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114 lines
3.7 KiB
C++
114 lines
3.7 KiB
C++
//===- unittests/Frontend/ASTUnitTest.cpp - ASTUnit tests -----------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include <fstream>
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#include "clang/Frontend/ASTUnit.h"
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#include "clang/Frontend/CompilerInstance.h"
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#include "clang/Frontend/CompilerInvocation.h"
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#include "clang/Frontend/PCHContainerOperations.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/Path.h"
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#include "llvm/Support/ToolOutputFile.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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using namespace clang;
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namespace {
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class ASTUnitTest : public ::testing::Test {
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protected:
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int FD;
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llvm::SmallString<256> InputFileName;
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std::unique_ptr<ToolOutputFile> input_file;
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IntrusiveRefCntPtr<DiagnosticsEngine> Diags;
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std::shared_ptr<CompilerInvocation> CInvok;
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std::shared_ptr<PCHContainerOperations> PCHContainerOps;
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std::unique_ptr<ASTUnit> createASTUnit(bool isVolatile) {
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EXPECT_FALSE(llvm::sys::fs::createTemporaryFile("ast-unit", "cpp", FD,
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InputFileName));
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input_file = llvm::make_unique<ToolOutputFile>(InputFileName, FD);
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input_file->os() << "";
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const char *Args[] = {"clang", "-xc++", InputFileName.c_str()};
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Diags = CompilerInstance::createDiagnostics(new DiagnosticOptions());
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CInvok = createInvocationFromCommandLine(Args, Diags);
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if (!CInvok)
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return nullptr;
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FileManager *FileMgr =
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new FileManager(FileSystemOptions(), vfs::getRealFileSystem());
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PCHContainerOps = std::make_shared<PCHContainerOperations>();
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return ASTUnit::LoadFromCompilerInvocation(
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CInvok, PCHContainerOps, Diags, FileMgr, false, false, 0, TU_Complete,
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false, false, isVolatile);
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}
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};
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TEST_F(ASTUnitTest, SaveLoadPreservesLangOptionsInPrintingPolicy) {
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// Check that the printing policy is restored with the correct language
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// options when loading an ASTUnit from a file. To this end, an ASTUnit
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// for a C++ translation unit is set up and written to a temporary file.
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// By default `UseVoidForZeroParams` is true for non-C++ language options,
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// thus we can check this field after loading the ASTUnit to deduce whether
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// the correct (C++) language options were used when setting up the printing
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// policy.
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{
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PrintingPolicy PolicyWithDefaultLangOpt(LangOptions{});
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EXPECT_TRUE(PolicyWithDefaultLangOpt.UseVoidForZeroParams);
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}
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std::unique_ptr<ASTUnit> AST = createASTUnit(false);
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if (!AST)
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FAIL() << "failed to create ASTUnit";
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EXPECT_FALSE(AST->getASTContext().getPrintingPolicy().UseVoidForZeroParams);
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llvm::SmallString<256> ASTFileName;
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ASSERT_FALSE(
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llvm::sys::fs::createTemporaryFile("ast-unit", "ast", FD, ASTFileName));
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ToolOutputFile ast_file(ASTFileName, FD);
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AST->Save(ASTFileName.str());
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EXPECT_TRUE(llvm::sys::fs::exists(ASTFileName));
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std::unique_ptr<ASTUnit> AU = ASTUnit::LoadFromASTFile(
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ASTFileName.str(), PCHContainerOps->getRawReader(),
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ASTUnit::LoadEverything, Diags, FileSystemOptions(),
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/*UseDebugInfo=*/false);
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if (!AU)
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FAIL() << "failed to load ASTUnit";
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EXPECT_FALSE(AU->getASTContext().getPrintingPolicy().UseVoidForZeroParams);
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}
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TEST_F(ASTUnitTest, GetBufferForFileMemoryMapping) {
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std::unique_ptr<ASTUnit> AST = createASTUnit(true);
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if (!AST)
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FAIL() << "failed to create ASTUnit";
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std::unique_ptr<llvm::MemoryBuffer> memoryBuffer =
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AST->getBufferForFile(InputFileName);
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EXPECT_NE(memoryBuffer->getBufferKind(),
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llvm::MemoryBuffer::MemoryBuffer_MMap);
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}
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} // anonymous namespace
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