C++ IntrusiveRefCntPtr::get方法代码示例

TEST_F(VFSFromYAMLTest, BasicVFSFromYAML) {
  IntrusiveRefCntPtr<vfs::FileSystem> FS;
  FS = getFromYAMLString("");
  EXPECT_EQ(nullptr, FS.get());
  FS = getFromYAMLString("[]");
  EXPECT_EQ(nullptr, FS.get());
  FS = getFromYAMLString("'string'");
  EXPECT_EQ(nullptr, FS.get());
  EXPECT_EQ(3, NumDiagnostics);
}

TEST_F(VFSFromYAMLTest, UseExternalName) {
  IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
  Lower->addRegularFile("//root/external/file");

  IntrusiveRefCntPtr<vfs::FileSystem> FS = getFromYAMLString(
      "{ 'roots': [\n"
      "  { 'type': 'file', 'name': '//root/A',\n"
      "    'external-contents': '//root/external/file'\n"
      "  },\n"
      "  { 'type': 'file', 'name': '//root/B',\n"
      "    'use-external-name': true,\n"
      "    'external-contents': '//root/external/file'\n"
      "  },\n"
      "  { 'type': 'file', 'name': '//root/C',\n"
      "    'use-external-name': false,\n"
      "    'external-contents': '//root/external/file'\n"
      "  }\n"
      "] }", Lower);
  ASSERT_TRUE(nullptr != FS.get());

  // default true
  EXPECT_EQ("//root/external/file", FS->status("//root/A")->getName());
  // explicit
  EXPECT_EQ("//root/external/file", FS->status("//root/B")->getName());
  EXPECT_EQ("//root/C", FS->status("//root/C")->getName());

  // global configuration
  FS = getFromYAMLString(
      "{ 'use-external-names': false,\n"
      "  'roots': [\n"
      "  { 'type': 'file', 'name': '//root/A',\n"
      "    'external-contents': '//root/external/file'\n"
      "  },\n"
      "  { 'type': 'file', 'name': '//root/B',\n"
      "    'use-external-name': true,\n"
      "    'external-contents': '//root/external/file'\n"
      "  },\n"
      "  { 'type': 'file', 'name': '//root/C',\n"
      "    'use-external-name': false,\n"
      "    'external-contents': '//root/external/file'\n"
      "  }\n"
      "] }", Lower);
  ASSERT_TRUE(nullptr != FS.get());

  // default
  EXPECT_EQ("//root/A", FS->status("//root/A")->getName());
  // explicit
  EXPECT_EQ("//root/external/file", FS->status("//root/B")->getName());
  EXPECT_EQ("//root/C", FS->status("//root/C")->getName());
}

unique_ptr<Module>
#endif
compile(LLVMContext* context, const vector<Chars_const> compileArgs) {
  vector<Chars_const> args = {
    "-Xclang",
    "-resource-dir",
    "-Xclang",
    "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/clang/6.0",
  };
  for (auto const& s : compileArgs) {
    args.push_back(s);
  }
  const IntrusiveRefCntPtr<clang::CompilerInvocation> invocation =
    clang::createInvocationFromCommandLine(args);

  clang::CompilerInstance compiler;
  compiler.setInvocation(invocation.get());
  
  auto diagConsumer = new clang::TextDiagnosticPrinter(errs(), &compiler.getDiagnosticOpts());
  compiler.createDiagnostics(diagConsumer, true); // shouldOwnClient=true.
  
  clang::EmitLLVMOnlyAction action(context);
  check(compiler.ExecuteAction(action), "ExecuteAction failed");
  return action.takeModule();
}

TEST_F(VFSFromYAMLTest, CaseSensitive) {
  IntrusiveRefCntPtr<DummyFileSystem> Lower(new DummyFileSystem());
  Lower->addRegularFile("//root/foo/bar/a");
  IntrusiveRefCntPtr<vfs::FileSystem> FS =
      getFromYAMLString("{ 'case-sensitive': 'true',\n"
                        "  'roots': [\n"
                        "{\n"
                        "  'type': 'directory',\n"
                        "  'name': '//root/',\n"
                        "  'contents': [ {\n"
                        "                  'type': 'file',\n"
                        "                  'name': 'XX',\n"
                        "                  'external-contents': '//root/foo/bar/a'\n"
                        "                }\n"
                        "              ]\n"
                        "}]}",
                        Lower);
  ASSERT_TRUE(FS.get() != nullptr);

