Date: Thu, 05 Sep 2002 21:55:56 +0100 (BST) From: Duncan Barclay <dmlb@dmlb.org> To: Marcel Moolenaar <marcel@xcllnt.net> Cc: emulation@FreeBSD.org Subject: fix for Linux matlab exit behaviour - problem with linux_clone(2 Message-ID: <XFMail.20020905215556.dmlb@computer.my.domain> In-Reply-To: <XFMail.20020905194033.dmlb@computer.my.domain>
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Please review the following PR for a hack to let matlab exit.
http://www.freebsd.org/cgi/query-pr.cgi?pr=42457
The code in PR is deliberatly not a patch because it is not the right way
to cleanly fix the problem.
The problem is that we do not fully emulate all of linux_clone(2) behaviour,
in particular, linux_clone(2) allows a thread to not send a signal to
its parent on exit. /sys/kern_exit.c does not allow this and will
send a specified signal or SIGCHLD. Matlab has a SIGCHLD handler that
does not reap threads. If the SIGCHLD is not sent, matlab reaps its last
thread and exits cleanly.
This has been tested on 4.6-PRE, with Matlab Release 12.1.
Duncan
--
________________________________________________________________________
Duncan Barclay | God smiles upon the little children,
dmlb@dmlb.org | the alcoholics, and the permanently stoned.
dmlb@freebsd.org| Steven King
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