1 files changed, 74 insertions, 0 deletions
diff --git a/clang/unittests/Basic/VirtualFileSystemTest.cpp b/clang/unittests/Basic/VirtualFileSystemTest.cpp
index 580343d93..79b4d87 100644
--- a/clang/unittests/Basic/VirtualFileSystemTest.cpp
+++ b/clang/unittests/Basic/VirtualFileSystemTest.cpp
@@ -305,6 +305,22 @@ struct ScopedDir {
   }
   operator StringRef() { return Path.str(); }
 };
+
+struct ScopedLink {
+  SmallString<128> Path;
+  ScopedLink(const Twine &To, const Twine &From) {
+    Path = From.str();
+    std::error_code EC = sys::fs::create_link(To, From);
+    if (EC)
+      Path = "";
+    EXPECT_FALSE(EC);
+  }
+  ~ScopedLink() {
+    if (Path != "")
+      EXPECT_FALSE(llvm::sys::fs::remove(Path.str()));
+  }
+  operator StringRef() { return Path.str(); }
+};
 } // end anonymous namespace
 
 TEST(VirtualFileSystemTest, BasicRealFSIteration) {
@@ -334,6 +350,28 @@ TEST(VirtualFileSystemTest, BasicRealFSIteration) {
   EXPECT_EQ(vfs::directory_iterator(), I);
 }
 
+TEST(VirtualFileSystemTest, BrokenSymlinkRealFSIteration) {
+  ScopedDir TestDirectory("virtual-file-system-test", /*Unique*/ true);
+  IntrusiveRefCntPtr<vfs::FileSystem> FS = vfs::getRealFileSystem();
+
+  ScopedLink _a("no_such_file", TestDirectory + "/a");
+  ScopedDir _b(TestDirectory + "/b");
+  ScopedLink _c("no_such_file", TestDirectory + "/c");
+
+  std::error_code EC;
+  for (vfs::directory_iterator I = FS->dir_begin(Twine(TestDirectory), EC), E;
+       I != E; I.increment(EC)) {
+    // Skip broken symlinks.
+    if (EC == std::errc::no_such_file_or_directory) {
+      EC = std::error_code();
+      continue;
+    } else if (EC) {
+      break;
+    }
+    EXPECT_TRUE(I->getName() == _b);
+  }
+}
+
 TEST(VirtualFileSystemTest, BasicRealFSRecursiveIteration) {
   ScopedDir TestDirectory("virtual-file-system-test", /*Unique*/true);
   IntrusiveRefCntPtr<vfs::FileSystem> FS = vfs::getRealFileSystem();
@@ -373,6 +411,42 @@ TEST(VirtualFileSystemTest, BasicRealFSRecursiveIteration) {
   EXPECT_EQ(1, Counts[3]); // d
 }
 
+TEST(VirtualFileSystemTest, BrokenSymlinkRealFSRecursiveIteration) {
+  ScopedDir TestDirectory("virtual-file-system-test", /*Unique*/ true);
+  IntrusiveRefCntPtr<vfs::FileSystem> FS = vfs::getRealFileSystem();
+
+  ScopedLink _a("no_such_file", TestDirectory + "/a");
+  ScopedDir _b(TestDirectory + "/b");
+  ScopedLink _ba("no_such_file", TestDirectory + "/b/a");
+  ScopedDir _bb(TestDirectory + "/b/b");
+  ScopedLink _bc("no_such_file", TestDirectory + "/b/c");
+  ScopedLink _c("no_such_file", TestDirectory + "/c");
+  ScopedDir _d(TestDirectory + "/d");
+  ScopedDir _dd(TestDirectory + "/d/d");
+  ScopedDir _ddd(TestDirectory + "/d/d/d");
+  ScopedLink _e("no_such_file", TestDirectory + "/e");
+  std::vector<StringRef> Expected = {_b, _bb, _d, _dd, _ddd};
+
+  std::vector<std::string> Contents;
+  std::error_code EC;
+  for (vfs::recursive_directory_iterator I(*FS, Twine(TestDirectory), EC), E;
+       I != E; I.increment(EC)) {
+    // Skip broken symlinks.
+    if (EC == std::errc::no_such_file_or_directory) {
+      EC = std::error_code();
+      continue;
+    } else if (EC) {
+      break;
+    }
+    Contents.push_back(I->getName());
+  }
+
+  // Check sorted contents.
+  std::sort(Contents.begin(), Contents.end());
+  EXPECT_EQ(Expected.size(), Contents.size());
+  EXPECT_TRUE(std::equal(Contents.begin(), Contents.end(), Expected.begin()));
+}
+
 template <typename DirIter>
 static void checkContents(DirIter I, ArrayRef<StringRef> ExpectedOut) {
   std::error_code EC;