange( |
| SourceLocation::getFromRawEncoding(Record[1]), |
| SourceLocation::getFromRawEncoding(Record[2])), |
| getMacroDefinition(Record[4])); |
| PPRec.SetPreallocatedEntity(Record[0], MI); |
| return; |
| } |
| |
| case pch::PP_MACRO_DEFINITION: { |
| // If we already have a macro, that means that we've hit the end |
| // of the definition of the macro we were looking for. We're |
| // done. |
| if (Macro) |
| return; |
| |
| if (!PP->getPreprocessingRecord()) { |
| Error("missing preprocessing record in PCH file"); |
| return; |
| } |
| |
| PreprocessingRecord &PPRec = *PP->getPreprocessingRecord(); |
| if (PPRec.getPreprocessedEntity(Record[0])) |
| return; |
| |
| if (Record[1] >= MacroDefinitionsLoaded.size()) { |
| Error("out-of-bounds macro definition record"); |
| return; |
| } |
| |
| MacroDefinition *MD |
| = new (PPRec) MacroDefinition(DecodeIdentifierInfo(Record[4]), |
| SourceLocation::getFromRawEncoding(Record[5]), |
| SourceRange( |
| SourceLocation::getFromRawEncoding(Record[2]), |
| SourceLocation::getFromRawEncoding(Record[3]))); |
| PPRec.SetPreallocatedEntity(Record[0], MD); |
| MacroDefinitionsLoaded[Record[1]] = MD; |
| return; |
| } |
| } |
| } |
| } |
| |
| void PCHReader::ReadDefinedMacros() { |
| for (unsigned I = 0, N = Chain.size(); I != N; ++I) { |
| llvm::BitstreamCursor &MacroCursor = Chain[N - I - 1]->MacroCursor; |
| |
| // If there was no preprocessor block, skip this file. |
| if (!MacroCursor.getBitStreamReader()) |
| continue; |
| |
| llvm::BitstreamCursor Cursor = MacroCursor; |
| if (Cursor.EnterSubBlock(pch::PREPROCESSOR_BLOCK_ID)) { |
| Error("malformed preprocessor block record in PCH file"); |
| return; |
| } |
| |
| RecordData Record; |
| while (true) { |
| unsigned Code = Cursor.ReadCode(); |
| if (Code == llvm::bitc::END_BLOCK) { |
| if (Cursor.ReadBlockEnd()) { |
| Error("error at end of preprocessor block in PCH file"); |
| return; |
| } |
| break; |
| } |
| |
| if (Code == llvm::bitc::ENTER_SUBBLOCK) { |
| // No known subblocks, always skip them. |
| Cursor.ReadSubBlockID(); |
| if (Cursor.SkipBlock()) { |
| Error("malformed block record in PCH file"); |
| return; |
| } |
| continue; |
| } |
| |
| if (Code == llvm::bitc::DEFINE_ABBREV) { |
| Cursor.ReadAbbrevRecord(); |
| continue; |
| } |
| |
| // Read a record. |
| const char *BlobStart; |
| unsigned BlobLen; |
| Record.clear(); |
| switch (Cursor.ReadRecord(Code, Record, &BlobStart, &BlobLen)) { |
| default: // Default behavior: ignore. |
| break; |
| |
| case pch::PP_MACRO_OBJECT_LIKE: |
| case pch::PP_MACRO_FUNCTION_LIKE: |
| DecodeIdentifierInfo(Record[0]); |
| break; |
| |
| case pch::PP_TOKEN: |
| // Ignore tokens. |
| break; |
| |
| case pch::PP_MACRO_INSTANTIATION: |
| case pch::PP_MACRO_DEFINITION: |
| // Read the macro record. |
| ReadMacroRecord(Chain[N - I - 1]->Stream, Cursor.GetCurrentBitNo()); |
| break; |
| } |
| } |
| } |
| } |
| |
| MacroDefinition *PCHReader::getMacroDefinition(pch::IdentID ID) { |
| if (ID == 0 || ID >= MacroDefinitionsLoaded.size()) |
| return 0; |
| |
| if (!MacroDefinitionsLoaded[ID]) { |
| unsigned Index = ID; |
| for (unsigned I = 0, N = Chain.size(); I != N; ++I) { |
| PerFileData &F = *Chain[N - I - 1]; |
| if (Index < F.LocalNumMacroDefinitions) { |
| ReadMacroRecord(F.Stream, F.MacroDefinitionOffsets[Index]); |
| break; |
| } |
| Index -= F.LocalNumMacroDefinitions; |
| } |
| assert(MacroDefinitionsLoaded[ID] && "Broken chain"); |
| } |
| |
| return MacroDefinitionsLoaded[ID]; |
| } |
| |
| /// \brief If we are loading a relocatable PCH file, and the filename is |
| /// not an absolute path, add the system root to the beginning of the file |
| /// name. |
| void PCHReader::MaybeAddSystemRootToFilename(std::string &Filename) { |
| // If this is not a relocatable PCH file, there's nothing to do. |
| if (!RelocatablePCH) |
| return; |
| |
| if (Filename.empty() || llvm::sys::Path(Filename).isAbsolute()) |
| return; |
| |
| if (isysroot == 0) { |
| // If no system root was given, default to '/' |
| Filename.insert(Filename.begin(), '/'); |
| return; |
| } |
| |
| unsigned Length = strlen(isysroot); |
| if (isysroot[Length - 1] != '/') |
| Filename.insert(Filename.begin(), '/'); |
| |
| Filename.insert(Filename.begin(), isysroot, isysroot + Length); |
| } |
| |
| PCHReader::PCHReadResult |
| PCHReader::ReadPCHBlock(PerFileData &F) { |
| llvm::BitstreamCursor &Stream = F.Stream; |
| |
| if (Stream.EnterSubBlock(pch::PCH_BLOCK_ID)) { |
| Error("malformed block record in PCH file"); |
| return Failure; |
| } |
| |
| // Read all of the records and blocks for the PCH file. |
| RecordData Record; |
| bool First = true; |
| while (!Stream.AtEndOfStream()) { |
| unsigned Code = Stream.ReadCode(); |
| if (Code == llvm::bitc::END_BLOCK) { |
| if (Stream.ReadBlockEnd()) { |
| Error("error at end of module block in PCH file"); |
| return Failure; |
| } |
| |
| return Success; |
| } |
| |
| if (Code == llvm::bitc::ENTER_SUBBLOCK) { |
| switch (Stream.ReadSubBlockID()) { |
| case pch::DECLTYPES_BLOCK_ID: |
| // We lazily load the decls block, but we want to set up the |
| // DeclsCursor cursor to point into it. Clone our current bitcode |
| // cursor to it, enter the block and read the abbrevs in that block. |
| // With the main cursor, we just skip over it. |
| F.DeclsCursor = Stream; |
| if (Stream.SkipBlock() || // Skip with the main cursor. |
| // Read the abbrevs. |
| ReadBlockAbbrevs(F.DeclsCursor, pch::DECLTYPES_BLOCK_ID)) { |
| Error("malformed block record in PCH file"); |
| return Failure; |
| } |
| break; |
| |
| case pch::PREPROCESSOR_BLOCK_ID: |
| F.MacroCursor = Stream; |
| if (PP) |
| PP->setExternalSource(this); |
| |
| if (Stream.SkipBlock()) { |
| Error("malformed block record in PCH file"); |
| return Failure; |
| } |
| break; |
| |
| case pch::SOURCE_MANAGER_BLOCK_ID: |
| switch (ReadSourceManagerBlock(F)) { |
| case Success: |
| break; |
| |
| case Failure: |
| Error("malformed source manager block in PCH file"); |
| return Failure; |
| |
| case IgnorePCH: |
| return IgnorePCH; |
| } |
| break; |
| } |
| First = false; |
| continue; |
| } |
| |
| if (Code == llvm::bitc::DEFINE_ABBREV) { |
| Stream.ReadAbbrevRecord(); |
| continue; |
| } |
| |
| // Read and process a record. |
| Record.clear(); |
| const char *BlobStart = 0; |
| unsigned BlobLen = 0; |
| switch ((pch::PCHRecordTypes)Stream.ReadRecord(Code, Record, |
| &BlobStart, &BlobLen)) { |
| default: // Default behavior: ignore. |
| break; |
| |
| case pch::METADATA: { |
| if (Record[0] != pch::VERSION_MAJOR && !DisableValidation) { |
| Diag(Record[0] < pch::VERSION_MAJOR? diag::warn_pch_version_too_old |
| : diag::warn_pch_version_too_new); |
| return IgnorePCH; |
| } |
| |
| RelocatablePCH = Record[4]; |
| if (Listener) { |
| std::string TargetTriple(BlobStart, BlobLen); |
| if (Listener->ReadTargetTriple(TargetTriple)) |
| return IgnorePCH; |
| } |
| break; |
| } |
| |
| case pch::CHAINED_METADATA: { |
| if (!First) { |
| Error("CHAINED_METADATA is not first record in block"); |
| return Failure; |
| } |
| if (Record[0] != pch::VERSION_MAJOR && !DisableValidation) { |
| Diag(Record[0] < pch::VERSION_MAJOR? diag::warn_pch_version_too_old |
| : diag::warn_pch_version_too_new); |
| return IgnorePCH; |
| } |
| |
| // Load the chained file. |
| switch(ReadPCHCore(llvm::StringRef(BlobStart, BlobLen))) { |
| case Failure: return Failure; |
| // If we have to ignore the dependency, we'll have to ignore this too. |
| case IgnorePCH: return IgnorePCH; |
| case Success: break; |
| } |
| break; |
| } |
| |
| case pch::TYPE_OFFSET: |
| if (F.LocalNumTypes != 0) { |
| Error("duplicate TYPE_OFFSET record in PCH file"); |
| return Failure; |
| } |
| F.TypeOffsets = (const uint32_t *)BlobStart; |
| F.LocalNumTypes = Record[0]; |
| break; |
| |
| case pch::DECL_OFFSET: |
| if (F.LocalNumDecls != 0) { |
| Error("duplicate DECL_OFFSET record in PCH file"); |
| return Failure; |
| } |
| F.DeclOffsets = (const uint32_t *)BlobStart; |
| F.LocalNumDecls = Record[0]; |
| break; |
| |
| case pch::TU_UPDATE_LEXICAL: { |
| DeclContextInfo Info = { |
| /* No visible information */ 0, 0, |
| reinterpret_cast<const pch::DeclID *>(BlobStart), |
| BlobLen / sizeof(pch::DeclID) |
| }; |
| DeclContextOffsets[Context->getTranslationUnitDecl()].push_back(Info); |
| break; |
| } |
| |
| case pch::REDECLS_UPDATE_LATEST: { |
| assert(Record.size() % 2 == 0 && "Expected pairs of DeclIDs"); |
| for (unsigned i = 0, e = Record.size(); i < e; i += 2) { |
| pch::DeclID First = Record[i], Latest = Record[i+1]; |
| assert((FirstLatestDeclIDs.find(First) == FirstLatestDeclIDs.end() || |
| Latest > FirstLatestDeclIDs[First]) && |
| "The new latest is supposed to come after the previous latest"); |
| FirstLatestDeclIDs[First] = Latest; |
| } |
| break; |
| } |
| |
| case pch::LANGUAGE_OPTIONS: |
| if (ParseLanguageOptions(Record) && !DisableValidation) |
| return IgnorePCH; |
| break; |
| |
| case pch::IDENTIFIER_TABLE: |
| F.IdentifierTableData = BlobStart; |
| if (Record[0]) { |
| F.IdentifierLookupTable |
| = PCHIdentifierLookupTable::Create( |
| (const unsigned char *)F.IdentifierTableData + Record[0], |
| (const unsigned char *)F.IdentifierTableData, |
| PCHIdentifierLookupTrait(*this, F.Stream)); |
| if (PP) |
| PP->getIdentifierTable().setExternalIdentifierLookup(this); |
| } |
| break; |
| |
| case pch::IDENTIFIER_OFFSET: |
| if (F.LocalNumIdentifiers != 0) { |
| Error("duplicate IDENTIFIER_OFFSET record in PCH file"); |
| return Failure; |
| } |
| F.IdentifierOffsets = (const uint32_t *)BlobStart; |
| F.LocalNumIdentifiers = Record[0]; |
| break; |
| |
| case pch::EXTERNAL_DEFINITIONS: |
| // Optimization for the first block. |
| if (ExternalDefinitions.empty()) |
| ExternalDefinitions.swap(Record); |
| else |
| ExternalDefinitions.insert(ExternalDefinitions.end(), |
| Record.begin(), Record.end()); |
| break; |
| |
| case pch::SPECIAL_TYPES: |
| // Optimization for the first block |
| if (SpecialTypes.empty()) |
| SpecialTypes.swap(Record); |
| else |
| SpecialTypes.insert(SpecialTypes.end(), Record.begin(), Record.end()); |
| break; |
| |
| case pch::STATISTICS: |
| TotalNumStatements += Record[0]; |
| TotalNumMacros += Record[1]; |
| TotalLexicalDeclContexts += Record[2]; |
| TotalVisibleDeclContexts += Record[3]; |
| break; |
| |
| case pch::TENTATIVE_DEFINITIONS: |
| // Optimization for the first block. |
| if (TentativeDefinitions.empty()) |
| TentativeDefinitions.swap(Record); |
| else |
| TentativeDefinitions.insert(TentativeDefinitions.end(), |
| Record.begin(), Record.end()); |
| break; |
| |
| case pch::UNUSED_STATIC_FUNCS: |
| // Optimization for the first block. |
| if (UnusedStaticFuncs.empty()) |
| UnusedStaticFuncs.swap(Record); |
| else |
| UnusedStaticFuncs.insert(UnusedStaticFuncs.end(), |
| Record.begin(), Record.end()); |
| break; |
| |
| case pch::WEAK_UNDECLARED_IDENTIFIERS: |
| // Optimization for the first block. |
| if (WeakUndeclaredIdentifiers.empty()) |
| WeakUndeclaredIdentifiers.swap(Record); |
| else |
| WeakUndeclaredIdentifiers.insert(WeakUndeclaredIdentifiers.end(), |
| Record.begin(), Record.end()); |
| break; |
| |
| case pch::LOCALLY_SCOPED_EXTERNAL_DECLS: |
