ChainedIncludesSource.cpp revision 5ac4b6917aa34fae6da64036539023a6155a3d48
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/Frontend/TextDiagnosticPrinter.h" 17#include "clang/Frontend/CompilerInstance.h" 18#include "clang/Frontend/ASTUnit.h" 19#include "clang/Serialization/ASTReader.h" 20#include "clang/Serialization/ASTWriter.h" 21#include "clang/Parse/ParseAST.h" 22#include "clang/Lex/Preprocessor.h" 23#include "clang/Basic/TargetInfo.h" 24#include "llvm/Support/MemoryBuffer.h" 25 26using namespace clang; 27 28static ASTReader *createASTReader(CompilerInstance &CI, 29 StringRef pchFile, 30 SmallVector<llvm::MemoryBuffer *, 4> &memBufs, 31 SmallVector<std::string, 4> &bufNames, 32 ASTDeserializationListener *deserialListener = 0) { 33 Preprocessor &PP = CI.getPreprocessor(); 34 llvm::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)) { 43 case ASTReader::Success: 44 // Set the predefines buffer as suggested by the PCH reader. 45 PP.setPredefines(Reader->getSuggestedPredefines()); 46 return Reader.take(); 47 48 case ASTReader::Failure: 49 case ASTReader::IgnorePCH: 50 break; 51 } 52 return 0; 53} 54 55ChainedIncludesSource::~ChainedIncludesSource() { 56 for (unsigned i = 0, e = CIs.size(); i != e; ++i) 57 delete CIs[i]; 58} 59 60ChainedIncludesSource *ChainedIncludesSource::create(CompilerInstance &CI) { 61 62 std::vector<std::string> &includes = CI.getPreprocessorOpts().ChainedIncludes; 63 assert(!includes.empty() && "No '-chain-include' in options!"); 64 65 llvm::OwningPtr<ChainedIncludesSource> source(new ChainedIncludesSource()); 66 InputKind IK = CI.getFrontendOpts().Inputs[0].Kind; 67 68 SmallVector<llvm::MemoryBuffer *, 4> serialBufs; 69 SmallVector<std::string, 4> serialBufNames; 70 71 for (unsigned i = 0, e = includes.size(); i != e; ++i) { 72 bool firstInclude = (i == 0); 73 llvm::OwningPtr<CompilerInvocation> CInvok; 74 CInvok.reset(new CompilerInvocation(CI.getInvocation())); 75 76 CInvok->getPreprocessorOpts().ChainedIncludes.clear(); 77 CInvok->getPreprocessorOpts().ImplicitPCHInclude.clear(); 78 CInvok->getPreprocessorOpts().ImplicitPTHInclude.clear(); 79 CInvok->getPreprocessorOpts().DisablePCHValidation = true; 80 CInvok->getPreprocessorOpts().Includes.clear(); 81 CInvok->getPreprocessorOpts().MacroIncludes.clear(); 82 CInvok->getPreprocessorOpts().Macros.clear(); 83 84 CInvok->getFrontendOpts().Inputs.clear(); 85 CInvok->getFrontendOpts().Inputs.push_back(FrontendInputFile(includes[i], 86 IK)); 87 88 TextDiagnosticPrinter *DiagClient = 89 new TextDiagnosticPrinter(llvm::errs(), DiagnosticOptions()); 90 llvm::IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs()); 91 llvm::IntrusiveRefCntPtr<DiagnosticsEngine> Diags( 92 new DiagnosticsEngine(DiagID, DiagClient)); 93 94 llvm::OwningPtr<CompilerInstance> Clang(new CompilerInstance()); 95 Clang->setInvocation(CInvok.take()); 96 Clang->setDiagnostics(Diags.getPtr()); 97 Clang->setTarget(TargetInfo::CreateTargetInfo(Clang->getDiagnostics(), 98 Clang->getTargetOpts())); 99 Clang->createFileManager(); 100 Clang->createSourceManager(Clang->getFileManager()); 101 Clang->createPreprocessor(); 102 Clang->getDiagnosticClient().BeginSourceFile(Clang->getLangOpts(), 103 &Clang->getPreprocessor()); 104 Clang->createASTContext(); 105 106 SmallVector<char, 256> serialAST; 107 llvm::raw_svector_ostream OS(serialAST); 108 llvm::OwningPtr<ASTConsumer> consumer; 109 consumer.reset(new PCHGenerator(Clang->getPreprocessor(), "-", 0, 110 /*isysroot=*/"", &OS)); 111 Clang->getASTContext().setASTMutationListener( 112 consumer->GetASTMutationListener()); 113 Clang->setASTConsumer(consumer.take()); 114 Clang->createSema(TU_Prefix, 0); 115 116 if (firstInclude) { 117 Preprocessor &PP = Clang->getPreprocessor(); 118 PP.getBuiltinInfo().InitializeBuiltins(PP.getIdentifierTable(), 119 PP.getLangOptions()); 120 } else { 121 assert(!serialBufs.empty()); 122 SmallVector<llvm::MemoryBuffer *, 4> bufs; 123 for (unsigned si = 0, se = serialBufs.size(); si != se; ++si) { 124 bufs.push_back(llvm::MemoryBuffer::getMemBufferCopy( 125 