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//===- unittests/Frontend/ASTUnitTest.cpp - ASTUnit tests -----------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
#include <fstream>
#include "clang/Basic/FileManager.h"
#include "clang/Frontend/ASTUnit.h"
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Frontend/CompilerInvocation.h"
#include "clang/Frontend/PCHContainerOperations.h"
#include "clang/Lex/HeaderSearch.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/ToolOutputFile.h"
#include "gtest/gtest.h"
using namespace llvm;
using namespace clang;
namespace {
class ASTUnitTest : public ::testing::Test {
protected:
int FD;
llvm::SmallString<256> InputFileName;
std::unique_ptr<ToolOutputFile> input_file;
IntrusiveRefCntPtr<DiagnosticsEngine> Diags;
std::shared_ptr<CompilerInvocation> CInvok;
std::shared_ptr<PCHContainerOperations> PCHContainerOps;
std::unique_ptr<ASTUnit> createASTUnit(bool isVolatile) {
EXPECT_FALSE(llvm::sys::fs::createTemporaryFile("ast-unit", "cpp", FD,
InputFileName));
input_file = std::make_unique<ToolOutputFile>(InputFileName, FD);
input_file->os() << "";
const char *Args[] = {"clang", "-xc++", InputFileName.c_str()};
Diags = CompilerInstance::createDiagnostics(new DiagnosticOptions());
CInvok = createInvocationFromCommandLine(Args, Diags);
if (!CInvok)
return nullptr;
FileManager *FileMgr =
new FileManager(FileSystemOptions(), vfs::getRealFileSystem());
PCHContainerOps = std::make_shared<PCHContainerOperations>();
return ASTUnit::LoadFromCompilerInvocation(
CInvok, PCHContainerOps, Diags, FileMgr, false, CaptureDiagsKind::None,
0, TU_Complete, false, false, isVolatile);
}
};
TEST_F(ASTUnitTest, SaveLoadPreservesLangOptionsInPrintingPolicy) {
// Check that the printing policy is restored with the correct language
// options when loading an ASTUnit from a file. To this end, an ASTUnit
// for a C++ translation unit is set up and written to a temporary file.
// By default `UseVoidForZeroParams` is true for non-C++ language options,
// thus we can check this field after loading the ASTUnit to deduce whether
// the correct (C++) language options were used when setting up the printing
// policy.
{
PrintingPolicy PolicyWithDefaultLangOpt(LangOptions{});
EXPECT_TRUE(PolicyWithDefaultLangOpt.UseVoidForZeroParams);
}
std::unique_ptr<ASTUnit> AST = createASTUnit(false);
if (!AST)
FAIL() << "failed to create ASTUnit";
EXPECT_FALSE(AST->getASTContext().getPrintingPolicy().UseVoidForZeroParams);
llvm::SmallString<256> ASTFileName;
ASSERT_FALSE(
llvm::sys::fs::createTemporaryFile("ast-unit", "ast", FD, ASTFileName));
ToolOutputFile ast_file(ASTFileName, FD);
AST->Save(ASTFileName.str());
EXPECT_TRUE(llvm::sys::fs::exists(ASTFileName));
std::unique_ptr<ASTUnit> AU = ASTUnit::LoadFromASTFile(
std::string(ASTFileName.str()), PCHContainerOps->getRawReader(),
ASTUnit::LoadEverything, Diags, FileSystemOptions(),
/*UseDebugInfo=*/false);
if (!AU)
FAIL() << "failed to load ASTUnit";
EXPECT_FALSE(AU->getASTContext().getPrintingPolicy().UseVoidForZeroParams);
}
TEST_F(ASTUnitTest, GetBufferForFileMemoryMapping) {
std::unique_ptr<ASTUnit> AST = createASTUnit(true);
if (!AST)
FAIL() << "failed to create ASTUnit";
std::unique_ptr<llvm::MemoryBuffer> memoryBuffer =
AST->getBufferForFile(InputFileName);
EXPECT_NE(memoryBuffer->getBufferKind(),
llvm::MemoryBuffer::MemoryBuffer_MMap);
}
TEST_F(ASTUnitTest, ModuleTextualHeader) {
llvm::IntrusiveRefCntPtr<llvm::vfs::InMemoryFileSystem> InMemoryFs =
new llvm::vfs::InMemoryFileSystem();
InMemoryFs->addFile("test.cpp", 0, llvm::MemoryBuffer::getMemBuffer(R"cpp(
#include "Textual.h"
void foo() {}
)cpp"));
InMemoryFs->addFile("m.modulemap", 0, llvm::MemoryBuffer::getMemBuffer(R"cpp(
module M {
module Textual {
textual header "Textual.h"
}
}
)cpp"));
InMemoryFs->addFile("Textual.h", 0, llvm::MemoryBuffer::getMemBuffer(R"cpp(
void foo();
)cpp"));
const char *Args[] = {"clang", "test.cpp", "-fmodule-map-file=m.modulemap",
"-fmodule-name=M"};
Diags = CompilerInstance::createDiagnostics(new DiagnosticOptions());
CInvok = createInvocationFromCommandLine(Args, Diags);
ASSERT_TRUE(CInvok);
FileManager *FileMgr = new FileManager(FileSystemOptions(), InMemoryFs);
PCHContainerOps = std::make_shared<PCHContainerOperations>();
auto AU = ASTUnit::LoadFromCompilerInvocation(
CInvok, PCHContainerOps, Diags, FileMgr, false, CaptureDiagsKind::None, 1,
TU_Complete, false, false, false);
ASSERT_TRUE(AU);
auto File = AU->getFileManager().getFileRef("Textual.h", false, false);
ASSERT_TRUE(bool(File));
// Verify that we do not crash here.
EXPECT_TRUE(AU->getPreprocessor().getHeaderSearchInfo().getExistingFileInfo(
&File->getFileEntry()));
}
TEST_F(ASTUnitTest, LoadFromCommandLineEarlyError) {
EXPECT_FALSE(
llvm::sys::fs::createTemporaryFile("ast-unit", "c", FD, InputFileName));
input_file = std::make_unique<ToolOutputFile>(InputFileName, FD);
input_file->os() << "";
const char *Args[] = {"clang", "-target", "foobar", InputFileName.c_str()};
auto Diags = CompilerInstance::createDiagnostics(new DiagnosticOptions());
auto PCHContainerOps = std::make_shared<PCHContainerOperations>();
std::unique_ptr<clang::ASTUnit> ErrUnit;
ASTUnit *AST = ASTUnit::LoadFromCommandLine(
&Args[0], &Args[4], PCHContainerOps, Diags, "", false,
CaptureDiagsKind::All, None, true, 0, TU_Complete, false, false, false,
SkipFunctionBodiesScope::None, false, true, false, false, None, &ErrUnit,
nullptr);
ASSERT_EQ(AST, nullptr);
ASSERT_NE(ErrUnit, nullptr);
ASSERT_TRUE(Diags->hasErrorOccurred());
ASSERT_NE(ErrUnit->stored_diag_size(), 0U);
}
} // anonymous namespace
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