std::unique_ptr<CompilerInstance>
prepareCompilerInstance(std::unique_ptr<clang::CompilerInvocation> CI,
const PrecompiledPreamble *Preamble,
std::unique_ptr<llvm::MemoryBuffer> Buffer,
std::shared_ptr<PCHContainerOperations> PCHs,
IntrusiveRefCntPtr<vfs::FileSystem> VFS,
DiagnosticConsumer &DiagsClient) {
assert(VFS && "VFS is null");
assert(!CI->getPreprocessorOpts().RetainRemappedFileBuffers &&
"Setting RetainRemappedFileBuffers to true will cause a memory leak "
"of ContentsBuffer");
// NOTE: we use Buffer.get() when adding remapped files, so we have to make
// sure it will be released if no error is emitted.
if (Preamble) {
Preamble->OverridePreamble(*CI, VFS, Buffer.get());
} else {
CI->getPreprocessorOpts().addRemappedFile(
CI->getFrontendOpts().Inputs[0].getFile(), Buffer.get());
}
auto Clang = llvm::make_unique<CompilerInstance>(PCHs);
Clang->setInvocation(std::move(CI));
Clang->createDiagnostics(&DiagsClient, false);
if (auto VFSWithRemapping = createVFSFromCompilerInvocation(
Clang->getInvocation(), Clang->getDiagnostics(), VFS))
VFS = VFSWithRemapping;
Clang->setVirtualFileSystem(VFS);
Clang->setTarget(TargetInfo::CreateTargetInfo(
Clang->getDiagnostics(), Clang->getInvocation().TargetOpts));
if (!Clang->hasTarget())
return nullptr;
// RemappedFileBuffers will handle the lifetime of the Buffer pointer,
// release it.
Buffer.release();
return Clang;
}
std::unique_ptr<CompilerInstance>
BuildCompilerInstance(ArrayRef<const char *> ClangArgv) {
auto Ins = llvm::make_unique<CompilerInstance>();
auto DC = llvm::make_unique<TestDiagnosticConsumer>();
const bool ShouldOwnClient = true;
Ins->createDiagnostics(DC.release(), ShouldOwnClient);
auto Inv = llvm::make_unique<CompilerInvocation>();
CompilerInvocation::CreateFromArgs(*Inv, ClangArgv.data(),
&ClangArgv.data()[ClangArgv.size()],
Ins->getDiagnostics());
Inv->getLangOpts()->CPlusPlus = true;
Inv->getLangOpts()->CPlusPlus11 = true;
Inv->getHeaderSearchOpts().UseLibcxx = true;
Inv->getLangOpts()->Bool = true;
Inv->getLangOpts()->WChar = true;
Inv->getLangOpts()->Blocks = true;
Inv->getLangOpts()->DebuggerSupport = true;
Inv->getLangOpts()->SpellChecking = false;
Inv->getLangOpts()->ThreadsafeStatics = false;
Inv->getLangOpts()->AccessControl = false;
Inv->getLangOpts()->DollarIdents = true;
Inv->getCodeGenOpts().setDebugInfo(codegenoptions::FullDebugInfo);
Inv->getTargetOpts().Triple = llvm::sys::getDefaultTargetTriple();
Ins->setInvocation(Inv.release());
TargetInfo *TI = TargetInfo::CreateTargetInfo(
Ins->getDiagnostics(), Ins->getInvocation().TargetOpts);
Ins->setTarget(TI);
Ins->getTarget().adjust(Ins->getLangOpts());
Ins->createFileManager();
Ins->createSourceManager(Ins->getFileManager());
Ins->createPreprocessor(TU_Complete);
return Ins;
}