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/Serialization/ChainedIncludesSource.h"
16 #include "clang/Serialization/ASTReader.h"
17 #include "clang/Serialization/ASTWriter.h"
18 #include "clang/Frontend/TextDiagnosticPrinter.h"
19 #include "clang/Frontend/CompilerInstance.h"
20 #include "clang/Frontend/ASTUnit.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"
26 using namespace clang;
28 static ASTReader *createASTReader(CompilerInstance &CI,
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]);
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());
48 case ASTReader::Failure:
49 case ASTReader::IgnorePCH:
55 ChainedIncludesSource::~ChainedIncludesSource() {
56 for (unsigned i = 0, e = CIs.size(); i != e; ++i)
60 ChainedIncludesSource *ChainedIncludesSource::create(CompilerInstance &CI) {
62 std::vector<std::string> &includes = CI.getPreprocessorOpts().ChainedIncludes;
63 assert(!includes.empty() && "No '-chain-include' in options!");
65 llvm::OwningPtr<ChainedIncludesSource> source(new ChainedIncludesSource());
66 InputKind IK = CI.getFrontendOpts().Inputs[0].first;
68 SmallVector<llvm::MemoryBuffer *, 4> serialBufs;
69 SmallVector<std::string, 4> serialBufNames;
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()));
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();
84 CInvok->getFrontendOpts().Inputs.clear();
85 CInvok->getFrontendOpts().Inputs.push_back(std::make_pair(IK, includes[i]));
87 TextDiagnosticPrinter *DiagClient =
88 new TextDiagnosticPrinter(llvm::errs(), DiagnosticOptions());
89 llvm::IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
90 llvm::IntrusiveRefCntPtr<DiagnosticsEngine> Diags(
91 new DiagnosticsEngine(DiagID, DiagClient));
93 llvm::OwningPtr<CompilerInstance> Clang(new CompilerInstance());
94 Clang->setInvocation(CInvok.take());
95 Clang->setDiagnostics(Diags.getPtr());
96 Clang->setTarget(TargetInfo::CreateTargetInfo(Clang->getDiagnostics(),
97 Clang->getTargetOpts()));
98 Clang->createFileManager();
99 Clang->createSourceManager(Clang->getFileManager());
100 Clang->createPreprocessor();
101 Clang->getDiagnosticClient().BeginSourceFile(Clang->getLangOpts(),
102 &Clang->getPreprocessor());
103 Clang->createASTContext();
105 SmallVector<char, 256> serialAST;
106 llvm::raw_svector_ostream OS(serialAST);
107 llvm::OwningPtr<ASTConsumer> consumer;
108 consumer.reset(new PCHGenerator(Clang->getPreprocessor(), "-",
109 /*IsModule=*/false, /*isysroot=*/"", &OS));
110 Clang->getASTContext().setASTMutationListener(
111 consumer->GetASTMutationListener());
112 Clang->setASTConsumer(consumer.take());
113 Clang->createSema(TU_Prefix, 0);
116 Preprocessor &PP = Clang->getPreprocessor();
117 PP.getBuiltinInfo().InitializeBuiltins(PP.getIdentifierTable(),
118 PP.getLangOptions());
120 assert(!serialBufs.empty());
121 SmallVector<llvm::MemoryBuffer *, 4> bufs;
122 for (unsigned si = 0, se = serialBufs.size(); si != se; ++si) {
123 bufs.push_back(llvm::MemoryBuffer::getMemBufferCopy(
124 StringRef(serialBufs[si]->getBufferStart(),
125 serialBufs[si]->getBufferSize())));
127 std::string pchName = includes[i-1];
128 llvm::raw_string_ostream os(pchName);
132 serialBufNames.push_back(pchName);
134 llvm::OwningPtr<ExternalASTSource> Reader;
136 Reader.reset(createASTReader(*Clang, pchName, bufs, serialBufNames,
137 Clang->getASTConsumer().GetASTDeserializationListener()));
140 Clang->getASTContext().setExternalSource(Reader);
143 if (!Clang->InitializeSourceManager(includes[i]))
146 ParseAST(Clang->getSema());
148 Clang->getDiagnosticClient().EndSourceFile();
149 serialBufs.push_back(
150 llvm::MemoryBuffer::getMemBufferCopy(StringRef(serialAST.data(),
152 source->CIs.push_back(Clang.take());
155 assert(!serialBufs.empty());
156 std::string pchName = includes.back() + ".pch-final";
157 serialBufNames.push_back(pchName);
158 llvm::OwningPtr<ASTReader> Reader;
159 Reader.reset(createASTReader(CI, pchName, serialBufs, serialBufNames));
163 source->FinalReader.reset(Reader.take());
164 return source.take();
167 //===----------------------------------------------------------------------===//
168 // ExternalASTSource interface.
