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//===- ChainedIncludesSource.cpp - Chained PCHs in Memory -------*- 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 ChainedIncludesSource class, which converts headers
// to chained PCHs in memory, mainly used for testing.
//
//===----------------------------------------------------------------------===//
#include "clang/Frontend/ChainedIncludesSource.h"
#include "clang/Frontend/TextDiagnosticPrinter.h"
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Frontend/ASTUnit.h"
#include "clang/Serialization/ASTReader.h"
#include "clang/Serialization/ASTWriter.h"
#include "clang/Parse/ParseAST.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Basic/TargetInfo.h"
#include "llvm/Support/MemoryBuffer.h"
using namespace clang;
static ASTReader *createASTReader(CompilerInstance &CI,
StringRef pchFile,
SmallVector<llvm::MemoryBuffer *, 4> &memBufs,
SmallVector<std::string, 4> &bufNames,
ASTDeserializationListener *deserialListener = 0) {
Preprocessor &PP = CI.getPreprocessor();
OwningPtr<ASTReader> Reader;
Reader.reset(new ASTReader(PP, CI.getASTContext(), /*isysroot=*/"",
/*DisableValidation=*/true));
for (unsigned ti = 0; ti < bufNames.size(); ++ti) {
StringRef sr(bufNames[ti]);
Reader->addInMemoryBuffer(sr, memBufs[ti]);
}
Reader->setDeserializationListener(deserialListener);
switch (Reader->ReadAST(pchFile, serialization::MK_PCH)) {
case ASTReader::Success:
// Set the predefines buffer as suggested by the PCH reader.
PP.setPredefines(Reader->getSuggestedPredefines());
return Reader.take();
case ASTReader::Failure:
case ASTReader::IgnorePCH:
break;
}
return 0;
}
ChainedIncludesSource::~ChainedIncludesSource() {
for (unsigned i = 0, e = CIs.size(); i != e; ++i)
delete CIs[i];
}
ChainedIncludesSource *ChainedIncludesSource::create(CompilerInstance &CI) {
std::vector<std::string> &includes = CI.getPreprocessorOpts().ChainedIncludes;
assert(!includes.empty() && "No '-chain-include' in options!");
OwningPtr<ChainedIncludesSource> source(new ChainedIncludesSource());
InputKind IK = CI.getFrontendOpts().Inputs[0].Kind;
SmallVector<llvm::MemoryBuffer *, 4> serialBufs;
SmallVector<std::string, 4> serialBufNames;
for (unsigned i = 0, e = includes.size(); i != e; ++i) {
bool firstInclude = (i == 0);
OwningPtr<CompilerInvocation> CInvok;
CInvok.reset(new CompilerInvocation(CI.getInvocation()));
CInvok->getPreprocessorOpts().ChainedIncludes.clear();
CInvok->getPreprocessorOpts().ImplicitPCHInclude.clear();
CInvok->getPreprocessorOpts().ImplicitPTHInclude.clear();
CInvok->getPreprocessorOpts().DisablePCHValidation = true;
CInvok->getPreprocessorOpts().Includes.clear();
CInvok->getPreprocessorOpts().MacroIncludes.clear();
CInvok->getPreprocessorOpts().Macros.clear();
CInvok->getFrontendOpts().Inputs.clear();
CInvok->getFrontendOpts().Inputs.push_back(FrontendInputFile(includes[i],
IK));
TextDiagnosticPrinter *DiagClient =
new TextDiagnosticPrinter(llvm::errs(), DiagnosticOptions());
IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
IntrusiveRefCntPtr<DiagnosticsEngine> Diags(
new DiagnosticsEngine(DiagID, DiagClient));
OwningPtr<CompilerInstance> Clang(new CompilerInstance());
Clang->setInvocation(CInvok.take());
Clang->setDiagnostics(Diags.getPtr());
Clang->setTarget(TargetInfo::CreateTargetInfo(Clang->getDiagnostics(),
Clang->getTargetOpts()));
Clang->createFileManager();
Clang->createSourceManager(Clang->getFileManager());
Clang->createPreprocessor();
Clang->getDiagnosticClient().BeginSourceFile(Clang->getLangOpts(),
&Clang->getPreprocessor());
Clang->createASTContext();
SmallVector<char, 256> serialAST;
llvm::raw_svector_ostream OS(serialAST);
OwningPtr<ASTConsumer> consumer;
consumer.reset(new PCHGenerator(Clang->getPreprocessor(), "-", 0,
/*isysroot=*/"", &OS));
Clang->getASTContext().setASTMutationListener(
consumer->GetASTMutationListener());
Clang->setASTConsumer(consumer.take());
Clang->createSema(TU_Prefix, 0);
if (firstInclude) {
Preprocessor &PP = Clang->getPreprocessor();
