1 //===- ChainedIncludesSource.cpp - Chained PCHs in Memory -------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the ChainedIncludesSource class, which converts headers
11 // to chained PCHs in memory, mainly used for testing.
13 //===----------------------------------------------------------------------===//
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"
26 using namespace clang;
28 static ASTReader *createASTReader(CompilerInstance &CI,
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]);
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());
49 case ASTReader::Failure:
50 case ASTReader::Missing:
51 case ASTReader::OutOfDate:
52 case ASTReader::VersionMismatch:
53 case ASTReader::ConfigurationMismatch:
54 case ASTReader::HadErrors:
60 ChainedIncludesSource::~ChainedIncludesSource() {
61 for (unsigned i = 0, e = CIs.size(); i != e; ++i)
65 ChainedIncludesSource *ChainedIncludesSource::create(CompilerInstance &CI) {
67 std::vector<std::string> &includes = CI.getPreprocessorOpts().ChainedIncludes;
68 assert(!includes.empty() && "No '-chain-include' in options!");
70 OwningPtr<ChainedIncludesSource> source(new ChainedIncludesSource());
71 InputKind IK = CI.getFrontendOpts().Inputs[0].getKind();
73 SmallVector<llvm::MemoryBuffer *, 4> serialBufs;
74 SmallVector<std::string, 4> serialBufNames;
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()));
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();
89 CInvok->getFrontendOpts().Inputs.clear();
90 FrontendInputFile InputFile(includes[i], IK);
91 CInvok->getFrontendOpts().Inputs.push_back(InputFile);
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));
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();
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);
122 Preprocessor &PP = Clang->getPreprocessor();
123 PP.getBuiltinInfo().InitializeBuiltins(PP.getIdentifierTable(),
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())));
133 std::string pchName = includes[i-1];
134 llvm::raw_string_ostream os(pchName);
138 serialBufNames.push_back(pchName);
140 OwningPtr<ExternalASTSource> Reader;
142 Reader.reset(createASTReader(*Clang, pchName, bufs, serialBufNames,
143 Clang->getASTConsumer().GetASTDeserializationListener()));
146 Clang->setModuleManager(static_cast<ASTReader*>(Reader.get()));
147 Clang->getASTContext().setExternalSource(Reader);
150 if (!Clang->InitializeSourceManager(InputFile))
153 ParseAST(Clang->getSema());
155 Clang->getDiagnosticClient().EndSourceFile();
156 serialBufs.push_back(
157 llvm::MemoryBuffer::getMemBufferCopy(StringRef(serialAST.data(),
159 source->CIs.push_back(Clang.take());
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));
170 source->FinalReader.reset(Reader.take());
171 return source.take();
174 //===----------------------------------------------------------------------===//
175 // ExternalASTSource interface.
176 //===----------------------------------------------------------------------===//
178 Decl *ChainedIncludesSource::GetExternalDecl(uint32_t ID) {
179 return getFinalReader().GetExternalDecl(ID);
181 Selector ChainedIncludesSource::GetExternalSelector(uint32_t ID) {
182 return getFinalReader().GetExternalSelector(ID);
184 uint32_t ChainedIncludesSource::GetNumExternalSelectors() {
185 return getFinalReader().GetNumExternalSelectors();
187 Stmt *ChainedIncludesSource::GetExternalDeclStmt(uint64_t Offset) {
188 return getFinalReader().GetExternalDeclStmt(Offset);
191 ChainedIncludesSource::GetExternalCXXBaseSpecifiers(uint64_t Offset) {
192 return getFinalReader().GetExternalCXXBaseSpecifiers(Offset);
195 ChainedIncludesSource::FindExternalVisibleDeclsByName(const DeclContext *DC,
196 DeclarationName Name) {
197 return getFinalReader().FindExternalVisibleDeclsByName(DC, Name);
200 ChainedIncludesSource::FindExternalLexicalDecls(const DeclContext *DC,
201 bool (*isKindWeWant)(Decl::Kind),
202 SmallVectorImpl<Decl*> &Result) {
203 return getFinalReader().FindExternalLexicalDecls(DC, isKindWeWant, Result);
205 void ChainedIncludesSource::CompleteType(TagDecl *Tag) {
206 return getFinalReader().CompleteType(Tag);
208 void ChainedIncludesSource::CompleteType(ObjCInterfaceDecl *Class) {
209 return getFinalReader().CompleteType(Class);
211 void ChainedIncludesSource::StartedDeserializing() {
212 return getFinalReader().StartedDeserializing();
214 void ChainedIncludesSource::FinishedDeserializing() {
215 return getFinalReader().FinishedDeserializing();
217 void ChainedIncludesSource::StartTranslationUnit(ASTConsumer *Consumer) {
218 return getFinalReader().StartTranslationUnit(Consumer);
220 void ChainedIncludesSource::PrintStats() {
221 return getFinalReader().PrintStats();
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);
231 getFinalReader().getMemoryBufferSizes(sizes);
234 void ChainedIncludesSource::InitializeSema(Sema &S) {
235 return getFinalReader().InitializeSema(S);
237 void ChainedIncludesSource::ForgetSema() {
238 return getFinalReader().ForgetSema();
240 void ChainedIncludesSource::ReadMethodPool(Selector Sel) {
241 getFinalReader().ReadMethodPool(Sel);
243 bool ChainedIncludesSource::LookupUnqualified(LookupResult &R, Scope *S) {
244 return getFinalReader().LookupUnqualified(R, S);