  IntrusiveRefCntPtr<vfs::OverlayFileSystem> O(
      new vfs::OverlayFileSystem(Lower));
  O->pushOverlay(FS);

  ErrorOr<vfs::Status> SS = O->status("//root/xx");
  EXPECT_EQ(SS.getError(), llvm::errc::no_such_file_or_directory);
  SS = O->status("//root/xX");
  EXPECT_EQ(SS.getError(), llvm::errc::no_such_file_or_directory);
  SS = O->status("//root/Xx");
  EXPECT_EQ(SS.getError(), llvm::errc::no_such_file_or_directory);
  EXPECT_EQ(0, NumDiagnostics);
}

/// createInvocationFromCommandLine - Construct a compiler invocation object for
/// a command line argument vector.
///
/// \return A CompilerInvocation, or 0 if none was built for the given
/// argument vector.
std::unique_ptr<CompilerInvocation> clang::createInvocationFromCommandLine(
    ArrayRef<const char *> ArgList, IntrusiveRefCntPtr<DiagnosticsEngine> Diags,
    IntrusiveRefCntPtr<llvm::vfs::FileSystem> VFS) {
  if (!Diags.get()) {
    // No diagnostics engine was provided, so create our own diagnostics object
    // with the default options.
    Diags = CompilerInstance::createDiagnostics(new DiagnosticOptions);
  }

  SmallVector<const char *, 16> Args(ArgList.begin(), ArgList.end());

  // FIXME: Find a cleaner way to force the driver into restricted modes.
  Args.push_back("-fsyntax-only");

  // FIXME: We shouldn't have to pass in the path info.
  driver::Driver TheDriver(Args[0], llvm::sys::getDefaultTargetTriple(),
                           *Diags, VFS);

  // Don't check that inputs exist, they may have been remapped.
  TheDriver.setCheckInputsExist(false);

  std::unique_ptr<driver::Compilation> C(TheDriver.BuildCompilation(Args));
  if (!C)
    return nullptr;

  // Just print the cc1 options if -### was present.
  if (C->getArgs().hasArg(driver::options::OPT__HASH_HASH_HASH)) {
    C->getJobs().Print(llvm::errs(), "\n", true);
    return nullptr;
  }

  // We expect to get back exactly one command job, if we didn't something
  // failed. Offload compilation is an exception as it creates multiple jobs. If
  // that's the case, we proceed with the first job. If caller needs a
  // particular job, it should be controlled via options (e.g.
  // --cuda-{host|device}-only for CUDA) passed to the driver.
  const driver::JobList &Jobs = C->getJobs();
  bool OffloadCompilation = false;
  if (Jobs.size() > 1) {
    for (auto &A : C->getActions()){
      // On MacOSX real actions may end up being wrapped in BindArchAction
      if (isa<driver::BindArchAction>(A))
        A = *A->input_begin();
      if (isa<driver::OffloadAction>(A)) {
        OffloadCompilation = true;
        break;
      }
    }
  }
  if (Jobs.size() == 0 || !isa<driver::Command>(*Jobs.begin()) ||
      (Jobs.size() > 1 && !OffloadCompilation)) {
    SmallString<256> Msg;
    llvm::raw_svector_ostream OS(Msg);
    Jobs.Print(OS, "; ", true);
    Diags->Report(diag::err_fe_expected_compiler_job) << OS.str();
    return nullptr;
  }

  const driver::Command &Cmd = cast<driver::Command>(*Jobs.begin());
  if (StringRef(Cmd.getCreator().getName()) != "clang") {
    Diags->Report(diag::err_fe_expected_clang_command);
    return nullptr;
  }

  const ArgStringList &CCArgs = Cmd.getArguments();
  auto CI = llvm::make_unique<CompilerInvocation>();
  if (!CompilerInvocation::CreateFromArgs(*CI,
                                     const_cast<const char **>(CCArgs.data()),
                                     const_cast<const char **>(CCArgs.data()) +
                                     CCArgs.size(),
                                     *Diags))
    return nullptr;
  return CI;
}