Add a hook before fork() for getaddrinfo_a()

We need stop worker threads in getaddrinfo_a() before fork().
This change adds a hook before fork() that cancel all outstanding requests
and wait for all ongoing requests. Then, it waits for all worker
threads to be finished.

Fixes [Bug #17220]

1 files changed, 10 insertions, 0 deletions

diff --git a/test/socket/test_socket.rb b/test/socket/test_socket.rb
index f1ec927c4c..04d677c747 100644
--- a/test/socket/test_socket.rb
+++ b/test/socket/test_socket.rb
@@ -102,6 +102,16 @@ class TestSocket < Test::Unit::TestCase
     assert_nothing_raised('[ruby-core:29427]'){ TCPServer.open('localhost', 0) {} }
   end
 
+  def test_getaddrinfo_after_fork
+    skip "fork not supported" unless Process.respond_to?(:fork)
+    assert_normal_exit(<<-"end;", '[ruby-core:100329] [Bug #17220]')
+      require "socket"
+      Socket.getaddrinfo("localhost", nil)
+      pid = fork { Socket.getaddrinfo("localhost", nil) }
+      assert_equal pid, Timeout.timeout(30) { Process.wait(pid) }
+    end;
+  end
+
 
   def test_getnameinfo
     assert_raise(SocketError) { Socket.getnameinfo(["AF_UNIX", 80, "0.0.0.0"]) }