From: Takashi Yano <takashi.yano@nifty.ne.jp>
To: cygwin@cygwin.com
Cc: Alexey Izbyshev <izbyshev@ispras.ru>
Subject: Re: Deadlock of the process tree when running make
Date: Sat, 9 Apr 2022 20:46:19 +0900 [thread overview]
Message-ID: <20220409204619.dd0e53902d5e108ef462e510@nifty.ne.jp> (raw)
In-Reply-To: <ab3971adb8f441fd16bb62e480547a95@ispras.ru>
On Sat, 09 Apr 2022 14:02:38 +0300
Alexey Izbyshev wrote:
> On 2022-04-09 14:00, Alexey Izbyshev wrote:
> > On 2022-04-09 13:17, Takashi Yano wrote:
> >
> >> Attaching gdb to the hanging process and dumping stack by 'bt'
> >> command for each thread may diagnose more detail.
> >
> > I decided to simply look at assembly at the point shown in
> > ProcessHacker stack trace (cygwin1.dll!feinitialise+0x5ecab) to avoid
> > disturbing the process by gdb. And it's clear that the hang is in
> > fhandler_pty_slave::reset_switch_to_pcon() at [1]. I've checked that
> > there were some changes in that function since 3.3.4. Could they fix
> > this deadlock?
> >
> > [1]
> > https://cygwin.com/git/?p=newlib-cygwin.git;a=blob;f=winsup/cygwin/fhandler_tty.cc;h=7bef6958c106c5e78cc90e014081022fd3a205bc;hb=cygwin-3_3_4-release
> >
>
> Missed the line in the link above:
> https://cygwin.com/git?p=newlib-cygwin.git;a=blob;f=winsup/cygwin/fhandler_tty.cc;h=7bef6958c106c5e78cc90e014081022fd3a205bc;hb=cygwin-3_3_4-release#l1199
Thanks for finding that. It would be very helpfull if you could
find another process which holds pcon_mutex and where it is stopping.
--
Takashi Yano <takashi.yano@nifty.ne.jp>
next prev parent reply other threads:[~2022-04-09 11:47 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-07 21:53 Alexey Izbyshev
2022-04-07 23:54 ` Brian Inglis
2022-04-08 8:42 ` Alexey Izbyshev
2022-04-08 17:04 ` Brian Inglis
2022-04-11 13:27 ` Alexey Izbyshev
2022-04-09 10:17 ` Takashi Yano
2022-04-09 11:00 ` Alexey Izbyshev
2022-04-09 11:02 ` Alexey Izbyshev
2022-04-09 11:46 ` Takashi Yano [this message]
2022-04-09 16:07 ` Alexey Izbyshev
2022-04-09 16:57 ` Takashi Yano
2022-04-09 17:23 ` Alexey Izbyshev
2022-04-09 17:54 ` Takashi Yano
2022-04-09 19:35 ` Alexey Izbyshev
2022-04-09 20:26 ` Alexey Izbyshev
2022-04-10 7:34 ` Takashi Yano
2022-04-10 12:13 ` Alexey Izbyshev
2022-04-10 20:49 ` Alexey Izbyshev
2022-04-11 8:35 ` Takashi Yano
2022-04-11 10:10 ` Alexey Izbyshev
2022-04-13 16:48 ` Alexey Izbyshev
2022-04-13 17:22 ` Takashi Yano
2022-04-13 17:27 ` Alexey Izbyshev
2022-04-13 23:17 ` Alexey Izbyshev
2022-04-16 9:39 ` Takashi Yano
2022-04-16 13:21 ` Alexey Izbyshev
2022-04-27 11:22 ` Takashi Yano
2022-04-27 12:19 ` Alexey Izbyshev
2022-04-11 5:23 ` Jeremy Drake
2022-04-11 8:36 ` Takashi Yano
2022-04-11 15:28 ` Alexey Izbyshev
2022-04-11 17:02 ` Jeremy Drake
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