| // Optimization for the first block. |
| if (LocallyScopedExternalDecls.empty()) |
| LocallyScopedExternalDecls.swap(Record); |
| else |
| LocallyScopedExternalDecls.insert(LocallyScopedExternalDecls.end(), |
| Record.begin(), Record.end()); |
| break; |
| |
| case pch::SELECTOR_OFFSETS: |
| F.SelectorOffsets = (const uint32_t *)BlobStart; |
| F.LocalNumSelectors = Record[0]; |
| break; |
| |
| case pch::METHOD_POOL: |
| F.SelectorLookupTableData = (const unsigned char *)BlobStart; |
| if (Record[0]) |
| F.SelectorLookupTable |
| = PCHSelectorLookupTable::Create( |
| F.SelectorLookupTableData + Record[0], |
| F.SelectorLookupTableData, |
| PCHSelectorLookupTrait(*this)); |
| TotalNumMethodPoolEntries += Record[1]; |
| break; |
| |
| case pch::REFERENCED_SELECTOR_POOL: { |
| ReferencedSelectorsData.insert(ReferencedSelectorsData.end(), |
| Record.begin(), Record.end()); |
| break; |
| } |
| |
| case pch::PP_COUNTER_VALUE: |
| if (!Record.empty() && Listener) |
| Listener->ReadCounter(Record[0]); |
| break; |
| |
| case pch::SOURCE_LOCATION_OFFSETS: |
| F.SLocOffsets = (const uint32_t *)BlobStart; |
| F.LocalNumSLocEntries = Record[0]; |
| // We cannot delay this until all PCHs are loaded, because then source |
| // location preloads would also have to be delayed. |
| TotalNumSLocEntries += F.LocalNumSLocEntries; |
| SourceMgr.PreallocateSLocEntries(this, TotalNumSLocEntries, Record[1]); |
| break; |
| |
| case pch::SOURCE_LOCATION_PRELOADS: |
| for (unsigned I = 0, N = Record.size(); I != N; ++I) { |
| PCHReadResult Result = ReadSLocEntryRecord(Record[I]); |
| if (Result != Success) |
| return Result; |
| } |
| break; |
| |
| case pch::STAT_CACHE: { |
| PCHStatCache *MyStatCache = |
| new PCHStatCache((const unsigned char *)BlobStart + Record[0], |
| (const unsigned char *)BlobStart, |
| NumStatHits, NumStatMisses); |
| FileMgr.addStatCache(MyStatCache); |
| F.StatCache = MyStatCache; |
| break; |
| } |
| |
| case pch::EXT_VECTOR_DECLS: |
| // Optimization for the first block. |
| if (ExtVectorDecls.empty()) |
| ExtVectorDecls.swap(Record); |
| else |
| ExtVectorDecls.insert(ExtVectorDecls.end(), |
| Record.begin(), Record.end()); |
| break; |
| |
| case pch::VTABLE_USES: |
| if (!VTableUses.empty()) { |
| Error("duplicate VTABLE_USES record in PCH file"); |
| return Failure; |
| } |
| VTableUses.swap(Record); |
| break; |
| |
| case pch::DYNAMIC_CLASSES: |
| if (!DynamicClasses.empty()) { |
| Error("duplicate DYNAMIC_CLASSES record in PCH file"); |
| return Failure; |
| } |
| DynamicClasses.swap(Record); |
| break; |
| |
| case pch::PENDING_IMPLICIT_INSTANTIATIONS: |
| // Optimization for the first block. |
| if (PendingImplicitInstantiations.empty()) |
| PendingImplicitInstantiations.swap(Record); |
| else |
| PendingImplicitInstantiations.insert( |
| PendingImplicitInstantiations.end(), Record.begin(), Record.end()); |
| break; |
| |
| case pch::SEMA_DECL_REFS: |
| if (!SemaDeclRefs.empty()) { |
| Error("duplicate SEMA_DECL_REFS record in PCH file"); |
| return Failure; |
| } |
| SemaDeclRefs.swap(Record); |
| break; |
| |
| case pch::ORIGINAL_FILE_NAME: |
| // The primary PCH will be the last to get here, so it will be the one |
| // that's used. |
| ActualOriginalFileName.assign(BlobStart, BlobLen); |
| OriginalFileName = ActualOriginalFileName; |
| MaybeAddSystemRootToFilename(OriginalFileName); |
| break; |
| |
| case pch::VERSION_CONTROL_BRANCH_REVISION: { |
| const std::string &CurBranch = getClangFullRepositoryVersion(); |
| llvm::StringRef PCHBranch(BlobStart, BlobLen); |
| if (llvm::StringRef(CurBranch) != PCHBranch && !DisableValidation) { |
| Diag(diag::warn_pch_different_branch) << PCHBranch << CurBranch; |
| return IgnorePCH; |
| } |
| break; |
| } |
| |
| case pch::MACRO_DEFINITION_OFFSETS: |
| F.MacroDefinitionOffsets = (const uint32_t *)BlobStart; |
| F.NumPreallocatedPreprocessingEntities = Record[0]; |
| F.LocalNumMacroDefinitions = Record[1]; |
| break; |
| } |
| First = false; |
| } |
| Error("premature end of bitstream in PCH file"); |
| return Failure; |
| } |
| |
| PCHReader::PCHReadResult PCHReader::ReadPCH(const std::string &FileName) { |
| switch(ReadPCHCore(FileName)) { |
| case Failure: return Failure; |
| case IgnorePCH: return IgnorePCH; |
| case Success: break; |
| } |
| |
| // Here comes stuff that we only do once the entire chain is loaded. |
| |
| // Allocate space for loaded identifiers, decls and types. |
| unsigned TotalNumIdentifiers = 0, TotalNumTypes = 0, TotalNumDecls = 0, |
| TotalNumPreallocatedPreprocessingEntities = 0, TotalNumMacroDefs = 0, |
| TotalNumSelectors = 0; |
| for (unsigned I = 0, N = Chain.size(); I != N; ++I) { |
| TotalNumIdentifiers += Chain[I]->LocalNumIdentifiers; |
| TotalNumTypes += Chain[I]->LocalNumTypes; |
| TotalNumDecls += Chain[I]->LocalNumDecls; |
| TotalNumPreallocatedPreprocessingEntities += |
| Chain[I]->NumPreallocatedPreprocessingEntities; |
| TotalNumMacroDefs += Chain[I]->LocalNumMacroDefinitions; |
| TotalNumSelectors += Chain[I]->LocalNumSelectors; |
| } |
| IdentifiersLoaded.resize(TotalNumIdentifiers); |
| TypesLoaded.resize(TotalNumTypes); |
| DeclsLoaded.resize(TotalNumDecls); |
| MacroDefinitionsLoaded.resize(TotalNumMacroDefs); |
| if (PP) { |
| if (TotalNumIdentifiers > 0) |
| PP->getHeaderSearchInfo().SetExternalLookup(this); |
| if (TotalNumPreallocatedPreprocessingEntities > 0) { |
| if (!PP->getPreprocessingRecord()) |
| PP->createPreprocessingRecord(); |
| PP->getPreprocessingRecord()->SetExternalSource(*this, |
| TotalNumPreallocatedPreprocessingEntities); |
| } |
| } |
| SelectorsLoaded.resize(TotalNumSelectors); |
| |
| // Check the predefines buffers. |
| if (!DisableValidation && CheckPredefinesBuffers()) |
| return IgnorePCH; |
| |
| if (PP) { |
| // Initialization of keywords and pragmas occurs before the |
| // PCH file is read, so there may be some identifiers that were |
| // loaded into the IdentifierTable before we intercepted the |
| // creation of identifiers. Iterate through the list of known |
| // identifiers and determine whether we have to establish |
| // preprocessor definitions or top-level identifier declaration |
| // chains for those identifiers. |
| // |
| // We copy the IdentifierInfo pointers to a small vector first, |
| // since de-serializing declarations or macro definitions can add |
| // new entries into the identifier table, invalidating the |
| // iterators. |
| llvm::SmallVector<IdentifierInfo *, 128> Identifiers; |
| for (IdentifierTable::iterator Id = PP->getIdentifierTable().begin(), |
| IdEnd = PP->getIdentifierTable().end(); |
| Id != IdEnd; ++Id) |
| Identifiers.push_back(Id->second); |
| // We need to search the tables in all files. |
| for (unsigned J = 0, M = Chain.size(); J != M; ++J) { |
| PCHIdentifierLookupTable *IdTable |
| = (PCHIdentifierLookupTable *)Chain[J]->IdentifierLookupTable; |
| // Not all PCH files necessarily have identifier tables, only the useful |
| // ones. |
| if (!IdTable) |
| continue; |
| for (unsigned I = 0, N = Identifiers.size(); I != N; ++I) { |
| IdentifierInfo *II = Identifiers[I]; |
| // Look in the on-disk hash tables for an entry for this identifier |
| PCHIdentifierLookupTrait Info(*this, Chain[J]->Stream, II); |
| std::pair<const char*,unsigned> Key(II->getNameStart(),II->getLength()); |
| PCHIdentifierLookupTable::iterator Pos = IdTable->find(Key, &Info); |
| if (Pos == IdTable->end()) |
| continue; |
| |
| // Dereferencing the iterator has the effect of populating the |
| // IdentifierInfo node with the various declarations it needs. |
| (void)*Pos; |
| } |
| } |
| } |
| |
| if (Context) |
| InitializeContext(*Context); |
| |
| return Success; |
| } |
| |
| PCHReader::PCHReadResult PCHReader::ReadPCHCore(llvm::StringRef FileName) { |
| Chain.push_back(new PerFileData()); |
| PerFileData &F = *Chain.back(); |
| |
| // Set the PCH file name. |
| F.FileName = FileName; |
| |
| // Open the PCH file. |
| // |
| // FIXME: This shouldn't be here, we should just take a raw_ostream. |
| std::string ErrStr; |
| F.Buffer.reset(llvm::MemoryBuffer::getFileOrSTDIN(FileName, &ErrStr)); |
| if (!F.Buffer) { |
| Error(ErrStr.c_str()); |
| return IgnorePCH; |
| } |
| |
| // Initialize the stream |
| F.StreamFile.init((const unsigned char *)F.Buffer->getBufferStart(), |
| (const unsigned char *)F.Buffer->getBufferEnd()); |
| llvm::BitstreamCursor &Stream = F.Stream; |
| Stream.init(F.StreamFile); |
| F.SizeInBits = F.Buffer->getBufferSize() * 8; |
| |
| // Sniff for the signature. |
| if (Stream.Read(8) != 'C' || |
| Stream.Read(8) != 'P' || |
| Stream.Read(8) != 'C' || |
| Stream.Read(8) != 'H') { |
| Diag(diag::err_not_a_pch_file) << FileName; |
| return Failure; |
| } |
| |
| while (!Stream.AtEndOfStream()) { |
| unsigned Code = Stream.ReadCode(); |
| |
| if (Code != llvm::bitc::ENTER_SUBBLOCK) { |
| Error("invalid record at top-level of PCH file"); |
| return Failure; |
| } |
| |
| unsigned BlockID = Stream.ReadSubBlockID(); |
| |
| // We only know the PCH subblock ID. |
| switch (BlockID) { |
| case llvm::bitc::BLOCKINFO_BLOCK_ID: |
| if (Stream.ReadBlockInfoBlock()) { |
| Error("malformed BlockInfoBlock in PCH file"); |
| return Failure; |
| } |
| break; |
| case pch::PCH_BLOCK_ID: |
| switch (ReadPCHBlock(F)) { |
| case Success: |
| break; |
| |
| case Failure: |
| return Failure; |
| |
| case IgnorePCH: |
| // FIXME: We could consider reading through to the end of this |
| // PCH block, skipping subblocks, to see if there are other |
| // PCH blocks elsewhere. |
| |
| // Clear out any preallocated source location entries, so that |
| // the source manager does not try to resolve them later. |
| SourceMgr.ClearPreallocatedSLocEntries(); |
| |
| // Remove the stat cache. |
| if (F.StatCache) |
| FileMgr.removeStatCache((PCHStatCache*)F.StatCache); |
| |
| return IgnorePCH; |
| } |
| break; |
| default: |
| if (Stream.SkipBlock()) { |
| Error("malformed block record in PCH file"); |
| return Failure; |
| } |
| break; |
| } |
| } |
| |
| return Success; |
| } |
| |
| void PCHReader::setPreprocessor(Preprocessor &pp) { |
| PP = &pp; |
| |
| unsigned TotalNum = 0; |
| for (unsigned I = 0, N = Chain.size(); I != N; ++I) |
| TotalNum += Chain[I]->NumPreallocatedPreprocessingEntities; |
| if (TotalNum) { |
| if (!PP->getPreprocessingRecord()) |
| PP->createPreprocessingRecord(); |
| PP->getPreprocessingRecord()->SetExternalSource(*this, TotalNum); |
| } |
| } |
| |
| void PCHReader::InitializeContext(ASTContext &Ctx) { |
| Context = &Ctx; |
| assert(Context && "Passed null context!"); |
| |
| assert(PP && "Forgot to set Preprocessor ?"); |
| PP->getIdentifierTable().setExternalIdentifierLookup(this); |
| PP->getHeaderSearchInfo().SetExternalLookup(this); |
| PP->setExternalSource(this); |
| |
| // Load the translation unit declaration |
| GetTranslationUnitDecl(); |
| |
| // Load the special types. |
| Context->setBuiltinVaListType( |
| GetType(SpecialTypes[pch::SPECIAL_TYPE_BUILTIN_VA_LIST])); |
| if (unsigned Id = SpecialTypes[pch::SPECIAL_TYPE_OBJC_ID]) |
| Context->setObjCIdType(GetType(Id)); |
| if (unsigned Sel = SpecialTypes[pch::SPECIAL_TYPE_OBJC_SELECTOR]) |
| Context->setObjCSelType(GetType(Sel)); |
