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Re: deadlock in waitchld()

From: Roman Rakus
Subject: Re: deadlock in waitchld()
Date: Wed, 12 Jun 2013 09:00:30 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130311 Thunderbird/17.0.4

On 05/24/13 16:00, Chet Ramey wrote:
On 5/24/13 9:30 AM, Roman Rakus wrote:
The race is in do-while loop in wait_for(). At the start of wait_for() we
are blocking SIGCHLD, however echo process ends during the loop and we
don't register it (don't handle SIGCHLD, which is sent).
Looking at the code, there is MUST_UNBLOCK_CHLD. May it make any harm to
enable it by default?
I spent a lot of time looking at this yesterday, and I have it pretty much
fixed.  The problem is in the trap handling code, not wait_for().  The trap
problem ends up corrupting the jobs data structure, which is why wait_for


Hi Chet,
Will be patch available somewhere? I checked devel branch on git. I would like to apply or backport a patch to older version.


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