dir.c: retry glob with GC

* dir.c (do_opendir): retry after GC when the limit for open file
  descriptors reached.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56467 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 14 insertions, 0 deletions

diff --git a/test/ruby/test_dir.rb b/test/ruby/test_dir.rb
index b188f4da60..ed0d084528 100644
--- a/test/ruby/test_dir.rb
+++ b/test/ruby/test_dir.rb
@@ -354,4 +354,18 @@ class TestDir < Test::Unit::TestCase
     assert_raise(Errno::ENOENT) {Dir.empty?(@nodir)}
     assert_not_send([Dir, :empty?, File.join(@root, "b")])
   end
+
+  def test_glob_gc_for_fd
+    assert_separately(["-C", @root], "#{<<-"begin;"}\n#{<<-"end;"}", timeout: 3)
+    begin;
+      Process.setrlimit(Process::RLIMIT_NOFILE, 50)
+      begin
+        tap {tap {tap {(0..100).map {open(IO::NULL)}}}}
+      rescue Errno::EMFILE
+      end
+      list = Dir.glob("*").sort
+      assert_not_empty(list)
+      assert_equal([*"a".."z"], list)
+    end;
+  end
 end