| if (unsigned Proto = SpecialTypes[pch::SPECIAL_TYPE_OBJC_PROTOCOL]) |
| Context->setObjCProtoType(GetType(Proto)); |
| if (unsigned Class = SpecialTypes[pch::SPECIAL_TYPE_OBJC_CLASS]) |
| Context->setObjCClassType(GetType(Class)); |
| |
| if (unsigned String = SpecialTypes[pch::SPECIAL_TYPE_CF_CONSTANT_STRING]) |
| Context->setCFConstantStringType(GetType(String)); |
| if (unsigned FastEnum |
| = SpecialTypes[pch::SPECIAL_TYPE_OBJC_FAST_ENUMERATION_STATE]) |
| Context->setObjCFastEnumerationStateType(GetType(FastEnum)); |
| if (unsigned File = SpecialTypes[pch::SPECIAL_TYPE_FILE]) { |
| QualType FileType = GetType(File); |
| if (FileType.isNull()) { |
| Error("FILE type is NULL"); |
| return; |
| } |
| if (const TypedefType *Typedef = FileType->getAs<TypedefType>()) |
| Context->setFILEDecl(Typedef->getDecl()); |
| else { |
| const TagType *Tag = FileType->getAs<TagType>(); |
| if (!Tag) { |
| Error("Invalid FILE type in PCH file"); |
| return; |
| } |
| Context->setFILEDecl(Tag->getDecl()); |
| } |
| } |
| if (unsigned Jmp_buf = SpecialTypes[pch::SPECIAL_TYPE_jmp_buf]) { |
| QualType Jmp_bufType = GetType(Jmp_buf); |
| if (Jmp_bufType.isNull()) { |
| Error("jmp_bug type is NULL"); |
| return; |
| } |
| if (const TypedefType *Typedef = Jmp_bufType->getAs<TypedefType>()) |
| Context->setjmp_bufDecl(Typedef->getDecl()); |
| else { |
| const TagType *Tag = Jmp_bufType->getAs<TagType>(); |
| if (!Tag) { |
| Error("Invalid jmp_bug type in PCH file"); |
| return; |
| } |
| Context->setjmp_bufDecl(Tag->getDecl()); |
| } |
| } |
| if (unsigned Sigjmp_buf = SpecialTypes[pch::SPECIAL_TYPE_sigjmp_buf]) { |
| QualType Sigjmp_bufType = GetType(Sigjmp_buf); |
| if (Sigjmp_bufType.isNull()) { |
| Error("sigjmp_buf type is NULL"); |
| return; |
| } |
| if (const TypedefType *Typedef = Sigjmp_bufType->getAs<TypedefType>()) |
| Context->setsigjmp_bufDecl(Typedef->getDecl()); |
| else { |
| const TagType *Tag = Sigjmp_bufType->getAs<TagType>(); |
| assert(Tag && "Invalid sigjmp_buf type in PCH file"); |
| Context->setsigjmp_bufDecl(Tag->getDecl()); |
| } |
| } |
| if (unsigned ObjCIdRedef |
| = SpecialTypes[pch::SPECIAL_TYPE_OBJC_ID_REDEFINITION]) |
| Context->ObjCIdRedefinitionType = GetType(ObjCIdRedef); |
| if (unsigned ObjCClassRedef |
| = SpecialTypes[pch::SPECIAL_TYPE_OBJC_CLASS_REDEFINITION]) |
| Context->ObjCClassRedefinitionType = GetType(ObjCClassRedef); |
| if (unsigned String = SpecialTypes[pch::SPECIAL_TYPE_BLOCK_DESCRIPTOR]) |
| Context->setBlockDescriptorType(GetType(String)); |
| if (unsigned String |
| = SpecialTypes[pch::SPECIAL_TYPE_BLOCK_EXTENDED_DESCRIPTOR]) |
| Context->setBlockDescriptorExtendedType(GetType(String)); |
| if (unsigned ObjCSelRedef |
| = SpecialTypes[pch::SPECIAL_TYPE_OBJC_SEL_REDEFINITION]) |
| Context->ObjCSelRedefinitionType = GetType(ObjCSelRedef); |
| if (unsigned String = SpecialTypes[pch::SPECIAL_TYPE_NS_CONSTANT_STRING]) |
| Context->setNSConstantStringType(GetType(String)); |
| |
| if (SpecialTypes[pch::SPECIAL_TYPE_INT128_INSTALLED]) |
| Context->setInt128Installed(); |
| } |
| |
| /// \brief Retrieve the name of the original source file name |
| /// directly from the PCH file, without actually loading the PCH |
| /// file. |
| std::string PCHReader::getOriginalSourceFile(const std::string &PCHFileName, |
| Diagnostic &Diags) { |
| // Open the PCH file. |
| std::string ErrStr; |
| llvm::OwningPtr<llvm::MemoryBuffer> Buffer; |
| Buffer.reset(llvm::MemoryBuffer::getFile(PCHFileName.c_str(), &ErrStr)); |
| if (!Buffer) { |
| Diags.Report(diag::err_fe_unable_to_read_pch_file) << ErrStr; |
| return std::string(); |
| } |
| |
| // Initialize the stream |
| llvm::BitstreamReader StreamFile; |
| llvm::BitstreamCursor Stream; |
| StreamFile.init((const unsigned char *)Buffer->getBufferStart(), |
| (const unsigned char *)Buffer->getBufferEnd()); |
| Stream.init(StreamFile); |
| |
| // Sniff for the signature. |
| if (Stream.Read(8) != 'C' || |
| Stream.Read(8) != 'P' || |
| Stream.Read(8) != 'C' || |
| Stream.Read(8) != 'H') { |
| Diags.Report(diag::err_fe_not_a_pch_file) << PCHFileName; |
| return std::string(); |
| } |
| |
| RecordData Record; |
| while (!Stream.AtEndOfStream()) { |
| unsigned Code = Stream.ReadCode(); |
| |
| if (Code == llvm::bitc::ENTER_SUBBLOCK) { |
| unsigned BlockID = Stream.ReadSubBlockID(); |
| |
| // We only know the PCH subblock ID. |
| switch (BlockID) { |
| case pch::PCH_BLOCK_ID: |
| if (Stream.EnterSubBlock(pch::PCH_BLOCK_ID)) { |
| Diags.Report(diag::err_fe_pch_malformed_block) << PCHFileName; |
| return std::string(); |
| } |
| break; |
| |
| default: |
| if (Stream.SkipBlock()) { |
| Diags.Report(diag::err_fe_pch_malformed_block) << PCHFileName; |
| return std::string(); |
| } |
| break; |
| } |
| continue; |
| } |
| |
| if (Code == llvm::bitc::END_BLOCK) { |
| if (Stream.ReadBlockEnd()) { |
| Diags.Report(diag::err_fe_pch_error_at_end_block) << PCHFileName; |
| return std::string(); |
| } |
| continue; |
| } |
| |
| if (Code == llvm::bitc::DEFINE_ABBREV) { |
| Stream.ReadAbbrevRecord(); |
| continue; |
| } |
| |
| Record.clear(); |
| const char *BlobStart = 0; |
| unsigned BlobLen = 0; |
| if (Stream.ReadRecord(Code, Record, &BlobStart, &BlobLen) |
| == pch::ORIGINAL_FILE_NAME) |
| return std::string(BlobStart, BlobLen); |
| } |
| |
| return std::string(); |
| } |
| |
| /// \brief Parse the record that corresponds to a LangOptions data |
| /// structure. |
| /// |
| /// This routine compares the language options used to generate the |
| /// PCH file against the language options set for the current |
| /// compilation. For each option, we classify differences between the |
| /// two compiler states as either "benign" or "important". Benign |
| /// differences don't matter, and we accept them without complaint |
| /// (and without modifying the language options). Differences between |
| /// the states for important options cause the PCH file to be |
| /// unusable, so we emit a warning and return true to indicate that |
| /// there was an error. |
| /// |
| /// \returns true if the PCH file is unacceptable, false otherwise. |
| bool PCHReader::ParseLanguageOptions( |
| const llvm::SmallVectorImpl<uint64_t> &Record) { |
| if (Listener) { |
| LangOptions LangOpts; |
| |
| #define PARSE_LANGOPT(Option) \ |
| LangOpts.Option = Record[Idx]; \ |
| ++Idx |
| |
| unsigned Idx = 0; |
| PARSE_LANGOPT(Trigraphs); |
| PARSE_LANGOPT(BCPLComment); |
| PARSE_LANGOPT(DollarIdents); |
| PARSE_LANGOPT(AsmPreprocessor); |
| PARSE_LANGOPT(GNUMode); |
| PARSE_LANGOPT(GNUKeywords); |
| PARSE_LANGOPT(ImplicitInt); |
| PARSE_LANGOPT(Digraphs); |
| PARSE_LANGOPT(HexFloats); |
| PARSE_LANGOPT(C99); |
| PARSE_LANGOPT(Microsoft); |
| PARSE_LANGOPT(CPlusPlus); |
| PARSE_LANGOPT(CPlusPlus0x); |
| PARSE_LANGOPT(CXXOperatorNames); |
| PARSE_LANGOPT(ObjC1); |
| PARSE_LANGOPT(ObjC2); |
| PARSE_LANGOPT(ObjCNonFragileABI); |
| PARSE_LANGOPT(ObjCNonFragileABI2); |
| PARSE_LANGOPT(NoConstantCFStrings); |
| PARSE_LANGOPT(PascalStrings); |
| PARSE_LANGOPT(WritableStrings); |
| PARSE_LANGOPT(LaxVectorConversions); |
| PARSE_LANGOPT(AltiVec); |
| PARSE_LANGOPT(Exceptions); |
| PARSE_LANGOPT(SjLjExceptions); |
| PARSE_LANGOPT(NeXTRuntime); |
| PARSE_LANGOPT(Freestanding); |
| PARSE_LANGOPT(NoBuiltin); |
| PARSE_LANGOPT(ThreadsafeStatics); |
| PARSE_LANGOPT(POSIXThreads); |
| PARSE_LANGOPT(Blocks); |
| PARSE_LANGOPT(EmitAllDecls); |
| PARSE_LANGOPT(MathErrno); |
| LangOpts.setSignedOverflowBehavior((LangOptions::SignedOverflowBehaviorTy) |
| Record[Idx++]); |
| PARSE_LANGOPT(HeinousExtensions); |
| PARSE_LANGOPT(Optimize); |
| PARSE_LANGOPT(OptimizeSize); |
| PARSE_LANGOPT(Static); |
| PARSE_LANGOPT(PICLevel); |
| PARSE_LANGOPT(GNUInline); |
| PARSE_LANGOPT(NoInline); |
| PARSE_LANGOPT(AccessControl); |
| PARSE_LANGOPT(CharIsSigned); |
| PARSE_LANGOPT(ShortWChar); |
| LangOpts.setGCMode((LangOptions::GCMode)Record[Idx++]); |
| LangOpts.setVisibilityMode((LangOptions::VisibilityMode)Record[Idx++]); |
| LangOpts.setStackProtectorMode((LangOptions::StackProtectorMode) |
| Record[Idx++]); |
| PARSE_LANGOPT(InstantiationDepth); |
| PARSE_LANGOPT(OpenCL); |
| PARSE_LANGOPT(CatchUndefined); |
| // FIXME: Missing ElideConstructors?! |
| #undef PARSE_LANGOPT |
| |
| return Listener->ReadLanguageOptions(LangOpts); |
| } |
| |
| return false; |
| } |
| |
| void PCHReader::ReadPreprocessedEntities() { |
| ReadDefinedMacros(); |
| } |
| |
| /// \brief Get the correct cursor and offset for loading a type. |
| PCHReader::RecordLocation PCHReader::TypeCursorForIndex(unsigned Index) { |
| PerFileData *F = 0; |
| for (unsigned I = 0, N = Chain.size(); I != N; ++I) { |
| F = Chain[N - I - 1]; |
| if (Index < F->LocalNumTypes) |
| break; |
| Index -= F->LocalNumTypes; |
| } |
| assert(F && F->LocalNumTypes > Index && "Broken chain"); |
| return RecordLocation(&F->DeclsCursor, F->TypeOffsets[Index]); |
| } |
| |
| /// \brief Read and return the type with the given index.. |
| /// |
| /// The index is the type ID, shifted and minus the number of predefs. This |
| /// routine actually reads the record corresponding to the type at the given |
| /// location. It is a helper routine for GetType, which deals with reading type |
| /// IDs. |
| QualType PCHReader::ReadTypeRecord(unsigned Index) { |
| RecordLocation Loc = TypeCursorForIndex(Index); |
| llvm::BitstreamCursor &DeclsCursor = *Loc.first; |
| |
| // Keep track of where we are in the stream, then jump back there |
| // after reading this type. |
| SavedStreamPosition SavedPosition(DeclsCursor); |
| |
| ReadingKindTracker ReadingKind(Read_Type, *this); |
| |
| // Note that we are loading a type record. |
| Deserializing AType(this); |
| |
| DeclsCursor.JumpToBit(Loc.second); |
| RecordData Record; |
| unsigned Code = DeclsCursor.ReadCode(); |
| switch ((pch::TypeCode)DeclsCursor.ReadRecord(Code, Record)) { |
| case pch::TYPE_EXT_QUAL: { |
| if (Record.size() != 2) { |
| Error("Incorrect encoding of extended qualifier type"); |
| return QualType(); |
| } |
| QualType Base = GetType(Record[0]); |
| Qualifiers Quals = Qualifiers::fromOpaqueValue(Record[1]); |
| return Context->getQualifiedType(Base, Quals); |
| } |
| |
| case pch::TYPE_COMPLEX: { |
| if (Record.size() != 1) { |
| Error("Incorrect encoding of complex type"); |
| return QualType(); |
| } |
| QualType ElemType = GetType(Record[0]); |
| return Context->getComplexType(ElemType); |
| } |
| |
| case pch::TYPE_POINTER: { |
| if (Record.size() != 1) { |
| Error("Incorrect encoding of pointer type"); |
| return QualType(); |
| } |
| QualType PointeeType = GetType(Record[0]); |
| return Context->getPointerType(PointeeType); |
| } |
| |
| case pch::TYPE_BLOCK_POINTER: { |
| if (Record.size() != 1) { |
| Error("Incorrect encoding of block pointer type"); |
| return QualType(); |
| } |
| QualType PointeeType = GetType(Record[0]); |
| return Context->getBlockPointerType(PointeeType); |
| } |
| |
| case pch::TYPE_LVALUE_REFERENCE: { |
| if (Record.size() != 1) { |
| Error("Incorrect encoding of lvalue reference type"); |
| return QualType(); |
| } |
| QualType PointeeType = GetType(Record[0]); |
| return Context->getLValueReferenceType(PointeeType); |
