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//===- unittest/AST/ASTImporterFixtures.cpp - AST unit test support -------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
/// \file
/// Implementation of fixture classes for testing the ASTImporter.
//
//===----------------------------------------------------------------------===//
#include "ASTImporterFixtures.h"
#include "clang/AST/ASTImporter.h"
#include "clang/AST/ASTImporterLookupTable.h"
#include "clang/Frontend/ASTUnit.h"
#include "clang/Tooling/Tooling.h"
namespace clang {
namespace ast_matchers {
void createVirtualFileIfNeeded(ASTUnit *ToAST, StringRef FileName,
std::unique_ptr<llvm::MemoryBuffer> &&Buffer) {
assert(ToAST);
ASTContext &ToCtx = ToAST->getASTContext();
auto *OFS = static_cast<llvm::vfs::OverlayFileSystem *>(
&ToCtx.getSourceManager().getFileManager().getVirtualFileSystem());
auto *MFS = static_cast<llvm::vfs::InMemoryFileSystem *>(
OFS->overlays_begin()->get());
MFS->addFile(FileName, 0, std::move(Buffer));
}
void createVirtualFileIfNeeded(ASTUnit *ToAST, StringRef FileName,
StringRef Code) {
return createVirtualFileIfNeeded(ToAST, FileName,
llvm::MemoryBuffer::getMemBuffer(Code));
}
ASTImporterTestBase::TU::TU(StringRef Code, StringRef FileName, ArgVector Args,
ImporterConstructor C)
: Code(Code), FileName(FileName),
Unit(tooling::buildASTFromCodeWithArgs(this->Code, Args, this->FileName)),
TUDecl(Unit->getASTContext().getTranslationUnitDecl()), Creator(C) {
Unit->enableSourceFileDiagnostics();
// If the test doesn't need a specific ASTImporter, we just create a
// normal ASTImporter with it.
if (!Creator)
Creator = [](ASTContext &ToContext, FileManager &ToFileManager,
ASTContext &FromContext, FileManager &FromFileManager,
bool MinimalImport, ASTImporterLookupTable *LookupTable) {
return new ASTImporter(ToContext, ToFileManager, FromContext,
FromFileManager, MinimalImport, LookupTable);
};
}
ASTImporterTestBase::TU::~TU() {}
void ASTImporterTestBase::TU::lazyInitImporter(
ASTImporterLookupTable &LookupTable, ASTUnit *ToAST) {
assert(ToAST);
if (!Importer)
Importer.reset(Creator(ToAST->getASTContext(), ToAST->getFileManager(),
Unit->getASTContext(), Unit->getFileManager(), false,
&LookupTable));
assert(&ToAST->getASTContext() == &Importer->getToContext());
createVirtualFileIfNeeded(ToAST, FileName, Code);
}
Decl *ASTImporterTestBase::TU::import(ASTImporterLookupTable &LookupTable,
ASTUnit *ToAST, Decl *FromDecl) {
lazyInitImporter(LookupTable, ToAST);
if (auto ImportedOrErr = Importer->Import(FromDecl))
return *ImportedOrErr;
else {
llvm::consumeError(ImportedOrErr.takeError());
return nullptr;
}
}
QualType ASTImporterTestBase::TU::import(ASTImporterLookupTable &LookupTable,
ASTUnit *ToAST, QualType FromType) {
lazyInitImporter(LookupTable, ToAST);
if (auto ImportedOrErr = Importer->Import(FromType))
return *ImportedOrErr;
else {
llvm::consumeError(ImportedOrErr.takeError());
return QualType{};
}
}
void ASTImporterTestBase::lazyInitLookupTable(TranslationUnitDecl *ToTU) {
assert(ToTU);
if (!LookupTablePtr)
LookupTablePtr = llvm::make_unique<ASTImporterLookupTable>(*ToTU);
}
void ASTImporterTestBase::lazyInitToAST(Language ToLang, StringRef ToSrcCode,
StringRef FileName) {
if (ToAST)
return;
ArgVector ToArgs = getArgVectorForLanguage(ToLang);
// Source code must be a valid live buffer through the tests lifetime.
