1 //===- ChainedIncludesSource.cpp - Chained PCHs in Memory -------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file defines the ChainedIncludesSource class, which converts headers 11 // to chained PCHs in memory, mainly used for testing. 12 // 13 //===----------------------------------------------------------------------===// 14 15 #include "clang/Frontend/ChainedIncludesSource.h" 16 #include "clang/Basic/TargetInfo.h" 17 #include "clang/Frontend/ASTUnit.h" 18 #include "clang/Frontend/CompilerInstance.h" 19 #include "clang/Frontend/TextDiagnosticPrinter.h" 20 #include "clang/Lex/Preprocessor.h" 21 #include "clang/Parse/ParseAST.h" 22 #include "clang/Serialization/ASTReader.h" 23 #include "clang/Serialization/ASTWriter.h" 24 #include "llvm/Support/MemoryBuffer.h" 25 26 using namespace clang; 27 28 static ASTReader *createASTReader(CompilerInstance &CI, 29 StringRef pchFile, 30 SmallVectorImpl<llvm::MemoryBuffer *> &memBufs, 31 SmallVectorImpl<std::string> &bufNames, 32 ASTDeserializationListener *deserialListener = 0) { 33 Preprocessor &PP = CI.getPreprocessor(); 34 OwningPtr<ASTReader> Reader; 35 Reader.reset(new ASTReader(PP, CI.getASTContext(), /*isysroot=*/"", 36 /*DisableValidation=*/true)); 37 for (unsigned ti = 0; ti < bufNames.size(); ++ti) { 38 StringRef sr(bufNames[ti]); 39 Reader->addInMemoryBuffer(sr, memBufs[ti]); 40 } 41 Reader->setDeserializationListener(deserialListener); 42 switch (Reader->ReadAST(pchFile, serialization::MK_PCH, SourceLocation(), 43 ASTReader::ARR_None)) { 44 case ASTReader::Success: 45 // Set the predefines buffer as suggested by the PCH reader. 46 PP.setPredefines(Reader->getSuggestedPredefines()); 47 return Reader.take(); 48 49 case ASTReader::Failure: 50 case ASTReader::Missing: 51 case ASTReader::OutOfDate: 52 case ASTReader::VersionMismatch: 53 case ASTReader::ConfigurationMismatch: 54 case ASTReader::HadErrors: 55 break; 56 } 57 return 0; 58 } 59 60 ChainedIncludesSource::~ChainedIncludesSource() { 61 for (unsigned i = 0, e = CIs.size(); i != e; ++i) 62 delete CIs[i]; 63 } 64 65 ChainedIncludesSource *ChainedIncludesSource::create(CompilerInstance &CI) { 66 67 std::vector<std::string> &includes = CI.getPreprocessorOpts().ChainedIncludes; 68 assert(!includes.empty() && "No '-chain-include' in options!"); 69 70 OwningPtr<ChainedIncludesSource> source(new ChainedIncludesSource()); 71 InputKind IK = CI.getFrontendOpts().Inputs[0].getKind(); 72 73 SmallVector<llvm::MemoryBuffer *, 4> serialBufs; 74 SmallVector<std::string, 4> serialBufNames; 75 76 for (unsigned i = 0, e = includes.size(); i != e; ++i) { 77 bool firstInclude = (i == 0); 78 OwningPtr<CompilerInvocation> CInvok; 79 CInvok.reset(new CompilerInvocation(CI.getInvocation())); 80 81 CInvok->getPreprocessorOpts().ChainedIncludes.clear(); 82 CInvok->getPreprocessorOpts().ImplicitPCHInclude.clear(); 83 CInvok->getPreprocessorOpts().ImplicitPTHInclude.clear(); 84 CInvok->getPreprocessorOpts().DisablePCHValidation = true; 85 CInvok->getPreprocessorOpts().Includes.clear(); 86 CInvok->getPreprocessorOpts().MacroIncludes.clear(); 87 CInvok->getPreprocessorOpts().Macros.clear(); 88 89 CInvok->getFrontendOpts().Inputs.clear(); 90 FrontendInputFile InputFile(includes[i], IK); 91 CInvok->getFrontendOpts().Inputs.push_back(InputFile); 92 93 TextDiagnosticPrinter *DiagClient = 94 new TextDiagnosticPrinter(llvm::errs(), new DiagnosticOptions()); 95 IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs()); 96 IntrusiveRefCntPtr<DiagnosticsEngine> Diags( 97 new DiagnosticsEngine(DiagID, &CI.getDiagnosticOpts(), DiagClient)); 98 99 OwningPtr<CompilerInstance> Clang(new CompilerInstance()); 100 Clang->setInvocation(CInvok.take()); 101 Clang->setDiagnostics(Diags.getPtr()); 102 Clang->setTarget(TargetInfo::CreateTargetInfo(Clang->getDiagnostics(), 103 &Clang->getTargetOpts())); 104 Clang->createFileManager(); 105 Clang->createSourceManager(Clang->getFileManager()); 106 Clang->createPreprocessor(); 107 Clang->getDiagnosticClient().BeginSourceFile(Clang->getLangOpts(), 108 &Clang->getPreprocessor()); 109 Clang->createASTContext(); 110 111 SmallVector<char, 256> serialAST; 112 llvm::raw_svector_ostream OS(serialAST); 113 OwningPtr<ASTConsumer> consumer; 114 consumer.reset(new PCHGenerator(Clang->getPreprocessor(), "-", 0, 115 /*isysroot=*/"", &OS)); 116 Clang->getASTContext().setASTMutationListener( 117 consumer->GetASTMutationListener()); 118 Clang->setASTConsumer(consumer.take()); 119 Clang->createSema(TU_Prefix, 0); 120 121 if (firstInclude) { 122 