| } |
| |
| case pch::TYPE_RVALUE_REFERENCE: { |
| if (Record.size() != 1) { |
| Error("Incorrect encoding of rvalue reference type"); |
| return QualType(); |
| } |
| QualType PointeeType = GetType(Record[0]); |
| return Context->getRValueReferenceType(PointeeType); |
| } |
| |
| case pch::TYPE_MEMBER_POINTER: { |
| if (Record.size() != 2) { |
| Error("Incorrect encoding of member pointer type"); |
| return QualType(); |
| } |
| QualType PointeeType = GetType(Record[0]); |
| QualType ClassType = GetType(Record[1]); |
| return Context->getMemberPointerType(PointeeType, ClassType.getTypePtr()); |
| } |
| |
| case pch::TYPE_CONSTANT_ARRAY: { |
| QualType ElementType = GetType(Record[0]); |
| ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1]; |
| unsigned IndexTypeQuals = Record[2]; |
| unsigned Idx = 3; |
| llvm::APInt Size = ReadAPInt(Record, Idx); |
| return Context->getConstantArrayType(ElementType, Size, |
| ASM, IndexTypeQuals); |
| } |
| |
| case pch::TYPE_INCOMPLETE_ARRAY: { |
| QualType ElementType = GetType(Record[0]); |
| ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1]; |
| unsigned IndexTypeQuals = Record[2]; |
| return Context->getIncompleteArrayType(ElementType, ASM, IndexTypeQuals); |
| } |
| |
| case pch::TYPE_VARIABLE_ARRAY: { |
| QualType ElementType = GetType(Record[0]); |
| ArrayType::ArraySizeModifier ASM = (ArrayType::ArraySizeModifier)Record[1]; |
| unsigned IndexTypeQuals = Record[2]; |
| SourceLocation LBLoc = SourceLocation::getFromRawEncoding(Record[3]); |
| SourceLocation RBLoc = SourceLocation::getFromRawEncoding(Record[4]); |
| return Context->getVariableArrayType(ElementType, ReadExpr(DeclsCursor), |
| ASM, IndexTypeQuals, |
| SourceRange(LBLoc, RBLoc)); |
| } |
| |
| case pch::TYPE_VECTOR: { |
| if (Record.size() != 3) { |
| Error("incorrect encoding of vector type in PCH file"); |
| return QualType(); |
| } |
| |
| QualType ElementType = GetType(Record[0]); |
| unsigned NumElements = Record[1]; |
| unsigned AltiVecSpec = Record[2]; |
| return Context->getVectorType(ElementType, NumElements, |
| (VectorType::AltiVecSpecific)AltiVecSpec); |
| } |
| |
| case pch::TYPE_EXT_VECTOR: { |
| if (Record.size() != 3) { |
| Error("incorrect encoding of extended vector type in PCH file"); |
| return QualType(); |
| } |
| |
| QualType ElementType = GetType(Record[0]); |
| unsigned NumElements = Record[1]; |
| return Context->getExtVectorType(ElementType, NumElements); |
| } |
| |
| case pch::TYPE_FUNCTION_NO_PROTO: { |
| if (Record.size() != 4) { |
| Error("incorrect encoding of no-proto function type"); |
| return QualType(); |
| } |
| QualType ResultType = GetType(Record[0]); |
| FunctionType::ExtInfo Info(Record[1], Record[2], (CallingConv)Record[3]); |
| return Context->getFunctionNoProtoType(ResultType, Info); |
| } |
| |
| case pch::TYPE_FUNCTION_PROTO: { |
| QualType ResultType = GetType(Record[0]); |
| bool NoReturn = Record[1]; |
| unsigned RegParm = Record[2]; |
| CallingConv CallConv = (CallingConv)Record[3]; |
| unsigned Idx = 4; |
| unsigned NumParams = Record[Idx++]; |
| llvm::SmallVector<QualType, 16> ParamTypes; |
| for (unsigned I = 0; I != NumParams; ++I) |
| ParamTypes.push_back(GetType(Record[Idx++])); |
| bool isVariadic = Record[Idx++]; |
| unsigned Quals = Record[Idx++]; |
| bool hasExceptionSpec = Record[Idx++]; |
| bool hasAnyExceptionSpec = Record[Idx++]; |
| unsigned NumExceptions = Record[Idx++]; |
| llvm::SmallVector<QualType, 2> Exceptions; |
| for (unsigned I = 0; I != NumExceptions; ++I) |
| Exceptions.push_back(GetType(Record[Idx++])); |
| return Context->getFunctionType(ResultType, ParamTypes.data(), NumParams, |
| isVariadic, Quals, hasExceptionSpec, |
| hasAnyExceptionSpec, NumExceptions, |
| Exceptions.data(), |
| FunctionType::ExtInfo(NoReturn, RegParm, |
| CallConv)); |
| } |
| |
| case pch::TYPE_UNRESOLVED_USING: |
| return Context->getTypeDeclType( |
| cast<UnresolvedUsingTypenameDecl>(GetDecl(Record[0]))); |
| |
| case pch::TYPE_TYPEDEF: { |
| if (Record.size() != 2) { |
| Error("incorrect encoding of typedef type"); |
| return QualType(); |
| } |
| TypedefDecl *Decl = cast<TypedefDecl>(GetDecl(Record[0])); |
| QualType Canonical = GetType(Record[1]); |
| return Context->getTypedefType(Decl, Canonical); |
| } |
| |
| case pch::TYPE_TYPEOF_EXPR: |
| return Context->getTypeOfExprType(ReadExpr(DeclsCursor)); |
| |
| case pch::TYPE_TYPEOF: { |
| if (Record.size() != 1) { |
| Error("incorrect encoding of typeof(type) in PCH file"); |
| return QualType(); |
| } |
| QualType UnderlyingType = GetType(Record[0]); |
| return Context->getTypeOfType(UnderlyingType); |
| } |
| |
| case pch::TYPE_DECLTYPE: |
| return Context->getDecltypeType(ReadExpr(DeclsCursor)); |
| |
| case pch::TYPE_RECORD: { |
| if (Record.size() != 2) { |
| Error("incorrect encoding of record type"); |
| return QualType(); |
| } |
| bool IsDependent = Record[0]; |
| QualType T = Context->getRecordType(cast<RecordDecl>(GetDecl(Record[1]))); |
| T->Dependent = IsDependent; |
| return T; |
| } |
| |
| case pch::TYPE_ENUM: { |
| if (Record.size() != 2) { |
| Error("incorrect encoding of enum type"); |
| return QualType(); |
| } |
| bool IsDependent = Record[0]; |
| QualType T = Context->getEnumType(cast<EnumDecl>(GetDecl(Record[1]))); |
| T->Dependent = IsDependent; |
| return T; |
| } |
| |
| case pch::TYPE_ELABORATED: { |
| unsigned Idx = 0; |
| ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++]; |
| NestedNameSpecifier *NNS = ReadNestedNameSpecifier(Record, Idx); |
| QualType NamedType = GetType(Record[Idx++]); |
| return Context->getElaboratedType(Keyword, NNS, NamedType); |
| } |
| |
| case pch::TYPE_OBJC_INTERFACE: { |
| unsigned Idx = 0; |
| ObjCInterfaceDecl *ItfD = cast<ObjCInterfaceDecl>(GetDecl(Record[Idx++])); |
| return Context->getObjCInterfaceType(ItfD); |
| } |
| |
| case pch::TYPE_OBJC_OBJECT: { |
| unsigned Idx = 0; |
| QualType Base = GetType(Record[Idx++]); |
| unsigned NumProtos = Record[Idx++]; |
| llvm::SmallVector<ObjCProtocolDecl*, 4> Protos; |
| for (unsigned I = 0; I != NumProtos; ++I) |
| Protos.push_back(cast<ObjCProtocolDecl>(GetDecl(Record[Idx++]))); |
| return Context->getObjCObjectType(Base, Protos.data(), NumProtos); |
| } |
| |
| case pch::TYPE_OBJC_OBJECT_POINTER: { |
| unsigned Idx = 0; |
| QualType Pointee = GetType(Record[Idx++]); |
| return Context->getObjCObjectPointerType(Pointee); |
| } |
| |
| case pch::TYPE_SUBST_TEMPLATE_TYPE_PARM: { |
| unsigned Idx = 0; |
| QualType Parm = GetType(Record[Idx++]); |
| QualType Replacement = GetType(Record[Idx++]); |
| return |
| Context->getSubstTemplateTypeParmType(cast<TemplateTypeParmType>(Parm), |
| Replacement); |
| } |
| |
| case pch::TYPE_INJECTED_CLASS_NAME: { |
| CXXRecordDecl *D = cast<CXXRecordDecl>(GetDecl(Record[0])); |
| QualType TST = GetType(Record[1]); // probably derivable |
| // FIXME: ASTContext::getInjectedClassNameType is not currently suitable |
| // for PCH reading, too much interdependencies. |
| return |
| QualType(new (*Context, TypeAlignment) InjectedClassNameType(D, TST), 0); |
| } |
| |
| case pch::TYPE_TEMPLATE_TYPE_PARM: { |
| unsigned Idx = 0; |
| unsigned Depth = Record[Idx++]; |
| unsigned Index = Record[Idx++]; |
| bool Pack = Record[Idx++]; |
| IdentifierInfo *Name = GetIdentifierInfo(Record, Idx); |
| return Context->getTemplateTypeParmType(Depth, Index, Pack, Name); |
| } |
| |
| case pch::TYPE_DEPENDENT_NAME: { |
| unsigned Idx = 0; |
| ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++]; |
| NestedNameSpecifier *NNS = ReadNestedNameSpecifier(Record, Idx); |
| const IdentifierInfo *Name = this->GetIdentifierInfo(Record, Idx); |
| QualType Canon = GetType(Record[Idx++]); |
| return Context->getDependentNameType(Keyword, NNS, Name, Canon); |
| } |
| |
| case pch::TYPE_DEPENDENT_TEMPLATE_SPECIALIZATION: { |
| unsigned Idx = 0; |
| ElaboratedTypeKeyword Keyword = (ElaboratedTypeKeyword)Record[Idx++]; |
| NestedNameSpecifier *NNS = ReadNestedNameSpecifier(Record, Idx); |
| const IdentifierInfo *Name = this->GetIdentifierInfo(Record, Idx); |
| unsigned NumArgs = Record[Idx++]; |
| llvm::SmallVector<TemplateArgument, 8> Args; |
| Args.reserve(NumArgs); |
| while (NumArgs--) |
| Args.push_back(ReadTemplateArgument(DeclsCursor, Record, Idx)); |
| return Context->getDependentTemplateSpecializationType(Keyword, NNS, Name, |
| Args.size(), Args.data()); |
| } |
| |
| case pch::TYPE_DEPENDENT_SIZED_ARRAY: { |
| unsigned Idx = 0; |
| |
| // ArrayType |
| QualType ElementType = GetType(Record[Idx++]); |
| ArrayType::ArraySizeModifier ASM |
| = (ArrayType::ArraySizeModifier)Record[Idx++]; |
| unsigned IndexTypeQuals = Record[Idx++]; |
| |
| // DependentSizedArrayType |
| Expr *NumElts = ReadExpr(DeclsCursor); |
| SourceRange Brackets = ReadSourceRange(Record, Idx); |
| |
| return Context->getDependentSizedArrayType(ElementType, NumElts, ASM, |
| IndexTypeQuals, Brackets); |
| } |
| |
| case pch::TYPE_TEMPLATE_SPECIALIZATION: { |
| unsigned Idx = 0; |
| bool IsDependent = Record[Idx++]; |
| TemplateName Name = ReadTemplateName(Record, Idx); |
| llvm::SmallVector<TemplateArgument, 8> Args; |
| ReadTemplateArgumentList(Args, DeclsCursor, Record, Idx); |
| QualType Canon = GetType(Record[Idx++]); |
| QualType T; |
| if (Canon.isNull()) |
| T = Context->getCanonicalTemplateSpecializationType(Name, Args.data(), |
| Args.size()); |
| else |
| T = Context->getTemplateSpecializationType(Name, Args.data(), |
| Args.size(), Canon); |
| T->Dependent = IsDependent; |
| return T; |
| } |
| } |
| // Suppress a GCC warning |
| return QualType(); |
| } |
| |
| namespace { |
| |
| class TypeLocReader : public TypeLocVisitor<TypeLocReader> { |
| PCHReader &Reader; |
| llvm::BitstreamCursor &DeclsCursor; |
| const PCHReader::RecordData &Record; |
| unsigned &Idx; |
| |
| public: |
| TypeLocReader(PCHReader &Reader, llvm::BitstreamCursor &Cursor, |
| const PCHReader::RecordData &Record, unsigned &Idx) |
| : Reader(Reader), DeclsCursor(Cursor), Record(Record), Idx(Idx) { } |
| |
| // We want compile-time assurance that we've enumerated all of |
| // these, so unfortunately we have to declare them first, then |
| // define them out-of-line. |
| #define ABSTRACT_TYPELOC(CLASS, PARENT) |
| #define TYPELOC(CLASS, PARENT) \ |
| void Visit##CLASS##TypeLoc(CLASS##TypeLoc TyLoc); |
| #include "clang/AST/TypeLocNodes.def" |
| |
| void VisitFunctionTypeLoc(FunctionTypeLoc); |
| void VisitArrayTypeLoc(ArrayTypeLoc); |
| }; |
| |
| } |
| |
| void TypeLocReader::VisitQualifiedTypeLoc(QualifiedTypeLoc TL) { |
| // nothing to do |
| } |
| void TypeLocReader::VisitBuiltinTypeLoc(BuiltinTypeLoc TL) { |
| TL.setBuiltinLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| if (TL.needsExtraLocalData()) { |
| TL.setWrittenTypeSpec(static_cast<DeclSpec::TST>(Record[Idx++])); |
| TL.setWrittenSignSpec(static_cast<DeclSpec::TSS>(Record[Idx++])); |
| TL.setWrittenWidthSpec(static_cast<DeclSpec::TSW>(Record[Idx++])); |
| TL.setModeAttr(Record[Idx++]); |
| } |
| } |
| void TypeLocReader::VisitComplexTypeLoc(ComplexTypeLoc TL) { |
| TL.setNameLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| } |
| void TypeLocReader::VisitPointerTypeLoc(PointerTypeLoc TL) { |
