[PATCH] D44960: Prevent llvm-cov from hanging when a symblink doesn't exist.

[Yuke Liao via Phabricator via llvm-commits]

liaoyuke updated this revision to Diff 140100.
liaoyuke added a comment.

When recursive directory iterator encounters an error, it either hangs
or exits immediately in previous implementations.

This change modifies the behavior to report the error and continue
its walk, and added corresponding unit tests to verify it.


Repository:
  rL LLVM

https://reviews.llvm.org/D44960

Files:
  include/llvm/Support/FileSystem.h
  tools/llvm-cov/CodeCoverage.cpp
  unittests/Support/Path.cpp

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