ToCode = ToSrcCode;
// Build the AST from an empty file.
ToAST = tooling::buildASTFromCodeWithArgs(ToCode, ToArgs, FileName);
ToAST->enableSourceFileDiagnostics();
lazyInitLookupTable(ToAST->getASTContext().getTranslationUnitDecl());
}
ASTImporterTestBase::TU *ASTImporterTestBase::findFromTU(Decl *From) {
// Create a virtual file in the To Ctx which corresponds to the file from
// which we want to import the `From` Decl. Without this source locations
// will be invalid in the ToCtx.
auto It = llvm::find_if(FromTUs, [From](const TU &E) {
return E.TUDecl == From->getTranslationUnitDecl();
});
assert(It != FromTUs.end());
return &*It;
}
std::tuple<Decl *, Decl *>
ASTImporterTestBase::getImportedDecl(StringRef FromSrcCode, Language FromLang,
StringRef ToSrcCode, Language ToLang,
StringRef Identifier) {
ArgVector FromArgs = getArgVectorForLanguage(FromLang),
ToArgs = getArgVectorForLanguage(ToLang);
FromTUs.emplace_back(FromSrcCode, InputFileName, FromArgs, Creator);
TU &FromTU = FromTUs.back();
assert(!ToAST);
lazyInitToAST(ToLang, ToSrcCode, OutputFileName);
ASTContext &FromCtx = FromTU.Unit->getASTContext();
IdentifierInfo *ImportedII = &FromCtx.Idents.get(Identifier);
assert(ImportedII && "Declaration with the given identifier "
"should be specified in test!");
DeclarationName ImportDeclName(ImportedII);
SmallVector<NamedDecl *, 1> FoundDecls;
FromCtx.getTranslationUnitDecl()->localUncachedLookup(ImportDeclName,
FoundDecls);
assert(FoundDecls.size() == 1);
Decl *Imported =
FromTU.import(*LookupTablePtr, ToAST.get(), FoundDecls.front());
assert(Imported);
return std::make_tuple(*FoundDecls.begin(), Imported);
}
TranslationUnitDecl *ASTImporterTestBase::getTuDecl(StringRef SrcCode,
Language Lang,
StringRef FileName) {
assert(llvm::find_if(FromTUs, [FileName](const TU &E) {
return E.FileName == FileName;
}) == FromTUs.end());
ArgVector Args = getArgVectorForLanguage(Lang);
FromTUs.emplace_back(SrcCode, FileName, Args);
TU &Tu = FromTUs.back();
return Tu.TUDecl;
}
TranslationUnitDecl *ASTImporterTestBase::getToTuDecl(StringRef ToSrcCode,
Language ToLang) {
ArgVector ToArgs = getArgVectorForLanguage(ToLang);
assert(!ToAST);
lazyInitToAST(ToLang, ToSrcCode, OutputFileName);
return ToAST->getASTContext().getTranslationUnitDecl();
}
Decl *ASTImporterTestBase::Import(Decl *From, Language ToLang) {
lazyInitToAST(ToLang, "", OutputFileName);
TU *FromTU = findFromTU(From);
assert(LookupTablePtr);
return FromTU->import(*LookupTablePtr, ToAST.get(), From);
}
QualType ASTImporterTestBase::ImportType(QualType FromType, Decl *TUDecl,
Language ToLang) {
lazyInitToAST(ToLang, "", OutputFileName);
TU *FromTU = findFromTU(TUDecl);
assert(LookupTablePtr);
return FromTU->import(*LookupTablePtr, ToAST.get(), FromType);
}
ASTImporterTestBase::~ASTImporterTestBase() {
if (!::testing::Test::HasFailure())
return;
for (auto &Tu : FromTUs) {
assert(Tu.Unit);
llvm::errs() << "FromAST:\n";
Tu.Unit->getASTContext().getTranslationUnitDecl()->dump();
llvm::errs() << "\n";
}
if (ToAST) {
llvm::errs() << "ToAST:\n";
ToAST->getASTContext().getTranslationUnitDecl()->dump();
}
}
} // end namespace ast_matchers
} // end namespace clang
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