| TL.setStarLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| } |
| void TypeLocReader::VisitBlockPointerTypeLoc(BlockPointerTypeLoc TL) { |
| TL.setCaretLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| } |
| void TypeLocReader::VisitLValueReferenceTypeLoc(LValueReferenceTypeLoc TL) { |
| TL.setAmpLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| } |
| void TypeLocReader::VisitRValueReferenceTypeLoc(RValueReferenceTypeLoc TL) { |
| TL.setAmpAmpLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| } |
| void TypeLocReader::VisitMemberPointerTypeLoc(MemberPointerTypeLoc TL) { |
| TL.setStarLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| } |
| void TypeLocReader::VisitArrayTypeLoc(ArrayTypeLoc TL) { |
| TL.setLBracketLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| TL.setRBracketLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| if (Record[Idx++]) |
| TL.setSizeExpr(Reader.ReadExpr(DeclsCursor)); |
| else |
| TL.setSizeExpr(0); |
| } |
| void TypeLocReader::VisitConstantArrayTypeLoc(ConstantArrayTypeLoc TL) { |
| VisitArrayTypeLoc(TL); |
| } |
| void TypeLocReader::VisitIncompleteArrayTypeLoc(IncompleteArrayTypeLoc TL) { |
| VisitArrayTypeLoc(TL); |
| } |
| void TypeLocReader::VisitVariableArrayTypeLoc(VariableArrayTypeLoc TL) { |
| VisitArrayTypeLoc(TL); |
| } |
| void TypeLocReader::VisitDependentSizedArrayTypeLoc( |
| DependentSizedArrayTypeLoc TL) { |
| VisitArrayTypeLoc(TL); |
| } |
| void TypeLocReader::VisitDependentSizedExtVectorTypeLoc( |
| DependentSizedExtVectorTypeLoc TL) { |
| TL.setNameLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| } |
| void TypeLocReader::VisitVectorTypeLoc(VectorTypeLoc TL) { |
| TL.setNameLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| } |
| void TypeLocReader::VisitExtVectorTypeLoc(ExtVectorTypeLoc TL) { |
| TL.setNameLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| } |
| void TypeLocReader::VisitFunctionTypeLoc(FunctionTypeLoc TL) { |
| TL.setLParenLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| TL.setRParenLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) { |
| TL.setArg(i, cast_or_null<ParmVarDecl>(Reader.GetDecl(Record[Idx++]))); |
| } |
| } |
| void TypeLocReader::VisitFunctionProtoTypeLoc(FunctionProtoTypeLoc TL) { |
| VisitFunctionTypeLoc(TL); |
| } |
| void TypeLocReader::VisitFunctionNoProtoTypeLoc(FunctionNoProtoTypeLoc TL) { |
| VisitFunctionTypeLoc(TL); |
| } |
| void TypeLocReader::VisitUnresolvedUsingTypeLoc(UnresolvedUsingTypeLoc TL) { |
| TL.setNameLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| } |
| void TypeLocReader::VisitTypedefTypeLoc(TypedefTypeLoc TL) { |
| TL.setNameLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| } |
| void TypeLocReader::VisitTypeOfExprTypeLoc(TypeOfExprTypeLoc TL) { |
| TL.setTypeofLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| TL.setLParenLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| TL.setRParenLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| } |
| void TypeLocReader::VisitTypeOfTypeLoc(TypeOfTypeLoc TL) { |
| TL.setTypeofLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| TL.setLParenLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| TL.setRParenLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| TL.setUnderlyingTInfo(Reader.GetTypeSourceInfo(DeclsCursor, Record, Idx)); |
| } |
| void TypeLocReader::VisitDecltypeTypeLoc(DecltypeTypeLoc TL) { |
| TL.setNameLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| } |
| void TypeLocReader::VisitRecordTypeLoc(RecordTypeLoc TL) { |
| TL.setNameLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| } |
| void TypeLocReader::VisitEnumTypeLoc(EnumTypeLoc TL) { |
| TL.setNameLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| } |
| void TypeLocReader::VisitTemplateTypeParmTypeLoc(TemplateTypeParmTypeLoc TL) { |
| TL.setNameLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| } |
| void TypeLocReader::VisitSubstTemplateTypeParmTypeLoc( |
| SubstTemplateTypeParmTypeLoc TL) { |
| TL.setNameLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| } |
| void TypeLocReader::VisitTemplateSpecializationTypeLoc( |
| TemplateSpecializationTypeLoc TL) { |
| TL.setTemplateNameLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| TL.setLAngleLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| TL.setRAngleLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) |
| TL.setArgLocInfo(i, |
| Reader.GetTemplateArgumentLocInfo(TL.getTypePtr()->getArg(i).getKind(), |
| DeclsCursor, Record, Idx)); |
| } |
| void TypeLocReader::VisitElaboratedTypeLoc(ElaboratedTypeLoc TL) { |
| TL.setKeywordLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| TL.setQualifierRange(Reader.ReadSourceRange(Record, Idx)); |
| } |
| void TypeLocReader::VisitInjectedClassNameTypeLoc(InjectedClassNameTypeLoc TL) { |
| TL.setNameLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| } |
| void TypeLocReader::VisitDependentNameTypeLoc(DependentNameTypeLoc TL) { |
| TL.setKeywordLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| TL.setQualifierRange(Reader.ReadSourceRange(Record, Idx)); |
| TL.setNameLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| } |
| void TypeLocReader::VisitDependentTemplateSpecializationTypeLoc( |
| DependentTemplateSpecializationTypeLoc TL) { |
| TL.setKeywordLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| TL.setQualifierRange(Reader.ReadSourceRange(Record, Idx)); |
| TL.setNameLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| TL.setLAngleLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| TL.setRAngleLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| for (unsigned I = 0, E = TL.getNumArgs(); I != E; ++I) |
| TL.setArgLocInfo(I, |
| Reader.GetTemplateArgumentLocInfo(TL.getTypePtr()->getArg(I).getKind(), |
| DeclsCursor, Record, Idx)); |
| } |
| void TypeLocReader::VisitObjCInterfaceTypeLoc(ObjCInterfaceTypeLoc TL) { |
| TL.setNameLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| } |
| void TypeLocReader::VisitObjCObjectTypeLoc(ObjCObjectTypeLoc TL) { |
| TL.setHasBaseTypeAsWritten(Record[Idx++]); |
| TL.setLAngleLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| TL.setRAngleLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| for (unsigned i = 0, e = TL.getNumProtocols(); i != e; ++i) |
| TL.setProtocolLoc(i, SourceLocation::getFromRawEncoding(Record[Idx++])); |
| } |
| void TypeLocReader::VisitObjCObjectPointerTypeLoc(ObjCObjectPointerTypeLoc TL) { |
| TL.setStarLoc(SourceLocation::getFromRawEncoding(Record[Idx++])); |
| } |
| |
| TypeSourceInfo *PCHReader::GetTypeSourceInfo(llvm::BitstreamCursor &DeclsCursor, |
| const RecordData &Record, |
| unsigned &Idx) { |
| QualType InfoTy = GetType(Record[Idx++]); |
| if (InfoTy.isNull()) |
| return 0; |
| |
| TypeSourceInfo *TInfo = getContext()->CreateTypeSourceInfo(InfoTy); |
| TypeLocReader TLR(*this, DeclsCursor, Record, Idx); |
| for (TypeLoc TL = TInfo->getTypeLoc(); !TL.isNull(); TL = TL.getNextTypeLoc()) |
| TLR.Visit(TL); |
| return TInfo; |
| } |
| |
| QualType PCHReader::GetType(pch::TypeID ID) { |
| unsigned FastQuals = ID & Qualifiers::FastMask; |
| unsigned Index = ID >> Qualifiers::FastWidth; |
| |
| if (Index < pch::NUM_PREDEF_TYPE_IDS) { |
| QualType T; |
| switch ((pch::PredefinedTypeIDs)Index) { |
| case pch::PREDEF_TYPE_NULL_ID: return QualType(); |
| case pch::PREDEF_TYPE_VOID_ID: T = Context->VoidTy; break; |
| case pch::PREDEF_TYPE_BOOL_ID: T = Context->BoolTy; break; |
| |
| case pch::PREDEF_TYPE_CHAR_U_ID: |
| case pch::PREDEF_TYPE_CHAR_S_ID: |
| // FIXME: Check that the signedness of CharTy is correct! |
| T = Context->CharTy; |
| break; |
| |
| case pch::PREDEF_TYPE_UCHAR_ID: T = Context->UnsignedCharTy; break; |
| case pch::PREDEF_TYPE_USHORT_ID: T = Context->UnsignedShortTy; break; |
| case pch::PREDEF_TYPE_UINT_ID: T = Context->UnsignedIntTy; break; |
| case pch::PREDEF_TYPE_ULONG_ID: T = Context->UnsignedLongTy; break; |
| case pch::PREDEF_TYPE_ULONGLONG_ID: T = Context->UnsignedLongLongTy; break; |
| case pch::PREDEF_TYPE_UINT128_ID: T = Context->UnsignedInt128Ty; break; |
| case pch::PREDEF_TYPE_SCHAR_ID: T = Context->SignedCharTy; break; |
| case pch::PREDEF_TYPE_WCHAR_ID: T = Context->WCharTy; break; |
| case pch::PREDEF_TYPE_SHORT_ID: T = Context->ShortTy; break; |
| case pch::PREDEF_TYPE_INT_ID: T = Context->IntTy; break; |
| case pch::PREDEF_TYPE_LONG_ID: T = Context->LongTy; break; |
| case pch::PREDEF_TYPE_LONGLONG_ID: T = Context->LongLongTy; break; |
| case pch::PREDEF_TYPE_INT128_ID: T = Context->Int128Ty; break; |
| case pch::PREDEF_TYPE_FLOAT_ID: T = Context->FloatTy; break; |
| case pch::PREDEF_TYPE_DOUBLE_ID: T = Context->DoubleTy; break; |
| case pch::PREDEF_TYPE_LONGDOUBLE_ID: T = Context->LongDoubleTy; break; |
| case pch::PREDEF_TYPE_OVERLOAD_ID: T = Context->OverloadTy; break; |
| case pch::PREDEF_TYPE_DEPENDENT_ID: T = Context->DependentTy; break; |
| case pch::PREDEF_TYPE_NULLPTR_ID: T = Context->NullPtrTy; break; |
| case pch::PREDEF_TYPE_CHAR16_ID: T = Context->Char16Ty; break; |
| case pch::PREDEF_TYPE_CHAR32_ID: T = Context->Char32Ty; break; |
| case pch::PREDEF_TYPE_OBJC_ID: T = Context->ObjCBuiltinIdTy; break; |
| case pch::PREDEF_TYPE_OBJC_CLASS: T = Context->ObjCBuiltinClassTy; break; |
| case pch::PREDEF_TYPE_OBJC_SEL: T = Context->ObjCBuiltinSelTy; break; |
| } |
| |
| assert(!T.isNull() && "Unknown predefined type"); |
| return T.withFastQualifiers(FastQuals); |
| } |
| |
| Index -= pch::NUM_PREDEF_TYPE_IDS; |
| assert(Index < TypesLoaded.size() && "Type index out-of-range"); |
| if (TypesLoaded[Index].isNull()) { |
| TypesLoaded[Index] = ReadTypeRecord(Index); |
| TypesLoaded[Index]->setFromPCH(); |
| if (DeserializationListener) |
| DeserializationListener->TypeRead(ID >> Qualifiers::FastWidth, |
| TypesLoaded[Index]); |
| } |
| |
| return TypesLoaded[Index].withFastQualifiers(FastQuals); |
| } |
| |
| TemplateArgumentLocInfo |
| PCHReader::GetTemplateArgumentLocInfo(TemplateArgument::ArgKind Kind, |
| llvm::BitstreamCursor &DeclsCursor, |
| const RecordData &Record, |
| unsigned &Index) { |
| switch (Kind) { |
| case TemplateArgument::Expression: |
| return ReadExpr(DeclsCursor); |
| case TemplateArgument::Type: |
| return GetTypeSourceInfo(DeclsCursor, Record, Index); |
| case TemplateArgument::Template: { |
| SourceRange QualifierRange = ReadSourceRange(Record, Index); |
| SourceLocation TemplateNameLoc = ReadSourceLocation(Record, Index); |
| return TemplateArgumentLocInfo(QualifierRange, TemplateNameLoc); |
| } |
| case TemplateArgument::Null: |
| case TemplateArgument::Integral: |
| case TemplateArgument::Declaration: |
| case TemplateArgument::Pack: |
| return TemplateArgumentLocInfo(); |
| } |
| llvm_unreachable("unexpected template argument loc"); |
| return TemplateArgumentLocInfo(); |
| } |
| |
| TemplateArgumentLoc |
| PCHReader::ReadTemplateArgumentLoc(llvm::BitstreamCursor &DeclsCursor, |
| const RecordData &Record, unsigned &Index) { |
| TemplateArgument Arg = ReadTemplateArgument(DeclsCursor, Record, Index); |
| |
| if (Arg.getKind() == TemplateArgument::Expression) { |
| if (Record[Index++]) // bool InfoHasSameExpr. |
