Remove SIGCHLD `waidpid`. (#7527)

* Remove `waitpid_lock` and related code.

* Remove un-necessary test.

* Remove `rb_thread_sleep_interruptible` dead code.

1 files changed, 0 insertions, 43 deletions

diff --git a/test/ruby/test_signal.rb b/test/ruby/test_signal.rb
index c5043eea59..7877a35129 100644
--- a/test/ruby/test_signal.rb
+++ b/test/ruby/test_signal.rb
@@ -323,49 +323,6 @@ class TestSignal < Test::Unit::TestCase
     end;
   end
 
-  def test_sigchld_ignore
-    omit 'no SIGCHLD' unless Signal.list['CHLD']
-    old = trap(:CHLD, 'IGNORE')
-    cmd = [ EnvUtil.rubybin, '--disable=gems', '-e' ]
-    assert(system(*cmd, 'exit!(0)'), 'no ECHILD')
-    IO.pipe do |r, w|
-      pid = spawn(*cmd, "STDIN.read", in: r)
-      nb = Process.wait(pid, Process::WNOHANG)
-      th = Thread.new(Thread.current) do |parent|
-        Thread.pass until parent.stop? # wait for parent to Process.wait
-        w.close
-      end
-      assert_raise(Errno::ECHILD) { Process.wait(pid) }
-      th.join
-      assert_nil nb
-    end
-
-    IO.pipe do |r, w|
-      pids = 3.times.map { spawn(*cmd, 'exit!', out: w) }
-      w.close
-      zombies = pids.dup
-      assert_nil r.read(1), 'children dead'
-
-      Timeout.timeout(10) do
-        zombies.delete_if do |pid|
-          begin
-            Process.kill(0, pid)
-            false
-          rescue Errno::ESRCH
-            true
-          end
-        end while zombies[0]
-      end
-      assert_predicate zombies, :empty?, 'zombies leftover'
-
-      pids.each do |pid|
-        assert_raise(Errno::ECHILD) { Process.waitpid(pid) }
-      end
-    end
-  ensure
-    trap(:CHLD, old) if Signal.list['CHLD']
-  end
-
   def test_sigwait_fd_unused
     t = EnvUtil.apply_timeout_scale(0.1)
     assert_separately([], <<-End)