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//===-- CppModuleConfigurationTest.cpp ------------------------------------===//
//
// 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 "Plugins/ExpressionParser/Clang/CppModuleConfiguration.h"
#include "Plugins/ExpressionParser/Clang/ClangHost.h"
#include "TestingSupport/SubsystemRAII.h"
#include "lldb/Host/FileSystem.h"
#include "lldb/Host/HostInfo.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
using namespace lldb_private;
namespace {
struct CppModuleConfigurationTest : public testing::Test {
llvm::MemoryBufferRef m_empty_buffer;
llvm::IntrusiveRefCntPtr<llvm::vfs::InMemoryFileSystem> m_fs;
CppModuleConfigurationTest()
: m_empty_buffer("", "<empty buffer>"),
m_fs(new llvm::vfs::InMemoryFileSystem()) {}
void SetUp() override {
FileSystem::Initialize(m_fs);
HostInfo::Initialize();
}
void TearDown() override {
HostInfo::Terminate();
FileSystem::Terminate();
}
/// Utility function turning a list of paths into a FileSpecList.
FileSpecList makeFiles(llvm::ArrayRef<std::string> paths) {
FileSpecList result;
for (const std::string &path : paths) {
result.Append(FileSpec(path, FileSpec::Style::posix));
if (!m_fs->addFileNoOwn(path, static_cast<time_t>(0), m_empty_buffer))
llvm_unreachable("Invalid test configuration?");
}
return result;
}
};
} // namespace
/// Returns the Clang resource include directory.
static std::string ResourceInc() {
llvm::SmallString<256> resource_dir;
llvm::sys::path::append(resource_dir, GetClangResourceDir().GetPath(),
"include");
return std::string(resource_dir);
}
TEST_F(CppModuleConfigurationTest, Linux) {
// Test the average Linux configuration.
std::string usr = "/usr/include";
std::string libcpp = "/usr/include/c++/v1";
std::vector<std::string> files = {// C library
usr + "/stdio.h",
// C++ library
libcpp + "/vector",
libcpp + "/module.modulemap"};
CppModuleConfiguration config(makeFiles(files), llvm::Triple());
EXPECT_THAT(config.GetImportedModules(), testing::ElementsAre("std"));
EXPECT_THAT(config.GetIncludeDirs(),
testing::ElementsAre(libcpp, ResourceInc(), usr));
}
TEST_F(CppModuleConfigurationTest, LinuxTargetSpecificInclude) {
// Test the average Linux configuration.
std::string usr = "/usr/include";
std::string usr_target = "/usr/include/x86_64-linux-gnu";
std::string libcpp = "/usr/include/c++/v1";
std::string libcpp_target = "/usr/include/x86_64-unknown-linux-gnu/c++/v1";
std::vector<std::string> files = {
// C library
usr + "/stdio.h", usr_target + "/sys/cdefs.h",
// C++ library
libcpp + "/vector", libcpp + "/module.modulemap"};
CppModuleConfiguration config(makeFiles(files),
llvm::Triple("x86_64-unknown-linux-gnu"));
EXPECT_THAT(config.GetImportedModules(), testing::ElementsAre("std"));
EXPECT_THAT(config.GetIncludeDirs(),
testing::ElementsAre(libcpp, ResourceInc(), usr, usr_target,
libcpp_target));
}
TEST_F(CppModuleConfigurationTest, Sysroot) {
// Test that having a sysroot for the whole system works fine.
std::string libcpp = "/home/user/sysroot/usr/include/c++/v1";
std::string usr = "/home/user/sysroot/usr/include";
std::vector<std::string> files = {// C library
usr + "/stdio.h",
// C++ library
libcpp + "/vector",
libcpp + "/module.modulemap"};
CppModuleConfiguration config(makeFiles(files), llvm::Triple());
EXPECT_THAT(config.GetImportedModules(), testing::ElementsAre("std"));
EXPECT_THAT(config.GetIncludeDirs(),
testing::ElementsAre(libcpp, ResourceInc(), usr));
}
TEST_F(CppModuleConfigurationTest, LinuxLocalLibCpp) {
// Test that a locally build libc++ is detected.
