Date: Tue, 19 Nov 2013 09:00:01 GMT From: "Daniel M. Eischen" <eischen@vigrid.com> To: freebsd-threads@FreeBSD.org Subject: Re: threads/184073: wrong signal delivery to multithreaded processes in Perl Message-ID: <201311190900.rAJ901OB052457@freefall.freebsd.org>
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The following reply was made to PR threads/184073; it has been noted by GNATS.
From: "Daniel M. Eischen" <eischen@vigrid.com>
To: bug-followup@FreeBSD.org, Thomas.Eckardt@thockar.com
Cc:
Subject: Re: threads/184073: wrong signal delivery to multithreaded processes
in Perl
Date: Tue, 19 Nov 2013 03:40:34 -0500
There is no guarantee in POSIX that the main thread receives a
signal sent to the process if multiple threads (including the
main thread) have the signal unblocked. The only way to
guarantee signal delivery to a specific thread is to send it
directly to the desired thread, have all threads other than the
desired thread mask the signal, or be blocked in sigwait{info}()
from the desired thread at the time of signal delivery. You
are relying on behavior that is not specified by the standard.
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