| return TemplateArgumentLoc(Arg, TemplateArgumentLocInfo(Arg.getAsExpr())); |
| } |
| return TemplateArgumentLoc(Arg, GetTemplateArgumentLocInfo(Arg.getKind(), |
| DeclsCursor, |
| Record, Index)); |
| } |
| |
| Decl *PCHReader::GetExternalDecl(uint32_t ID) { |
| return GetDecl(ID); |
| } |
| |
| TranslationUnitDecl *PCHReader::GetTranslationUnitDecl() { |
| if (!DeclsLoaded[0]) { |
| ReadDeclRecord(0, 0); |
| if (DeserializationListener) |
| DeserializationListener->DeclRead(1, DeclsLoaded[0]); |
| } |
| |
| return cast<TranslationUnitDecl>(DeclsLoaded[0]); |
| } |
| |
| Decl *PCHReader::GetDecl(pch::DeclID ID) { |
| if (ID == 0) |
| return 0; |
| |
| if (ID > DeclsLoaded.size()) { |
| Error("declaration ID out-of-range for PCH file"); |
| return 0; |
| } |
| |
| unsigned Index = ID - 1; |
| if (!DeclsLoaded[Index]) { |
| ReadDeclRecord(Index, ID); |
| if (DeserializationListener) |
| DeserializationListener->DeclRead(ID, DeclsLoaded[Index]); |
| } |
| |
| return DeclsLoaded[Index]; |
| } |
| |
| /// \brief Resolve the offset of a statement into a statement. |
| /// |
| /// This operation will read a new statement from the external |
| /// source each time it is called, and is meant to be used via a |
| /// LazyOffsetPtr (which is used by Decls for the body of functions, etc). |
| Stmt *PCHReader::GetExternalDeclStmt(uint64_t Offset) { |
| // Offset here is a global offset across the entire chain. |
| for (unsigned I = 0, N = Chain.size(); I != N; ++I) { |
| PerFileData &F = *Chain[N - I - 1]; |
| if (Offset < F.SizeInBits) { |
| // Since we know that this statement is part of a decl, make sure to use |
| // the decl cursor to read it. |
| F.DeclsCursor.JumpToBit(Offset); |
| return ReadStmtFromStream(F.DeclsCursor); |
| } |
| Offset -= F.SizeInBits; |
| } |
| llvm_unreachable("Broken chain"); |
| } |
| |
| bool PCHReader::FindExternalLexicalDecls(const DeclContext *DC, |
| llvm::SmallVectorImpl<Decl*> &Decls) { |
| assert(DC->hasExternalLexicalStorage() && |
| "DeclContext has no lexical decls in storage"); |
| |
| // There might be lexical decls in multiple parts of the chain, for the TU |
| // at least. |
| DeclContextInfos &Infos = DeclContextOffsets[DC]; |
| for (DeclContextInfos::iterator I = Infos.begin(), E = Infos.end(); |
| I != E; ++I) { |
| // IDs can be 0 if this context doesn't contain declarations. |
| if (!I->LexicalDecls) |
| continue; |
| |
| // Load all of the declaration IDs |
| for (const pch::DeclID *ID = I->LexicalDecls, |
| *IDE = ID + I->NumLexicalDecls; |
| ID != IDE; ++ID) |
| Decls.push_back(GetDecl(*ID)); |
| } |
| |
| ++NumLexicalDeclContextsRead; |
| return false; |
| } |
| |
| DeclContext::lookup_result |
| PCHReader::FindExternalVisibleDeclsByName(const DeclContext *DC, |
| DeclarationName Name) { |
| assert(DC->hasExternalVisibleStorage() && |
| "DeclContext has no visible decls in storage"); |
| |
| llvm::SmallVector<VisibleDeclaration, 64> Decls; |
| // There might be lexical decls in multiple parts of the chain, for the TU |
| // and namespaces. |
| DeclContextInfos &Infos = DeclContextOffsets[DC]; |
| for (DeclContextInfos::iterator I = Infos.begin(), E = Infos.end(); |
| I != E; ++I) { |
| uint64_t Offset = I->OffsetToVisibleDecls; |
| if (Offset == 0) |
| continue; |
| |
| llvm::BitstreamCursor &DeclsCursor = *I->Stream; |
| |
| // Keep track of where we are in the stream, then jump back there |
| // after reading this context. |
| SavedStreamPosition SavedPosition(DeclsCursor); |
| |
| // Load the record containing all of the declarations visible in |
| // this context. |
| DeclsCursor.JumpToBit(Offset); |
| RecordData Record; |
| unsigned Code = DeclsCursor.ReadCode(); |
| unsigned RecCode = DeclsCursor.ReadRecord(Code, Record); |
| if (RecCode != pch::DECL_CONTEXT_VISIBLE) { |
| Error("Expected visible block"); |
| return DeclContext::lookup_result(DeclContext::lookup_iterator(), |
| DeclContext::lookup_iterator()); |
| } |
| |
| if (Record.empty()) |
| continue; |
| |
| unsigned Idx = 0; |
| while (Idx < Record.size()) { |
| Decls.push_back(VisibleDeclaration()); |
| Decls.back().Name = ReadDeclarationName(Record, Idx); |
| |
| unsigned Size = Record[Idx++]; |
| llvm::SmallVector<unsigned, 4> &LoadedDecls = Decls.back().Declarations; |
| LoadedDecls.reserve(Size); |
| for (unsigned J = 0; J < Size; ++J) |
| LoadedDecls.push_back(Record[Idx++]); |
| } |
| } |
| |
| ++NumVisibleDeclContextsRead; |
| |
| SetExternalVisibleDecls(DC, Decls); |
| return const_cast<DeclContext*>(DC)->lookup(Name); |
| } |
| |
| void PCHReader::PassInterestingDeclsToConsumer() { |
| assert(Consumer); |
| while (!InterestingDecls.empty()) { |
| DeclGroupRef DG(InterestingDecls.front()); |
| InterestingDecls.pop_front(); |
| Consumer->HandleTopLevelDecl(DG); |
| } |
| } |
| |
| void PCHReader::StartTranslationUnit(ASTConsumer *Consumer) { |
| this->Consumer = Consumer; |
| |
| if (!Consumer) |
| return; |
| |
| for (unsigned I = 0, N = ExternalDefinitions.size(); I != N; ++I) { |
| // Force deserialization of this decl, which will cause it to be queued for |
| // passing to the consumer. |
| GetDecl(ExternalDefinitions[I]); |
| } |
| |
| PassInterestingDeclsToConsumer(); |
| } |
| |
| void PCHReader::PrintStats() { |
| std::fprintf(stderr, "*** PCH Statistics:\n"); |
| |
| unsigned NumTypesLoaded |
| = TypesLoaded.size() - std::count(TypesLoaded.begin(), TypesLoaded.end(), |
| QualType()); |
| unsigned NumDeclsLoaded |
| = DeclsLoaded.size() - std::count(DeclsLoaded.begin(), DeclsLoaded.end(), |
| (Decl *)0); |
| unsigned NumIdentifiersLoaded |
| = IdentifiersLoaded.size() - std::count(IdentifiersLoaded.begin(), |
| IdentifiersLoaded.end(), |
| (IdentifierInfo *)0); |
| unsigned NumSelectorsLoaded |
| = SelectorsLoaded.size() - std::count(SelectorsLoaded.begin(), |
| SelectorsLoaded.end(), |
| Selector()); |
| |
| std::fprintf(stderr, " %u stat cache hits\n", NumStatHits); |
| std::fprintf(stderr, " %u stat cache misses\n", NumStatMisses); |
| if (TotalNumSLocEntries) |
| std::fprintf(stderr, " %u/%u source location entries read (%f%%)\n", |
| NumSLocEntriesRead, TotalNumSLocEntries, |
| ((float)NumSLocEntriesRead/TotalNumSLocEntries * 100)); |
| if (!TypesLoaded.empty()) |
| std::fprintf(stderr, " %u/%u types read (%f%%)\n", |
| NumTypesLoaded, (unsigned)TypesLoaded.size(), |
| ((float)NumTypesLoaded/TypesLoaded.size() * 100)); |
| if (!DeclsLoaded.empty()) |
| std::fprintf(stderr, " %u/%u declarations read (%f%%)\n", |
| NumDeclsLoaded, (unsigned)DeclsLoaded.size(), |
| ((float)NumDeclsLoaded/DeclsLoaded.size() * 100)); |
| if (!IdentifiersLoaded.empty()) |
| std::fprintf(stderr, " %u/%u identifiers read (%f%%)\n", |
| NumIdentifiersLoaded, (unsigned)IdentifiersLoaded.size(), |
| ((float)NumIdentifiersLoaded/IdentifiersLoaded.size() * 100)); |
| if (!SelectorsLoaded.empty()) |
| std::fprintf(stderr, " %u/%u selectors read (%f%%)\n", |
| NumSelectorsLoaded, (unsigned)SelectorsLoaded.size(), |
| ((float)NumSelectorsLoaded/SelectorsLoaded.size() * 100)); |
| if (TotalNumStatements) |
| std::fprintf(stderr, " %u/%u statements read (%f%%)\n", |
| NumStatementsRead, TotalNumStatements, |
| ((float)NumStatementsRead/TotalNumStatements * 100)); |
| if (TotalNumMacros) |
| std::fprintf(stderr, " %u/%u macros read (%f%%)\n", |
| NumMacrosRead, TotalNumMacros, |
| ((float)NumMacrosRead/TotalNumMacros * 100)); |
| if (TotalLexicalDeclContexts) |
| std::fprintf(stderr, " %u/%u lexical declcontexts read (%f%%)\n", |
| NumLexicalDeclContextsRead, TotalLexicalDeclContexts, |
| ((float)NumLexicalDeclContextsRead/TotalLexicalDeclContexts |
| * 100)); |
| if (TotalVisibleDeclContexts) |
| std::fprintf(stderr, " %u/%u visible declcontexts read (%f%%)\n", |
| NumVisibleDeclContextsRead, TotalVisibleDeclContexts, |
| ((float)NumVisibleDeclContextsRead/TotalVisibleDeclContexts |
| * 100)); |
| if (TotalNumMethodPoolEntries) { |
| std::fprintf(stderr, " %u/%u method pool entries read (%f%%)\n", |
| NumMethodPoolEntriesRead, TotalNumMethodPoolEntries, |
| ((float)NumMethodPoolEntriesRead/TotalNumMethodPoolEntries |
| * 100)); |
| std::fprintf(stderr, " %u method pool misses\n", NumMethodPoolMisses); |
| } |
| std::fprintf(stderr, "\n"); |
| } |
| |
| void PCHReader::InitializeSema(Sema &S) { |
| SemaObj = &S; |
| S.ExternalSource = this; |
| |
| // Makes sure any declarations that were deserialized "too early" |
| // still get added to the identifier's declaration chains. |
| for (unsigned I = 0, N = PreloadedDecls.size(); I != N; ++I) { |
| SemaObj->TUScope->AddDecl(Action::DeclPtrTy::make(PreloadedDecls[I])); |
| SemaObj->IdResolver.AddDecl(PreloadedDecls[I]); |
| } |
| PreloadedDecls.clear(); |
| |
| // If there were any tentative definitions, deserialize them and add |
| // them to Sema's list of tentative definitions. |
| for (unsigned I = 0, N = TentativeDefinitions.size(); I != N; ++I) { |
| VarDecl *Var = cast<VarDecl>(GetDecl(TentativeDefinitions[I])); |
| SemaObj->TentativeDefinitions.push_back(Var); |
| } |
| |
| // If there were any unused static functions, deserialize them and add to |
| // Sema's list of unused static functions. |
| for (unsigned I = 0, N = UnusedStaticFuncs.size(); I != N; ++I) { |
| FunctionDecl *FD = cast<FunctionDecl>(GetDecl(UnusedStaticFuncs[I])); |
| SemaObj->UnusedStaticFuncs.push_back(FD); |
| } |
| |
| // If there were any weak undeclared identifiers, deserialize them and add to |
| // Sema's list of weak undeclared identifiers. |
| if (!WeakUndeclaredIdentifiers.empty()) { |
| unsigned Idx = 0; |
| for (unsigned I = 0, N = WeakUndeclaredIdentifiers[Idx++]; I != N; ++I) { |
| IdentifierInfo *WeakId = GetIdentifierInfo(WeakUndeclaredIdentifiers,Idx); |
| IdentifierInfo *AliasId=GetIdentifierInfo(WeakUndeclaredIdentifiers,Idx); |
| SourceLocation Loc = ReadSourceLocation(WeakUndeclaredIdentifiers, Idx); |
| bool Used = WeakUndeclaredIdentifiers[Idx++]; |
| Sema::WeakInfo WI(AliasId, Loc); |
| WI.setUsed(Used); |
| SemaObj->WeakUndeclaredIdentifiers.insert(std::make_pair(WeakId, WI)); |
| } |
| } |
| |
| // If there were any locally-scoped external declarations, |
| // deserialize them and add them to Sema's table of locally-scoped |
| // external declarations. |
| for (unsigned I = 0, N = LocallyScopedExternalDecls.size(); I != N; ++I) { |
| NamedDecl *D = cast<NamedDecl>(GetDecl(LocallyScopedExternalDecls[I])); |
| SemaObj->LocallyScopedExternalDecls[D->getDeclName()] = D; |
| } |
| |
| // If there were any ext_vector type declarations, deserialize them |
| // and add them to Sema's vector of such declarations. |
| for (unsigned I = 0, N = ExtVectorDecls.size(); I != N; ++I) |
| SemaObj->ExtVectorDecls.push_back( |
| cast<TypedefDecl>(GetDecl(ExtVectorDecls[I]))); |
| |
| // FIXME: Do VTable uses and dynamic classes deserialize too much ? |
| // Can we cut them down before writing them ? |
| |
| // If there were any VTable uses, deserialize the information and add it |
| // to Sema's vector and map of VTable uses. |
| if (!VTableUses.empty()) { |
| unsigned Idx = 0; |
| for (unsigned I = 0, N = VTableUses[Idx++]; I != N; ++I) { |
| CXXRecordDecl *Class = cast<CXXRecordDecl>(GetDecl(VTableUses[Idx++])); |
| SourceLocation Loc = ReadSourceLocation(VTableUses, Idx); |