std::string usr = "/usr/include";
std::string libcpp = "/home/user/llvm-build/include/c++/v1";
std::vector<std::string> files = {// C library
usr + "/stdio.h",
// C++ library
libcpp + "/vector",
libcpp + "/module.modulemap"};
CppModuleConfiguration config(makeFiles(files), llvm::Triple());
EXPECT_THAT(config.GetImportedModules(), testing::ElementsAre("std"));
EXPECT_THAT(config.GetIncludeDirs(),
testing::ElementsAre(libcpp, ResourceInc(), usr));
}
TEST_F(CppModuleConfigurationTest, UnrelatedLibrary) {
// Test that having an unrelated library in /usr/include doesn't break.
std::string usr = "/usr/include";
std::string libcpp = "/home/user/llvm-build/include/c++/v1";
std::vector<std::string> files = {// C library
usr + "/stdio.h",
// unrelated library
usr + "/boost/vector",
// C++ library
libcpp + "/vector",
libcpp + "/module.modulemap"};
CppModuleConfiguration config(makeFiles(files), llvm::Triple());
EXPECT_THAT(config.GetImportedModules(), testing::ElementsAre("std"));
EXPECT_THAT(config.GetIncludeDirs(),
testing::ElementsAre(libcpp, ResourceInc(), usr));
}
TEST_F(CppModuleConfigurationTest, UnrelatedLibraryWithTargetSpecificInclude) {
// Test that having an unrelated library in /usr/include doesn't break.
std::string usr = "/usr/include";
std::string libcpp = "/home/user/llvm-build/include/c++/v1";
std::string libcpp_target =
"/home/user/llvm-build/include/x86_64-unknown-linux-gnu/c++/v1";
std::vector<std::string> files = {// C library
usr + "/stdio.h",
// unrelated library
usr + "/boost/vector",
// C++ library
libcpp + "/vector",
libcpp + "/module.modulemap"};
CppModuleConfiguration config(makeFiles(files),
llvm::Triple("x86_64-unknown-linux-gnu"));
EXPECT_THAT(config.GetImportedModules(), testing::ElementsAre("std"));
EXPECT_THAT(config.GetIncludeDirs(),
testing::ElementsAre(libcpp, ResourceInc(), usr, libcpp_target));
}
TEST_F(CppModuleConfigurationTest, Xcode) {
// Test detection of libc++ coming from Xcode with generic platform names.
std::string p = "/Applications/Xcode.app/Contents/Developer/";
std::string libcpp = p + "Toolchains/B.xctoolchain/usr/include/c++/v1";
std::string usr =
p + "Platforms/A.platform/Developer/SDKs/OSVers.sdk/usr/include";
std::vector<std::string> files = {
// C library
usr + "/stdio.h",
// C++ library
libcpp + "/vector",
libcpp + "/module.modulemap",
};
CppModuleConfiguration config(makeFiles(files), llvm::Triple());
EXPECT_THAT(config.GetImportedModules(), testing::ElementsAre("std"));
EXPECT_THAT(config.GetIncludeDirs(),
testing::ElementsAre(libcpp, ResourceInc(), usr));
}
TEST_F(CppModuleConfigurationTest, LibCppV2) {
// Test that a "v2" of libc++ is still correctly detected.
std::string libcpp = "/usr/include/c++/v2";
std::vector<std::string> files = {// C library
"/usr/include/stdio.h",
// C++ library
libcpp + "/vector",
libcpp + "/module.modulemap"};
CppModuleConfiguration config(makeFiles(files), llvm::Triple());
EXPECT_THAT(config.GetImportedModules(), testing::ElementsAre("std"));
EXPECT_THAT(config.GetIncludeDirs(),
testing::ElementsAre("/usr/include/c++/v2", ResourceInc(),
"/usr/include"));
}
TEST_F(CppModuleConfigurationTest, UnknownLibCppFile) {
// Test that having some unknown file in the libc++ path doesn't break
// anything.
