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signal.c: get rid of deadlock by discarded signals

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* signal.c (rb_f_kill): get rid of deadlock as unhandled and
  discarded signals do not make interrupt_cond signaled.
  based on the patch by Kazuki Tsujimoto at [ruby-dev:48606].
  [Bug #9820]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47832 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2014-10-07 14:40:16 +00:00
parent 1bb2721e4b
commit 2ebafed88a
3 changed files with 14 additions and 1 deletions
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3
signal.c
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@ -487,7 +487,8 @@ rb_f_kill(int argc, const VALUE *argv)
default:
t = signal_ignored(sig);
if (t) {
if (t < 0) ruby_kill(pid, sig);
if (t < 0 && kill(pid, sig))
rb_sys_fail(0);
break;
}
signal_enque(sig);