| bool DefinitionRequired = VTableUses[Idx++]; |
| SemaObj->VTableUses.push_back(std::make_pair(Class, Loc)); |
| SemaObj->VTablesUsed[Class] = DefinitionRequired; |
| } |
| } |
| |
| // If there were any dynamic classes declarations, deserialize them |
| // and add them to Sema's vector of such declarations. |
| for (unsigned I = 0, N = DynamicClasses.size(); I != N; ++I) |
| SemaObj->DynamicClasses.push_back( |
| cast<CXXRecordDecl>(GetDecl(DynamicClasses[I]))); |
| |
| // If there were any pending implicit instantiations, deserialize them |
| // and add them to Sema's queue of such instantiations. |
| assert(PendingImplicitInstantiations.size() % 2 == 0 && |
| "Expected pairs of entries"); |
| for (unsigned Idx = 0, N = PendingImplicitInstantiations.size(); Idx < N;) { |
| ValueDecl *D=cast<ValueDecl>(GetDecl(PendingImplicitInstantiations[Idx++])); |
| SourceLocation Loc = ReadSourceLocation(PendingImplicitInstantiations, Idx); |
| SemaObj->PendingImplicitInstantiations.push_back(std::make_pair(D, Loc)); |
| } |
| |
| // Load the offsets of the declarations that Sema references. |
| // They will be lazily deserialized when needed. |
| if (!SemaDeclRefs.empty()) { |
| assert(SemaDeclRefs.size() == 2 && "More decl refs than expected!"); |
| SemaObj->StdNamespace = SemaDeclRefs[0]; |
| SemaObj->StdBadAlloc = SemaDeclRefs[1]; |
| } |
| |
| // If there are @selector references added them to its pool. This is for |
| // implementation of -Wselector. |
| if (!ReferencedSelectorsData.empty()) { |
| unsigned int DataSize = ReferencedSelectorsData.size()-1; |
| unsigned I = 0; |
| while (I < DataSize) { |
| Selector Sel = DecodeSelector(ReferencedSelectorsData[I++]); |
| SourceLocation SelLoc = |
| SourceLocation::getFromRawEncoding(ReferencedSelectorsData[I++]); |
| SemaObj->ReferencedSelectors.insert(std::make_pair(Sel, SelLoc)); |
| } |
| } |
| } |
| |
| IdentifierInfo* PCHReader::get(const char *NameStart, const char *NameEnd) { |
| // Try to find this name within our on-disk hash tables. We start with the |
| // most recent one, since that one contains the most up-to-date info. |
| for (unsigned I = 0, N = Chain.size(); I != N; ++I) { |
| PCHIdentifierLookupTable *IdTable |
| = (PCHIdentifierLookupTable *)Chain[I]->IdentifierLookupTable; |
| if (!IdTable) |
| continue; |
| std::pair<const char*, unsigned> Key(NameStart, NameEnd - NameStart); |
| PCHIdentifierLookupTable::iterator Pos = IdTable->find(Key); |
| if (Pos == IdTable->end()) |
| continue; |
| |
| // Dereferencing the iterator has the effect of building the |
| // IdentifierInfo node and populating it with the various |
| // declarations it needs. |
| return *Pos; |
| } |
| return 0; |
| } |
| |
| std::pair<ObjCMethodList, ObjCMethodList> |
| PCHReader::ReadMethodPool(Selector Sel) { |
| // Find this selector in a hash table. We want to find the most recent entry. |
| for (unsigned I = 0, N = Chain.size(); I != N; ++I) { |
| PerFileData &F = *Chain[I]; |
| if (!F.SelectorLookupTable) |
| continue; |
| |
| PCHSelectorLookupTable *PoolTable |
| = (PCHSelectorLookupTable*)F.SelectorLookupTable; |
| PCHSelectorLookupTable::iterator Pos = PoolTable->find(Sel); |
| if (Pos != PoolTable->end()) { |
| ++NumSelectorsRead; |
| // FIXME: Not quite happy with the statistics here. We probably should |
| // disable this tracking when called via LoadSelector. |
| // Also, should entries without methods count as misses? |
| ++NumMethodPoolEntriesRead; |
| PCHSelectorLookupTrait::data_type Data = *Pos; |
| if (DeserializationListener) |
| DeserializationListener->SelectorRead(Data.ID, Sel); |
| return std::make_pair(Data.Instance, Data.Factory); |
| } |
| } |
| |
| ++NumMethodPoolMisses; |
| return std::pair<ObjCMethodList, ObjCMethodList>(); |
| } |
| |
| void PCHReader::LoadSelector(Selector Sel) { |
| // It would be complicated to avoid reading the methods anyway. So don't. |
| ReadMethodPool(Sel); |
| } |
| |
| void PCHReader::SetIdentifierInfo(unsigned ID, IdentifierInfo *II) { |
| assert(ID && "Non-zero identifier ID required"); |
| assert(ID <= IdentifiersLoaded.size() && "identifier ID out of range"); |
| IdentifiersLoaded[ID - 1] = II; |
| if (DeserializationListener) |
| DeserializationListener->IdentifierRead(ID, II); |
| } |
| |
| /// \brief Set the globally-visible declarations associated with the given |
| /// identifier. |
| /// |
| /// If the PCH reader is currently in a state where the given declaration IDs |
| /// cannot safely be resolved, they are queued until it is safe to resolve |
| /// them. |
| /// |
| /// \param II an IdentifierInfo that refers to one or more globally-visible |
| /// declarations. |
| /// |
| /// \param DeclIDs the set of declaration IDs with the name @p II that are |
| /// visible at global scope. |
| /// |
| /// \param Nonrecursive should be true to indicate that the caller knows that |
| /// this call is non-recursive, and therefore the globally-visible declarations |
| /// will not be placed onto the pending queue. |
| void |
| PCHReader::SetGloballyVisibleDecls(IdentifierInfo *II, |
| const llvm::SmallVectorImpl<uint32_t> &DeclIDs, |
| bool Nonrecursive) { |
| if (NumCurrentElementsDeserializing && !Nonrecursive) { |
| PendingIdentifierInfos.push_back(PendingIdentifierInfo()); |
| PendingIdentifierInfo &PII = PendingIdentifierInfos.back(); |
| PII.II = II; |
| for (unsigned I = 0, N = DeclIDs.size(); I != N; ++I) |
| PII.DeclIDs.push_back(DeclIDs[I]); |
| return; |
| } |
| |
| for (unsigned I = 0, N = DeclIDs.size(); I != N; ++I) { |
| NamedDecl *D = cast<NamedDecl>(GetDecl(DeclIDs[I])); |
| if (SemaObj) { |
| // Introduce this declaration into the translation-unit scope |
| // and add it to the declaration chain for this identifier, so |
| // that (unqualified) name lookup will find it. |
| SemaObj->TUScope->AddDecl(Action::DeclPtrTy::make(D)); |
| SemaObj->IdResolver.AddDeclToIdentifierChain(II, D); |
| } else { |
| // Queue this declaration so that it will be added to the |
| // translation unit scope and identifier's declaration chain |
| // once a Sema object is known. |
| PreloadedDecls.push_back(D); |
| } |
| } |
| } |
| |
| IdentifierInfo *PCHReader::DecodeIdentifierInfo(unsigned ID) { |
| if (ID == 0) |
| return 0; |
| |
| if (IdentifiersLoaded.empty()) { |
| Error("no identifier table in PCH file"); |
| return 0; |
| } |
| |
| assert(PP && "Forgot to set Preprocessor ?"); |
| ID -= 1; |
| if (!IdentifiersLoaded[ID]) { |
| unsigned Index = ID; |
| const char *Str = 0; |
| for (unsigned I = 0, N = Chain.size(); I != N; ++I) { |
| PerFileData *F = Chain[N - I - 1]; |
| if (Index < F->LocalNumIdentifiers) { |
| uint32_t Offset = F->IdentifierOffsets[Index]; |
| Str = F->IdentifierTableData + Offset; |
| break; |
| } |
| Index -= F->LocalNumIdentifiers; |
| } |
| assert(Str && "Broken Chain"); |
| |
| // All of the strings in the PCH file are preceded by a 16-bit |
| // length. Extract that 16-bit length to avoid having to execute |
| // strlen(). |
| // NOTE: 'StrLenPtr' is an 'unsigned char*' so that we load bytes as |
| // unsigned integers. This is important to avoid integer overflow when |
| // we cast them to 'unsigned'. |
| const unsigned char *StrLenPtr = (const unsigned char*) Str - 2; |
| unsigned StrLen = (((unsigned) StrLenPtr[0]) |
| | (((unsigned) StrLenPtr[1]) << 8)) - 1; |
| IdentifiersLoaded[ID] |
| = &PP->getIdentifierTable().get(Str, StrLen); |
| if (DeserializationListener) |
| DeserializationListener->IdentifierRead(ID + 1, IdentifiersLoaded[ID]); |
| } |
| |
| return IdentifiersLoaded[ID]; |
| } |
| |
| void PCHReader::ReadSLocEntry(unsigned ID) { |
| ReadSLocEntryRecord(ID); |
| } |
| |
| Selector PCHReader::DecodeSelector(unsigned ID) { |
| if (ID == 0) |
| return Selector(); |
| |
| if (ID > SelectorsLoaded.size()) { |
| Error("selector ID out of range in PCH file"); |
| return Selector(); |
| } |
| |
| if (SelectorsLoaded[ID - 1].getAsOpaquePtr() == 0) { |
| // Load this selector from the selector table. |
| unsigned Idx = ID - 1; |
| for (unsigned I = 0, N = Chain.size(); I != N; ++I) { |
| PerFileData &F = *Chain[N - I - 1]; |
| if (Idx < F.LocalNumSelectors) { |
| PCHSelectorLookupTrait Trait(*this); |
| SelectorsLoaded[ID - 1] = |
| Trait.ReadKey(F.SelectorLookupTableData + F.SelectorOffsets[Idx], 0); |
| if (DeserializationListener) |
| DeserializationListener->SelectorRead(ID, SelectorsLoaded[ID - 1]); |
| break; |
| } |
| Idx -= F.LocalNumSelectors; |
| } |
| } |
| |
| return SelectorsLoaded[ID - 1]; |
| } |
| |
| Selector PCHReader::GetExternalSelector(uint32_t ID) { |
| return DecodeSelector(ID); |
| } |
| |
| uint32_t PCHReader::GetNumExternalSelectors() { |
| // ID 0 (the null selector) is considered an external selector. |
| return getTotalNumSelectors() + 1; |
| } |
| |
| DeclarationName |
| PCHReader::ReadDeclarationName(const RecordData &Record, unsigned &Idx) { |
| DeclarationName::NameKind Kind = (DeclarationName::NameKind)Record[Idx++]; |
| switch (Kind) { |
| case DeclarationName::Identifier: |
| return DeclarationName(GetIdentifierInfo(Record, Idx)); |
| |
| case DeclarationName::ObjCZeroArgSelector: |
| case DeclarationName::ObjCOneArgSelector: |
| case DeclarationName::ObjCMultiArgSelector: |
| return DeclarationName(GetSelector(Record, Idx)); |
| |
| case DeclarationName::CXXConstructorName: |
| return Context->DeclarationNames.getCXXConstructorName( |
| Context->getCanonicalType(GetType(Record[Idx++]))); |
| |
| case DeclarationName::CXXDestructorName: |
| return Context->DeclarationNames.getCXXDestructorName( |
| Context->getCanonicalType(GetType(Record[Idx++]))); |
| |
| case DeclarationName::CXXConversionFunctionName: |
| return Context->DeclarationNames.getCXXConversionFunctionName( |
| Context->getCanonicalType(GetType(Record[Idx++]))); |
| |
| case DeclarationName::CXXOperatorName: |
| return Context->DeclarationNames.getCXXOperatorName( |
| (OverloadedOperatorKind)Record[Idx++]); |
| |
| case DeclarationName::CXXLiteralOperatorName: |
| return Context->DeclarationNames.getCXXLiteralOperatorName( |
| GetIdentifierInfo(Record, Idx)); |
| |
| case DeclarationName::CXXUsingDirective: |
| return DeclarationName::getUsingDirectiveName(); |
| } |
| |
| // Required to silence GCC warning |
| return DeclarationName(); |
| } |
| |
| TemplateName |
| PCHReader::ReadTemplateName(const RecordData &Record, unsigned &Idx) { |
| TemplateName::NameKind Kind = (TemplateName::NameKind)Record[Idx++]; |
| switch (Kind) { |
| case TemplateName::Template: |
| return TemplateName(cast_or_null<TemplateDecl>(GetDecl(Record[Idx++]))); |
| |
| case TemplateName::OverloadedTemplate: { |
| unsigned size = Record[Idx++]; |
| UnresolvedSet<8> Decls; |
| while (size--) |
| Decls.addDecl(cast<NamedDecl>(GetDecl(Record[Idx++]))); |
| |
| return Context->getOverloadedTemplateName(Decls.begin(), Decls.end()); |
| } |
| |
| case TemplateName::QualifiedTemplate: { |
| NestedNameSpecifier *NNS = ReadNestedNameSpecifier(Record, Idx); |
| bool hasTemplKeyword = Record[Idx++]; |
| TemplateDecl *Template = cast<TemplateDecl>(GetDecl(Record[Idx++])); |
| return Context->getQualifiedTemplateName(NNS, hasTemplKeyword, Template); |
| } |
