1 files changed, 160 insertions, 0 deletions
diff --git a/gnu/llvm/lldb/unittests/Expression/CppModuleConfigurationTest.cpp b/gnu/llvm/lldb/unittests/Expression/CppModuleConfigurationTest.cpp
new file mode 100644
index 00000000000..7ef66f60cfb
--- /dev/null
+++ b/gnu/llvm/lldb/unittests/Expression/CppModuleConfigurationTest.cpp
@@ -0,0 +1,160 @@
+//===-- CppModuleConfigurationTest.cpp ---------------------------*- C++-*-===//
+//
+// 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 {
+  SubsystemRAII<FileSystem, HostInfo> subsystems;
+};
+} // 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 resource_dir.str().str();
+}
+
+/// Utility function turningn a list of paths into a FileSpecList.
+static FileSpecList makeFiles(llvm::ArrayRef<std::string> paths) {
+  FileSpecList result;
+  for (const std::string &path : paths)
+    result.Append(FileSpec(path, FileSpec::Style::posix));
+  return result;
+}
+
+TEST_F(CppModuleConfigurationTest, Linux) {
+  // Test the average Linux configuration.
+  std::string libcpp = "/usr/include/c++/v1";
+  std::string usr = "/usr/include";
+  CppModuleConfiguration config(
+      makeFiles({usr + "/bits/types.h", libcpp + "/vector"}));
+  EXPECT_THAT(config.GetImportedModules(), testing::ElementsAre("std"));
+  EXPECT_THAT(config.GetIncludeDirs(),
+              testing::ElementsAre(libcpp, ResourceInc(), usr));
+}
+
+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";
+  CppModuleConfiguration config(
+      makeFiles({usr + "/bits/types.h", libcpp + "/vector"}));
+  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 libcpp = "/home/user/llvm-build/include/c++/v1";
+  std::string usr = "/usr/include";
+  CppModuleConfiguration config(
+      makeFiles({usr + "/bits/types.h", libcpp + "/vector"}));
+  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 libcpp = "/home/user/llvm-build/include/c++/v1";
+  std::string usr = "/usr/include";
+  CppModuleConfiguration config(makeFiles(
+      {usr + "/bits/types.h", libcpp + "/vector", usr + "/boost/vector"}));
+  EXPECT_THAT(config.GetImportedModules(), testing::ElementsAre("std"));
+  EXPECT_THAT(config.GetIncludeDirs(),
+              testing::ElementsAre(libcpp, ResourceInc(), usr));
+}
+
+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";
+  CppModuleConfiguration config(
+      makeFiles({libcpp + "/unordered_map", usr + "/stdio.h"}));
+  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.
+  CppModuleConfiguration config(
+      makeFiles({"/usr/include/bits/types.h", "/usr/include/c++/v2/vector"}));
+  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.
+  CppModuleConfiguration config(makeFiles(
+      {"/usr/include/bits/types.h", "/usr/include/c++/v1/non_existing_file"}));
+  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.
+  CppModuleConfiguration config(makeFiles({"/usr/include/c++/v1/vector"}));
+  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++.
+  CppModuleConfiguration config(makeFiles({"/usr/include/bits/types.h"}));
+  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.
+  CppModuleConfiguration config(makeFiles(
+      {"/usr/include/bits/types.h", "/usr/include/c++/8.0.1/vector"}));
+  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.
+  CppModuleConfiguration config(
+      makeFiles({"/usr/include/bits/types.h", "/usr/include/c++/v1/vector",
+                 "/sysroot/usr/include/bits/types.h"}));
+  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.
+  CppModuleConfiguration config(
+      makeFiles({"/usr/include/bits/types.h", "/usr/include/c++/v1/vector",
+                 "/usr/include/c++/v2/vector"}));
+  EXPECT_THAT(config.GetImportedModules(), testing::ElementsAre());
+  EXPECT_THAT(config.GetIncludeDirs(), testing::ElementsAre());
+}