Re: sysutils/strace wilderness on 6-CURRENT
From: Dan Nelson (dnelson_at_allantgroup.com)
Date: 08/31/04
- Previous message: Robin Schoonover: "Re: drm: ATI FireGL Mobility T2 patch"
- Maybe in reply to: Vladimir Grebenschikov: "sysutils/strace wilderness on 6-CURRENT"
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Date: Tue, 31 Aug 2004 12:23:55 -0500 To: Gary Jennejohn <garyj@www.jennejohn.org>
In the last episode (Aug 31), Gary Jennejohn said:
> Dan Nelson writes:
> > In the last episode (Aug 31), Vladimir Grebenschikov said:
> > > It silmple does nothing - sleeps foreaver in suspended:
> > >
> > > # strace /bin/ls
> >
> > This has happened on 5.x for ages. The quick fix is to ^Z, then
> > fg, or kill -CONT the hung strace process from another vty. I
> > don't know what strace does different from truss that makes it
> > hang. Nowadays, truss does almost as good a job as strace, so I
> > don't use it as often as I used to. The only thing I miss is
> > strace's ability to print the name of blocking syscalls (read or
> > sleep for example) as it waits.
> >
>
> I fixed a bug like this in strace for Linux. The SIGCHLD handler was
> being set too late and the child (through some wacky handling of
> SIGCHLD in the Linux kernel) got into a state where it never returned
> the expected status in wait(). Both the child and strace ended up
> hanging. kill -CONT also got things going there. Maybe FreeBSD has a
> similar problem?
Dunno. Strace is a port built from the sources at sourceforge, so I
assume that any Linux fixes would also be included. I see the port is
at 4.5.1 but sourceforge is up to 4.5.7. Maybe a newer version works
better?
-- Dan Nelson dnelson@allantgroup.com _______________________________________________ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org"
- Previous message: Robin Schoonover: "Re: drm: ATI FireGL Mobility T2 patch"
- Maybe in reply to: Vladimir Grebenschikov: "sysutils/strace wilderness on 6-CURRENT"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
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