StringRef(serialBufs[si]->getBufferStart(), 126 serialBufs[si]->getBufferSize()))); 127 } 128 std::string pchName = includes[i-1]; 129 llvm::raw_string_ostream os(pchName); 130 os << ".pch" << i-1; 131 os.flush(); 132 133 serialBufNames.push_back(pchName); 134 135 llvm::OwningPtr<ExternalASTSource> Reader; 136 137 Reader.reset(createASTReader(*Clang, pchName, bufs, serialBufNames, 138 Clang->getASTConsumer().GetASTDeserializationListener())); 139 if (!Reader) 140 return 0; 141 Clang->getASTContext().setExternalSource(Reader); 142 } 143 144 if (!Clang->InitializeSourceManager(includes[i])) 145 return 0; 146 147 ParseAST(Clang->getSema()); 148 OS.flush(); 149 Clang->getDiagnosticClient().EndSourceFile(); 150 serialBufs.push_back( 151 llvm::MemoryBuffer::getMemBufferCopy(StringRef(serialAST.data(), 152 serialAST.size()))); 153 source->CIs.push_back(Clang.take()); 154 } 155 156 assert(!serialBufs.empty()); 157 std::string pchName = includes.back() + ".pch-final"; 158 serialBufNames.push_back(pchName); 159 llvm::OwningPtr<ASTReader> Reader; 160 Reader.reset(createASTReader(CI, pchName, serialBufs, serialBufNames)); 161 if (!Reader) 162 return 0; 163 164 source->FinalReader.reset(Reader.take()); 165 return source.take(); 166} 167 168//===----------------------------------------------------------------------===// 169// ExternalASTSource interface. 170//===----------------------------------------------------------------------===// 171 172Decl *ChainedIncludesSource::GetExternalDecl(uint32_t ID) { 173 return getFinalReader().GetExternalDecl(ID); 174} 175Selector ChainedIncludesSource::GetExternalSelector(uint32_t ID) { 176 return getFinalReader().GetExternalSelector(ID); 177} 178uint32_t ChainedIncludesSource::GetNumExternalSelectors() { 179 return getFinalReader().GetNumExternalSelectors(); 180} 181Stmt *ChainedIncludesSource::GetExternalDeclStmt(uint64_t Offset) { 182 return getFinalReader().GetExternalDeclStmt(Offset); 183} 184CXXBaseSpecifier * 185ChainedIncludesSource::GetExternalCXXBaseSpecifiers(uint64_t Offset) { 186 return getFinalReader().GetExternalCXXBaseSpecifiers(Offset); 187} 188DeclContextLookupResult 189ChainedIncludesSource::FindExternalVisibleDeclsByName(const DeclContext *DC, 190 DeclarationName Name) { 191 return getFinalReader().FindExternalVisibleDeclsByName(DC, Name); 192} 193ExternalLoadResult 194ChainedIncludesSource::FindExternalLexicalDecls(const DeclContext *DC, 195 bool (*isKindWeWant)(Decl::Kind), 196 SmallVectorImpl<Decl*> &Result) { 197 return getFinalReader().FindExternalLexicalDecls(DC, isKindWeWant, Result); 198} 199void ChainedIncludesSource::CompleteType(TagDecl *Tag) { 200 return getFinalReader().CompleteType(Tag); 201} 202void ChainedIncludesSource::CompleteType(ObjCInterfaceDecl *Class) { 203 return getFinalReader().CompleteType(Class); 204} 205void ChainedIncludesSource::StartedDeserializing() { 206 return getFinalReader().StartedDeserializing(); 207} 208void ChainedIncludesSource::FinishedDeserializing() { 209 return getFinalReader().FinishedDeserializing(); 210} 211void ChainedIncludesSource::StartTranslationUnit(ASTConsumer *Consumer) { 212 return getFinalReader().StartTranslationUnit(Consumer); 213} 214void ChainedIncludesSource::PrintStats() { 215 return getFinalReader().PrintStats(); 216} 217void ChainedIncludesSource::getMemoryBufferSizes(MemoryBufferSizes &sizes)const{ 218 for (unsigned i = 0, e = CIs.size(); i != e; ++i) { 219 if (const ExternalASTSource *eSrc = 220 CIs[i]->getASTContext().getExternalSource()) { 221 eSrc->getMemoryBufferSizes(sizes); 222 } 223 } 224 225 getFinalReader().getMemoryBufferSizes(sizes); 226} 227 228void ChainedIncludesSource::InitializeSema(Sema &S) { 229 return getFinalReader().InitializeSema(S); 230} 231void ChainedIncludesSource::ForgetSema() { 232 return getFinalReader().ForgetSema(); 233} 234void ChainedIncludesSource::ReadMethodPool(Selector Sel) { 235 getFinalReader().ReadMethodPool(Sel); 236} 237bool ChainedIncludesSource::LookupUnqualified(LookupResult &R, Scope *S) { 238 return getFinalReader().LookupUnqualified(R, S); 239} 240 241