Date: Sun, 17 Dec 2017 07:33:35 -0600 From: Lucas Young <youngluc@gmail.com> To: Hans Petter Selasky <hps@selasky.org> Cc: freebsd-multimedia@freebsd.org Subject: Re: webcamd-4.12.0.1 segfault when using WinTV-HV-950Q Message-ID: <CAP0m9o3zYO3D6qxmnx9QWaTE=Zh1HuNwfjDO4e3UV%2BfSGkw52g@mail.gmail.com> In-Reply-To: <e5f10be7-c6a1-15e9-658e-5a5c3ee9bb84@selasky.org> References: <63966a1d-1244-4ea0-0bf8-15b485f63cd4@gmail.com> <a78060a6-38f5-09d4-9139-75e732b2cbd1@selasky.org> <d35dba0c-5953-a856-3d6f-0010ce05cb27@gmail.com> <e5f10be7-c6a1-15e9-658e-5a5c3ee9bb84@selasky.org>
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On Sun, Dec 17, 2017 at 3:40 AM, Hans Petter Selasky <hps@selasky.org> wrote:
> On 12/17/17 04:03, Lucas Young wrote:
>>
>> #0 0x0000000000415262 in timer_exec (arg=0x0) at kernel/linux_timer.c:142
>> 142 TAILQ_REMOVE(&timer_head, t,
>> entry);
>> (gdb) bt
>> #0 0x0000000000415262 in timer_exec (arg=0x0) at kernel/linux_timer.c:142
>> #1 0x00000008014cfbc5 in pthread_create () from /lib/libthr.so.3
>> #2 0x0000000000000000 in ?? ()
>> Current language: auto; currently minimal
>> (gdb) p &timer_head
>> $1 = (struct timer_head *) 0xc32bf8
>> (gdb) p t
>> $2 = (struct timer_list *) 0x802843130
>
>
> Instead of dumping &timer_head, can you dump "timer_head" and the tree of
> elements that follow?
>
> p timer_head
>
> p *t
>
> --HPS
I sure can. Here is the output:
#0 0x0000000000415262 in timer_exec (arg=0x0) at kernel/linux_timer.c:142
142 TAILQ_REMOVE(&timer_head, t, entry);
(gdb) set print pretty on
Current language: auto; currently minimal
(gdb) bt
#0 0x0000000000415262 in timer_exec (arg=0x0) at kernel/linux_timer.c:142
#1 0x00000008014cfbc5 in pthread_create () from /lib/libthr.so.3
#2 0x0000000000000000 in ?? ()
(gdb) p &timer_head
$1 = (struct timer_head *) 0xc32bf8
(gdb) p timer_head
$2 = {
tqh_first = 0x802843078,
tqh_last = 0x802843130
}
(gdb) p t
$3 = (struct timer_list *) 0x802843130
(gdb) p *t
$4 = {
entry = {
tqe_next = 0x802843130,
tqe_prev = 0x0
},
function = 0x413260 <delayed_work_timer_fn>,
expires = 4494,
data = 34401956120
}
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