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List:       freebsd-current
Subject:    Signals and an exiting thread
From:       Justin Teller <justin.teller () gmail ! com>
Date:       2009-09-30 18:02:19
Message-ID: c47019cc0909301102y189a0b8aq47d23efae549f4ab () mail ! gmail ! com
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We're trying to control one process from another process through
signals (I know, revolutionary ;-), and we've found that a signal
occasionally gets lost.  The process we're signaling is
multi-threaded.  It looks like the signal is lost when the kernel
decides to post the signal to a thread that is in the process of dying
(calling pthread_exit, etc).

Is this expected behavior that we should just handle, or is it a race
in the kernel that should be/will be/already is fixed?

It may be that a fix is already in current, and I just haven't found
it in my searches through the source code (I'm working off of source
code for an older 8.0 image).  If it is fixed, I'd appreciate a
pointer to the code that fixes it.

Thanks in advance for the help
- Justin
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