PP.getBuiltinInfo().InitializeBuiltins(PP.getIdentifierTable(),
PP.getLangOpts());
} else {
assert(!serialBufs.empty());
SmallVector<llvm::MemoryBuffer *, 4> bufs;
for (unsigned si = 0, se = serialBufs.size(); si != se; ++si) {
bufs.push_back(llvm::MemoryBuffer::getMemBufferCopy(
StringRef(serialBufs[si]->getBufferStart(),
serialBufs[si]->getBufferSize())));
}
std::string pchName = includes[i-1];
llvm::raw_string_ostream os(pchName);
os << ".pch" << i-1;
os.flush();
serialBufNames.push_back(pchName);
OwningPtr<ExternalASTSource> Reader;
Reader.reset(createASTReader(*Clang, pchName, bufs, serialBufNames,
Clang->getASTConsumer().GetASTDeserializationListener()));
if (!Reader)
return 0;
Clang->getASTContext().setExternalSource(Reader);
}
if (!Clang->InitializeSourceManager(includes[i]))
return 0;
ParseAST(Clang->getSema());
OS.flush();
Clang->getDiagnosticClient().EndSourceFile();
serialBufs.push_back(
llvm::MemoryBuffer::getMemBufferCopy(StringRef(serialAST.data(),
serialAST.size())));
source->CIs.push_back(Clang.take());
}
assert(!serialBufs.empty());
std::string pchName = includes.back() + ".pch-final";
serialBufNames.push_back(pchName);
OwningPtr<ASTReader> Reader;
Reader.reset(createASTReader(CI, pchName, serialBufs, serialBufNames));
if (!Reader)
return 0;
source->FinalReader.reset(Reader.take());
return source.take();
}
//===----------------------------------------------------------------------===//
// ExternalASTSource interface.
//===----------------------------------------------------------------------===//
Decl *ChainedIncludesSource::GetExternalDecl(uint32_t ID) {
return getFinalReader().GetExternalDecl(ID);
}
Selector ChainedIncludesSource::GetExternalSelector(uint32_t ID) {
return getFinalReader().GetExternalSelector(ID);
}
uint32_t ChainedIncludesSource::GetNumExternalSelectors() {
return getFinalReader().GetNumExternalSelectors();
}
Stmt *ChainedIncludesSource::GetExternalDeclStmt(uint64_t Offset) {
return getFinalReader().GetExternalDeclStmt(Offset);
}
CXXBaseSpecifier *
ChainedIncludesSource::GetExternalCXXBaseSpecifiers(uint64_t Offset) {
return getFinalReader().GetExternalCXXBaseSpecifiers(Offset);
}
DeclContextLookupResult
ChainedIncludesSource::FindExternalVisibleDeclsByName(const DeclContext *DC,
DeclarationName Name) {
return getFinalReader().FindExternalVisibleDeclsByName(DC, Name);
}
ExternalLoadResult
ChainedIncludesSource::FindExternalLexicalDecls(const DeclContext *DC,
bool (*isKindWeWant)(Decl::Kind),
SmallVectorImpl<Decl*> &Result) {
return getFinalReader().FindExternalLexicalDecls(DC, isKindWeWant, Result);
}
void ChainedIncludesSource::CompleteType(TagDecl *Tag) {
return getFinalReader().CompleteType(Tag);
}
void ChainedIncludesSource::CompleteType(ObjCInterfaceDecl *Class) {
return getFinalReader().CompleteType(Class);
}
void ChainedIncludesSource::StartedDeserializing() {
return getFinalReader().StartedDeserializing();
}
void ChainedIncludesSource::FinishedDeserializing() {
return getFinalReader().FinishedDeserializing();
}
void ChainedIncludesSource::StartTranslationUnit(ASTConsumer *Consumer) {
return getFinalReader().StartTranslationUnit(Consumer);
}
void ChainedIncludesSource::PrintStats() {
return getFinalReader().PrintStats();
}
void ChainedIncludesSource::getMemoryBufferSizes(MemoryBufferSizes &sizes)const{
for (unsigned i = 0, e = CIs.size(); i != e; ++i) {
if (const ExternalASTSource *eSrc =
CIs[i]->getASTContext().getExternalSource()) {
eSrc->getMemoryBufferSizes(sizes);
}
}
getFinalReader().getMemoryBufferSizes(sizes);
}
void ChainedIncludesSource::InitializeSema(Sema &S) {
return getFinalReader().InitializeSema(S);
}
void ChainedIncludesSource::ForgetSema() {
return getFinalReader().ForgetSema();
}
void ChainedIncludesSource::ReadMethodPool(Selector Sel) {
getFinalReader().ReadMethodPool(Sel);
}
bool ChainedIncludesSource::LookupUnqualified(LookupResult &R, Scope *S) {
return getFinalReader().LookupUnqualified(R, S);
}
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