[FileManager] Don't crash if reading from stdin and stat(".") fails
addAncestorsAsVirtualDirs("<stdin>") quickly returns without doing work
because "<stdin>" has no parent_path. This violates the expectation
that a subsequent call to getDirectoryFromFile("<stdin>") would succeed.
Instead, it fails because it uses the "." if the file has no path
component.
Fix this by keeping the behavior between addAncestorsAsVirtualDirs and
getDirectoryFromFile symmetric.
llvm-svn: 266089
diff --git a/clang/lib/Basic/FileManager.cpp b/clang/lib/Basic/FileManager.cpp
index ba016db..c4cc8dc 100644
--- a/clang/lib/Basic/FileManager.cpp
+++ b/clang/lib/Basic/FileManager.cpp
@@ -123,7 +123,7 @@
void FileManager::addAncestorsAsVirtualDirs(StringRef Path) {
StringRef DirName = llvm::sys::path::parent_path(Path);
if (DirName.empty())
- return;
+ DirName = ".";
auto &NamedDirEnt =
*SeenDirEntries.insert(std::make_pair(DirName, nullptr)).first;