| |
| case TemplateName::DependentTemplate: { |
| NestedNameSpecifier *NNS = ReadNestedNameSpecifier(Record, Idx); |
| if (Record[Idx++]) // isIdentifier |
| return Context->getDependentTemplateName(NNS, |
| GetIdentifierInfo(Record, Idx)); |
| return Context->getDependentTemplateName(NNS, |
| (OverloadedOperatorKind)Record[Idx++]); |
| } |
| } |
| |
| assert(0 && "Unhandled template name kind!"); |
| return TemplateName(); |
| } |
| |
| TemplateArgument |
| PCHReader::ReadTemplateArgument(llvm::BitstreamCursor &DeclsCursor, |
| const RecordData &Record, unsigned &Idx) { |
| switch ((TemplateArgument::ArgKind)Record[Idx++]) { |
| case TemplateArgument::Null: |
| return TemplateArgument(); |
| case TemplateArgument::Type: |
| return TemplateArgument(GetType(Record[Idx++])); |
| case TemplateArgument::Declaration: |
| return TemplateArgument(GetDecl(Record[Idx++])); |
| case TemplateArgument::Integral: { |
| llvm::APSInt Value = ReadAPSInt(Record, Idx); |
| QualType T = GetType(Record[Idx++]); |
| return TemplateArgument(Value, T); |
| } |
| case TemplateArgument::Template: |
| return TemplateArgument(ReadTemplateName(Record, Idx)); |
| case TemplateArgument::Expression: |
| return TemplateArgument(ReadExpr(DeclsCursor)); |
| case TemplateArgument::Pack: { |
| unsigned NumArgs = Record[Idx++]; |
| llvm::SmallVector<TemplateArgument, 8> Args; |
| Args.reserve(NumArgs); |
| while (NumArgs--) |
| Args.push_back(ReadTemplateArgument(DeclsCursor, Record, Idx)); |
| TemplateArgument TemplArg; |
| TemplArg.setArgumentPack(Args.data(), Args.size(), /*CopyArgs=*/true); |
| return TemplArg; |
| } |
| } |
| |
| assert(0 && "Unhandled template argument kind!"); |
| return TemplateArgument(); |
| } |
| |
| TemplateParameterList * |
| PCHReader::ReadTemplateParameterList(const RecordData &Record, unsigned &Idx) { |
| SourceLocation TemplateLoc = ReadSourceLocation(Record, Idx); |
| SourceLocation LAngleLoc = ReadSourceLocation(Record, Idx); |
| SourceLocation RAngleLoc = ReadSourceLocation(Record, Idx); |
| |
| unsigned NumParams = Record[Idx++]; |
| llvm::SmallVector<NamedDecl *, 16> Params; |
| Params.reserve(NumParams); |
| while (NumParams--) |
| Params.push_back(cast<NamedDecl>(GetDecl(Record[Idx++]))); |
| |
| TemplateParameterList* TemplateParams = |
| TemplateParameterList::Create(*Context, TemplateLoc, LAngleLoc, |
| Params.data(), Params.size(), RAngleLoc); |
| return TemplateParams; |
| } |
| |
| void |
| PCHReader:: |
| ReadTemplateArgumentList(llvm::SmallVector<TemplateArgument, 8> &TemplArgs, |
| llvm::BitstreamCursor &DeclsCursor, |
| const RecordData &Record, unsigned &Idx) { |
| unsigned NumTemplateArgs = Record[Idx++]; |
| TemplArgs.reserve(NumTemplateArgs); |
| while (NumTemplateArgs--) |
| TemplArgs.push_back(ReadTemplateArgument(DeclsCursor, Record, Idx)); |
| } |
| |
| /// \brief Read a UnresolvedSet structure. |
| void PCHReader::ReadUnresolvedSet(UnresolvedSetImpl &Set, |
| const RecordData &Record, unsigned &Idx) { |
| unsigned NumDecls = Record[Idx++]; |
| while (NumDecls--) { |
| NamedDecl *D = cast<NamedDecl>(GetDecl(Record[Idx++])); |
| AccessSpecifier AS = (AccessSpecifier)Record[Idx++]; |
| Set.addDecl(D, AS); |
| } |
| } |
| |
| CXXBaseSpecifier |
| PCHReader::ReadCXXBaseSpecifier(llvm::BitstreamCursor &DeclsCursor, |
| const RecordData &Record, unsigned &Idx) { |
| bool isVirtual = static_cast<bool>(Record[Idx++]); |
| bool isBaseOfClass = static_cast<bool>(Record[Idx++]); |
| AccessSpecifier AS = static_cast<AccessSpecifier>(Record[Idx++]); |
| TypeSourceInfo *TInfo = GetTypeSourceInfo(DeclsCursor, Record, Idx); |
| SourceRange Range = ReadSourceRange(Record, Idx); |
| return CXXBaseSpecifier(Range, isVirtual, isBaseOfClass, AS, TInfo); |
| } |
| |
| NestedNameSpecifier * |
| PCHReader::ReadNestedNameSpecifier(const RecordData &Record, unsigned &Idx) { |
| unsigned N = Record[Idx++]; |
| NestedNameSpecifier *NNS = 0, *Prev = 0; |
| for (unsigned I = 0; I != N; ++I) { |
| NestedNameSpecifier::SpecifierKind Kind |
| = (NestedNameSpecifier::SpecifierKind)Record[Idx++]; |
| switch (Kind) { |
| case NestedNameSpecifier::Identifier: { |
| IdentifierInfo *II = GetIdentifierInfo(Record, Idx); |
| NNS = NestedNameSpecifier::Create(*Context, Prev, II); |
| break; |
| } |
| |
| case NestedNameSpecifier::Namespace: { |
| NamespaceDecl *NS = cast<NamespaceDecl>(GetDecl(Record[Idx++])); |
| NNS = NestedNameSpecifier::Create(*Context, Prev, NS); |
| break; |
| } |
| |
| case NestedNameSpecifier::TypeSpec: |
| case NestedNameSpecifier::TypeSpecWithTemplate: { |
| Type *T = GetType(Record[Idx++]).getTypePtr(); |
| bool Template = Record[Idx++]; |
| NNS = NestedNameSpecifier::Create(*Context, Prev, Template, T); |
| break; |
| } |
| |
| case NestedNameSpecifier::Global: { |
| NNS = NestedNameSpecifier::GlobalSpecifier(*Context); |
| // No associated value, and there can't be a prefix. |
| break; |
| } |
| } |
| Prev = NNS; |
| } |
| return NNS; |
| } |
| |
| SourceRange |
| PCHReader::ReadSourceRange(const RecordData &Record, unsigned &Idx) { |
| SourceLocation beg = SourceLocation::getFromRawEncoding(Record[Idx++]); |
| SourceLocation end = SourceLocation::getFromRawEncoding(Record[Idx++]); |
| return SourceRange(beg, end); |
| } |
| |
| /// \brief Read an integral value |
| llvm::APInt PCHReader::ReadAPInt(const RecordData &Record, unsigned &Idx) { |
| unsigned BitWidth = Record[Idx++]; |
| unsigned NumWords = llvm::APInt::getNumWords(BitWidth); |
| llvm::APInt Result(BitWidth, NumWords, &Record[Idx]); |
| Idx += NumWords; |
| return Result; |
| } |
| |
| /// \brief Read a signed integral value |
| llvm::APSInt PCHReader::ReadAPSInt(const RecordData &Record, unsigned &Idx) { |
| bool isUnsigned = Record[Idx++]; |
| return llvm::APSInt(ReadAPInt(Record, Idx), isUnsigned); |
| } |
| |
| /// \brief Read a floating-point value |
| llvm::APFloat PCHReader::ReadAPFloat(const RecordData &Record, unsigned &Idx) { |
| return llvm::APFloat(ReadAPInt(Record, Idx)); |
| } |
| |
| // \brief Read a string |
| std::string PCHReader::ReadString(const RecordData &Record, unsigned &Idx) { |
| unsigned Len = Record[Idx++]; |
| std::string Result(Record.data() + Idx, Record.data() + Idx + Len); |
| Idx += Len; |
| return Result; |
| } |
| |
| CXXTemporary *PCHReader::ReadCXXTemporary(const RecordData &Record, |
| unsigned &Idx) { |
| CXXDestructorDecl *Decl = cast<CXXDestructorDecl>(GetDecl(Record[Idx++])); |
| return CXXTemporary::Create(*Context, Decl); |
| } |
| |
| DiagnosticBuilder PCHReader::Diag(unsigned DiagID) { |
| return Diag(SourceLocation(), DiagID); |
| } |
| |
| DiagnosticBuilder PCHReader::Diag(SourceLocation Loc, unsigned DiagID) { |
| return Diags.Report(FullSourceLoc(Loc, SourceMgr), DiagID); |
| } |
| |
| /// \brief Retrieve the identifier table associated with the |
| /// preprocessor. |
| IdentifierTable &PCHReader::getIdentifierTable() { |
| assert(PP && "Forgot to set Preprocessor ?"); |
| return PP->getIdentifierTable(); |
| } |
| |
| /// \brief Record that the given ID maps to the given switch-case |
| /// statement. |
| void PCHReader::RecordSwitchCaseID(SwitchCase *SC, unsigned ID) { |
| assert(SwitchCaseStmts[ID] == 0 && "Already have a SwitchCase with this ID"); |
| SwitchCaseStmts[ID] = SC; |
| } |
| |
| /// \brief Retrieve the switch-case statement with the given ID. |
| SwitchCase *PCHReader::getSwitchCaseWithID(unsigned ID) { |
| assert(SwitchCaseStmts[ID] != 0 && "No SwitchCase with this ID"); |
| return SwitchCaseStmts[ID]; |
| } |
| |
| /// \brief Record that the given label statement has been |
| /// deserialized and has the given ID. |
| void PCHReader::RecordLabelStmt(LabelStmt *S, unsigned ID) { |
| assert(LabelStmts.find(ID) == LabelStmts.end() && |
| "Deserialized label twice"); |
| LabelStmts[ID] = S; |
| |
| // If we've already seen any goto statements that point to this |
| // label, resolve them now. |
| typedef std::multimap<unsigned, GotoStmt *>::iterator GotoIter; |
| std::pair<GotoIter, GotoIter> Gotos = UnresolvedGotoStmts.equal_range(ID); |
| for (GotoIter Goto = Gotos.first; Goto != Gotos.second; ++Goto) |
| Goto->second->setLabel(S); |
| UnresolvedGotoStmts.erase(Gotos.first, Gotos.second); |
| |
| // If we've already seen any address-label statements that point to |
| // this label, resolve them now. |
| typedef std::multimap<unsigned, AddrLabelExpr *>::iterator AddrLabelIter; |
| std::pair<AddrLabelIter, AddrLabelIter> AddrLabels |
| = UnresolvedAddrLabelExprs.equal_range(ID); |
| for (AddrLabelIter AddrLabel = AddrLabels.first; |
| AddrLabel != AddrLabels.second; ++AddrLabel) |
| AddrLabel->second->setLabel(S); |
| UnresolvedAddrLabelExprs.erase(AddrLabels.first, AddrLabels.second); |
| } |
| |
| /// \brief Set the label of the given statement to the label |
| /// identified by ID. |
| /// |
| /// Depending on the order in which the label and other statements |
| /// referencing that label occur, this operation may complete |
| /// immediately (updating the statement) or it may queue the |
| /// statement to be back-patched later. |
| void PCHReader::SetLabelOf(GotoStmt *S, unsigned ID) { |
| std::map<unsigned, LabelStmt *>::iterator Label = LabelStmts.find(ID); |
| if (Label != LabelStmts.end()) { |
| // We've already seen this label, so set the label of the goto and |
| // we're done. |
| S->setLabel(Label->second); |
| } else { |
| // We haven't seen this label yet, so add this goto to the set of |
| // unresolved goto statements. |
| UnresolvedGotoStmts.insert(std::make_pair(ID, S)); |
| } |
| } |
| |
| /// \brief Set the label of the given expression to the label |
| /// identified by ID. |
| /// |
| /// Depending on the order in which the label and other statements |
| /// referencing that label occur, this operation may complete |
| /// immediately (updating the statement) or it may queue the |
| /// statement to be back-patched later. |
| void PCHReader::SetLabelOf(AddrLabelExpr *S, unsigned ID) { |
| std::map<unsigned, LabelStmt *>::iterator Label = LabelStmts.find(ID); |
| if (Label != LabelStmts.end()) { |
| // We've already seen this label, so set the label of the |
| // label-address expression and we're done. |
| S->setLabel(Label->second); |
| } else { |
| // We haven't seen this label yet, so add this label-address |
| // expression to the set of unresolved label-address expressions. |
| UnresolvedAddrLabelExprs.insert(std::make_pair(ID, S)); |
| } |
| } |
| |
| void PCHReader::FinishedDeserializing() { |
| assert(NumCurrentElementsDeserializing && |
| "FinishedDeserializing not paired with StartedDeserializing"); |
| if (NumCurrentElementsDeserializing == 1) { |
| // If any identifiers with corresponding top-level declarations have |
| // been loaded, load those declarations now. |
| while (!PendingIdentifierInfos.empty()) { |
| SetGloballyVisibleDecls(PendingIdentifierInfos.front().II, |
| PendingIdentifierInfos.front().DeclIDs, true); |
| PendingIdentifierInfos.pop_front(); |
| } |
| |
| // We are not in recursive loading, so it's safe to pass the "interesting" |
| // decls to the consumer. |
| if (Consumer) |
| PassInterestingDeclsToConsumer(); |
| } |
| --NumCurrentElementsDeserializing; |
| } |