ruby-dev

2010年8月10日10:53 Yui NARUSE <redmine@ruby-lang.org>:
>
> 以下のプログラムが FreeBSD で終了しません。
> (test/ruby/test_rubyoptions.rb  の test_script_from_stdin より)
> Ubuntu 8.04 や Mac OS X 10.6 では終わることを確認しています。

単純化してみました。
パイプは関係ありません。

freebsd8(16:07:56)% cat z.rb
require 'pty'
PTY.getpty('sleep 1') do |r, w, pid|
  p pid
  w.print("a")
  Process.wait pid
end
puts :fin

freebsd8(16:07:58)% ./ruby -v z.rb
ruby 1.9.3dev (2010-08-07 trunk 28906) [i386-freebsd8.1]
32576
(ここでハング)

他の端末から ps してみると、以下のようになります。

freebsd8(16:07:25)% ps u32576
USER   PID %CPU %MEM   VSZ   RSS  TT  STAT STARTED      TIME COMMAND
akr  32576  0.0  0.1  1536   504   7- SEs+  4:07PM   0:00.00 sleep 1

STAT の意味は

   S       Marks a process that is sleeping for less than about 20
	   seconds.
   E       The process is trying to exit.
   s       The process is a session leader.
   +       The process is in the foreground process group of its
	   control terminal.

ということで、E のままで終わらないのがわかりません。

また、sleep 1 を ktrace sleep 1 にして kdump すると、

freebsd8(16:18:10)% kdump -E
...
 33428 sleep    0.001572 RET   sigprocmask 0
 33428 sleep    0.001611 CALL  nanosleep(0xbfbfeaac,0)
 33428 sleep    1.001607 RET   nanosleep 0
 33428 sleep    1.001672 CALL  sigprocmask(SIG_BLOCK,0x2807acc0,0xbfbfea10)
 33428 sleep    1.001681 RET   sigprocmask 0
 33428 sleep    1.001688 CALL  sigprocmask(SIG_SETMASK,0x2807acd0,0)
 33428 sleep    1.001693 RET   sigprocmask 0
 33428 sleep    1.001712 CALL  sigprocmask(SIG_BLOCK,0x2807acc0,0xbfbfe9d0)
 33428 sleep    1.001718 RET   sigprocmask 0
 33428 sleep    1.001723 CALL  sigprocmask(SIG_SETMASK,0x2807acd0,0)
 33428 sleep    1.001742 RET   sigprocmask 0
 33428 sleep    1.001757 CALL  exit(0)

というように nanosleep で 1秒待った後、exit(0) を呼んでいるようなのが
観察されます。
-- 
[田中 哲][たなか あきら][Tanaka Akira]

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In This Thread

[#41911] [Bug #3644] thread_win32.c / native_stop_timer_thread() がタイマースレッドの終了を待たずに帰ってきてしまう。 — 権兵衛名無し <redmine@...>

[#41933] *array で異常終了 — 小田利通 <oda@...>