169 //===----------------------------------------------------------------------===//
171 Decl *ChainedIncludesSource::GetExternalDecl(uint32_t ID) {
172 return getFinalReader().GetExternalDecl(ID);
174 Selector ChainedIncludesSource::GetExternalSelector(uint32_t ID) {
175 return getFinalReader().GetExternalSelector(ID);
177 uint32_t ChainedIncludesSource::GetNumExternalSelectors() {
178 return getFinalReader().GetNumExternalSelectors();
180 Stmt *ChainedIncludesSource::GetExternalDeclStmt(uint64_t Offset) {
181 return getFinalReader().GetExternalDeclStmt(Offset);
184 ChainedIncludesSource::GetExternalCXXBaseSpecifiers(uint64_t Offset) {
185 return getFinalReader().GetExternalCXXBaseSpecifiers(Offset);
187 DeclContextLookupResult
188 ChainedIncludesSource::FindExternalVisibleDeclsByName(const DeclContext *DC,
189 DeclarationName Name) {
190 return getFinalReader().FindExternalVisibleDeclsByName(DC, Name);
193 ChainedIncludesSource::FindExternalLexicalDecls(const DeclContext *DC,
194 bool (*isKindWeWant)(Decl::Kind),
195 SmallVectorImpl<Decl*> &Result) {
196 return getFinalReader().FindExternalLexicalDecls(DC, isKindWeWant, Result);
198 void ChainedIncludesSource::CompleteType(TagDecl *Tag) {
199 return getFinalReader().CompleteType(Tag);
201 void ChainedIncludesSource::CompleteType(ObjCInterfaceDecl *Class) {
202 return getFinalReader().CompleteType(Class);
204 void ChainedIncludesSource::StartedDeserializing() {
205 return getFinalReader().StartedDeserializing();
207 void ChainedIncludesSource::FinishedDeserializing() {
208 return getFinalReader().FinishedDeserializing();
210 void ChainedIncludesSource::StartTranslationUnit(ASTConsumer *Consumer) {
211 return getFinalReader().StartTranslationUnit(Consumer);
213 void ChainedIncludesSource::PrintStats() {
214 return getFinalReader().PrintStats();
216 void ChainedIncludesSource::getMemoryBufferSizes(MemoryBufferSizes &sizes)const{
217 for (unsigned i = 0, e = CIs.size(); i != e; ++i) {
218 if (const ExternalASTSource *eSrc =
219 CIs[i]->getASTContext().getExternalSource()) {
220 eSrc->getMemoryBufferSizes(sizes);
224 getFinalReader().getMemoryBufferSizes(sizes);
227 void ChainedIncludesSource::InitializeSema(Sema &S) {
228 return getFinalReader().InitializeSema(S);
230 void ChainedIncludesSource::ForgetSema() {
231 return getFinalReader().ForgetSema();
233 std::pair<ObjCMethodList,ObjCMethodList>
234 ChainedIncludesSource::ReadMethodPool(Selector Sel) {
235 return getFinalReader().ReadMethodPool(Sel);
237 bool ChainedIncludesSource::LookupUnqualified(LookupResult &R, Scope *S) {
238 return getFinalReader().LookupUnqualified(R, S);