Preprocessor &PP = Clang->getPreprocessor(); 123 PP.getBuiltinInfo().InitializeBuiltins(PP.getIdentifierTable(), 124 PP.getLangOpts()); 125 } else { 126 assert(!serialBufs.empty()); 127 SmallVector<llvm::MemoryBuffer *, 4> bufs; 128 for (unsigned si = 0, se = serialBufs.size(); si != se; ++si) { 129 bufs.push_back(llvm::MemoryBuffer::getMemBufferCopy( 130 StringRef(serialBufs[si]->getBufferStart(), 131 serialBufs[si]->getBufferSize()))); 132 } 133 std::string pchName = includes[i-1]; 134 llvm::raw_string_ostream os(pchName); 135 os << ".pch" << i-1; 136 os.flush(); 137 138 serialBufNames.push_back(pchName); 139 140 OwningPtr<ExternalASTSource> Reader; 141 142 Reader.reset(createASTReader(*Clang, pchName, bufs, serialBufNames, 143 Clang->getASTConsumer().GetASTDeserializationListener())); 144 if (!Reader) 145 return 0; 146 Clang->setModuleManager(static_cast<ASTReader*>(Reader.get())); 147 Clang->getASTContext().setExternalSource(Reader); 148 } 149 150 if (!Clang->InitializeSourceManager(InputFile)) 151 return 0; 152 153 ParseAST(Clang->getSema()); 154 OS.flush(); 155 Clang->getDiagnosticClient().EndSourceFile(); 156 serialBufs.push_back( 157 llvm::MemoryBuffer::getMemBufferCopy(StringRef(serialAST.data(), 158 serialAST.size()))); 159 source->CIs.push_back(Clang.take()); 160 } 161 162 assert(!serialBufs.empty()); 163 std::string pchName = includes.back() + ".pch-final"; 164 serialBufNames.push_back(pchName); 165 OwningPtr<ASTReader> Reader; 166 Reader.reset(createASTReader(CI, pchName, serialBufs, serialBufNames)); 167 if (!Reader) 168 return 0; 169 170 source->FinalReader.reset(Reader.take()); 171 return source.take(); 172 } 173 174 //===----------------------------------------------------------------------===// 175 // ExternalASTSource interface. 176 //===----------------------------------------------------------------------===// 177 178 Decl *ChainedIncludesSource::GetExternalDecl(uint32_t ID) { 179 return getFinalReader().GetExternalDecl(ID); 180 } 181 Selector ChainedIncludesSource::GetExternalSelector(uint32_t ID) { 182 return getFinalReader().GetExternalSelector(ID); 183 } 184 uint32_t ChainedIncludesSource::GetNumExternalSelectors() { 185 return getFinalReader().GetNumExternalSelectors(); 186 } 187 Stmt *ChainedIncludesSource::GetExternalDeclStmt(uint64_t Offset) { 188 return getFinalReader().GetExternalDeclStmt(Offset); 189 } 190 CXXBaseSpecifier * 191 ChainedIncludesSource::GetExternalCXXBaseSpecifiers(uint64_t Offset) { 192 return getFinalReader().GetExternalCXXBaseSpecifiers(Offset); 193 } 194 bool 195 ChainedIncludesSource::FindExternalVisibleDeclsByName(const DeclContext *DC, 196 DeclarationName Name) { 197 return getFinalReader().FindExternalVisibleDeclsByName(DC, Name); 198 } 199 ExternalLoadResult 200 ChainedIncludesSource::FindExternalLexicalDecls(const DeclContext *DC, 201 bool (*isKindWeWant)(Decl::Kind), 202 SmallVectorImpl<Decl*> &Result) { 203 return getFinalReader().FindExternalLexicalDecls(DC, isKindWeWant, Result); 204 } 205 void ChainedIncludesSource::CompleteType(TagDecl *Tag) { 206 return getFinalReader().CompleteType(Tag); 207 } 208 void ChainedIncludesSource::CompleteType(ObjCInterfaceDecl *Class) { 209 return getFinalReader().CompleteType(Class); 210 } 211 void ChainedIncludesSource::StartedDeserializing() { 212 return getFinalReader().StartedDeserializing(); 213 } 214 void ChainedIncludesSource::FinishedDeserializing() { 215 return getFinalReader().FinishedDeserializing(); 216 } 217 void ChainedIncludesSource::StartTranslationUnit(ASTConsumer *Consumer) { 218 return getFinalReader().StartTranslationUnit(Consumer); 219 } 220 void ChainedIncludesSource::PrintStats() { 221 return getFinalReader().PrintStats(); 222 } 223 void ChainedIncludesSource::getMemoryBufferSizes(MemoryBufferSizes &sizes)const{ 224 for (unsigned i = 0, e = CIs.size(); i != e; ++i) { 225 if (const ExternalASTSource *eSrc = 226 CIs[i]->getASTContext().getExternalSource()) { 227 eSrc->getMemoryBufferSizes(sizes); 228 } 229 } 230 231 getFinalReader().getMemoryBufferSizes(sizes); 232 } 233 234 void ChainedIncludesSource::InitializeSema(Sema &S) { 235 return getFinalReader().InitializeSema(S); 236 } 237 void ChainedIncludesSource::ForgetSema() { 238 return getFinalReader().ForgetSema(); 239 } 240 void ChainedIncludesSource::ReadMethodPool(Selector Sel) { 241 getFinalReader().ReadMethodPool(Sel); 242 } 243 bool ChainedIncludesSource::LookupUnqualified(LookupResult &R, Scope *S) { 244 return getFinalReader().LookupUnqualified(R, S); 245 } 246 247