std::string libcpp = "/usr/include/c++/v1";
std::vector<std::string> files = {// C library
"/usr/include/stdio.h",
// C++ library
libcpp + "/non_existing_file",
libcpp + "/module.modulemap",
libcpp + "/vector"};
CppModuleConfiguration config(makeFiles(files), llvm::Triple());
EXPECT_THAT(config.GetImportedModules(), testing::ElementsAre("std"));
EXPECT_THAT(config.GetIncludeDirs(),
testing::ElementsAre("/usr/include/c++/v1", ResourceInc(),
"/usr/include"));
}
TEST_F(CppModuleConfigurationTest, MissingUsrInclude) {
// Test that we don't load 'std' if we can't find the C standard library.
std::string libcpp = "/usr/include/c++/v1";
std::vector<std::string> files = {// C++ library
libcpp + "/vector",
libcpp + "/module.modulemap"};
CppModuleConfiguration config(makeFiles(files), llvm::Triple());
EXPECT_THAT(config.GetImportedModules(), testing::ElementsAre());
EXPECT_THAT(config.GetIncludeDirs(), testing::ElementsAre());
}
TEST_F(CppModuleConfigurationTest, MissingLibCpp) {
// Test that we don't load 'std' if we don't have a libc++.
std::string usr = "/usr/include";
std::vector<std::string> files = {
// C library
usr + "/stdio.h",
};
CppModuleConfiguration config(makeFiles(files), llvm::Triple());
EXPECT_THAT(config.GetImportedModules(), testing::ElementsAre());
EXPECT_THAT(config.GetIncludeDirs(), testing::ElementsAre());
}
TEST_F(CppModuleConfigurationTest, IgnoreLibStdCpp) {
// Test that we don't do anything bad when we encounter libstdc++ paths.
std::string usr = "/usr/include";
std::vector<std::string> files = {
// C library
usr + "/stdio.h",
// C++ library
usr + "/c++/8.0.1/vector",
};
CppModuleConfiguration config(makeFiles(files), llvm::Triple());
EXPECT_THAT(config.GetImportedModules(), testing::ElementsAre());
EXPECT_THAT(config.GetIncludeDirs(), testing::ElementsAre());
}
TEST_F(CppModuleConfigurationTest, AmbiguousCLib) {
// Test that we don't do anything when we are not sure where the
// right C standard library is.
std::string usr1 = "/usr/include";
std::string usr2 = "/usr/include/other/path";
std::string libcpp = usr1 + "c++/v1";
std::vector<std::string> files = {
// First C library
usr1 + "/stdio.h",
// Second C library
usr2 + "/stdio.h",
// C++ library
libcpp + "/vector",
libcpp + "/module.modulemap",
};
CppModuleConfiguration config(makeFiles(files), llvm::Triple());
EXPECT_THAT(config.GetImportedModules(), testing::ElementsAre());
EXPECT_THAT(config.GetIncludeDirs(), testing::ElementsAre());
}
TEST_F(CppModuleConfigurationTest, AmbiguousLibCpp) {
// Test that we don't do anything when we are not sure where the
// right libc++ is.
std::string usr = "/usr/include";
std::string libcpp1 = usr + "c++/v1";
std::string libcpp2 = usr + "c++/v2";
std::vector<std::string> files = {
// C library
usr + "/stdio.h",
// First C++ library
libcpp1 + "/vector",
libcpp1 + "/module.modulemap",
// Second C++ library
libcpp2 + "/vector",
libcpp2 + "/module.modulemap",
};
CppModuleConfiguration config(makeFiles(files), llvm::Triple());
EXPECT_THAT(config.GetImportedModules(), testing::ElementsAre());
EXPECT_THAT(config.GetIncludeDirs(), testing::ElementsAre());
}
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