From: "kosaki (Motohiro KOSAKI)" <kosaki.motohiro@...>
Date: 2012-11-06T04:40:38+09:00
Subject: [ruby-core:48951] [ruby-trunk - Bug #7134] Signal handling bug in Mac OS X


Issue #7134 has been updated by kosaki (Motohiro KOSAKI).

File mutex_notrap.patch added

Attached my fixing proposal. This patch masks trap handler invocation during IO lock held.
But, I guess ko1 might dislike this approach because it slow down CHECK_INTS performance....

----------------------------------------
Bug #7134: Signal handling bug in Mac OS X
https://bugs.ruby-lang.org/issues/7134#change-32455

Author: auastro (Andy Kitchen)
Status: Assigned
Priority: Normal
Assignee: nobu (Nobuyoshi Nakada)
Category: 
Target version: 2.0.0
ruby -v: ruby 1.9.3p194 (2012-04-20 revision 35410) [x86_64-darwin12]


On Mac OS X, running the attached program causes the exception below about 1/10 times it is run.

$ ruby hup.rb 
hup.rb:2:in `write': deadlock; recursive locking (ThreadError)
	from hup.rb:2:in `puts'
	from hup.rb:2:in `puts'
	from hup.rb:2:in `block in <main>'
	from hup.rb:6:in `call'
	from hup.rb:6:in `write'
	from hup.rb:6:in `puts'
	from hup.rb:6:in `puts'
	from hup.rb:6:in `<main>'

The expected output is:
> In Hup Handler
>Finished...

or

> Finished...
> In Hup Handler

My ruby is compiled with clang:

$ clang --version
Apple clang version 4.1 (tags/Apple/clang-421.11.65) (based on LLVM 3.1svn)
Target: x86_64-apple-darwin12.2.0
Thread model: posix



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