Bug #671: TestSignal#test_exit_actionでEINTRのメッセージが出る

• Status: Closed
• Assignee: znz (Kazuhiro NISHIYAMA)
• Target version: -

[znz (Kazuhiro NISHIYAMA)]

=begin
TestSignal#test_exit_actionの子プロセス側で
Thread.start { Thread.pass }
のスレッドが何らかの理由で終了してしまうとselectシステムコールで待たずに
readシステムコールで待つようになってしまって、以下のようになります。

Thread.start { Thread.pass }
の後にsleep 0.01などを入れると確実に再現します。

% ruby-trunk test_signal.rb -v -n test_exit_action
Loaded suite .../trunk/test/ruby/test_signal
Started
TestSignal#test_exit_action: .../trunk/test/ruby/test_signal.rb:46:in sysread': Interrupted system call (Errno::EINTR) from .../trunk/test/ruby/test_signal.rb:46:in block in test_exit_action'
from .../trunk/test/ruby/test_signal.rb:40:in fork' from .../trunk/test/ruby/test_signal.rb:40:in test_exit_action'
from .../lib/ruby/1.9.0/minitest/unit.rb:431:in run' from .../lib/ruby/1.9.0/minitest/unit.rb:410:in block (2 levels) in run_test_suites'
from .../lib/ruby/1.9.0/minitest/unit.rb:404:in each' from .../lib/ruby/1.9.0/minitest/unit.rb:404:in block in run_test_suites'
from .../lib/ruby/1.9.0/minitest/unit.rb:403:in each' from .../lib/ruby/1.9.0/minitest/unit.rb:403:in run_test_suites'
from .../lib/ruby/1.9.0/minitest/unit.rb:383:in run' from .../lib/ruby/1.9.0/minitest/unit.rb:327:in block in autorun'
0.12 s: .

Finished in 0.119494 seconds.

1 tests, 0 assertions, 0 failures, 0 errors, 0 skips
%

以下のようにすれば確実にスレッドが残るようになると思うのですが、
どうでしょうか?

Index: test/ruby/test_signal.rb

--- test/ruby/test_signal.rb (revision 19868)
+++ test/ruby/test_signal.rb (working copy)
@@ -41,7 +41,7 @@ class TestSignal < Test::Unit::TestCase
Signal.trap(:USR1, "EXIT")
w0.close
w.syswrite("a")

•    Thread.start { Thread.pass }
  

•    Thread.start { sleep(2) }
     r0.sysread(4096)
   }
   r.sysread(1)
  

=end

• Status changed from Open to Closed
• % Done changed from 0 to 100

=begin
Applied in changeset r19902.
=end