git: d36d68161517 - main - rtld dl_iterate_phdr(): dlpi_tls_data is wrong

[Konstantin Belousov]

On Tue, Apr 06, 2021 at 02:35:59PM -0400, Jung-uk Kim wrote:
> On 21. 4. 5., Konstantin Belousov wrote:
> > The branch main has been updated by kib:
> > 
> > URL: https://cgit.FreeBSD.org/src/commit/?id=d36d6816151705907393889d661cbfd25c630ca8
> > 
> > commit d36d6816151705907393889d661cbfd25c630ca8
> > Author:     Konstantin Belousov <kib at FreeBSD.org>
> > AuthorDate: 2021-04-05 03:05:44 +0000
> > Commit:     Konstantin Belousov <kib at FreeBSD.org>
> > CommitDate: 2021-04-06 00:23:08 +0000
> > 
> >     rtld dl_iterate_phdr(): dlpi_tls_data is wrong
> >     
> >     dl_iterate_phdr() dlpi_tls_data should provide the TLS module segment
> >     address, and not the TLS init segment address as it does now.
> >     
> >     Reported by:    emacsray at gmail.com
> >     PR:     254774
> >     Sponsored by:   The FreeBSD Foundation
> >     MFC after:      1 week
> 
> I started having strange hangs in various applications from yesterday,
> e.g., Xorg, Thunderbird, etc.  Today, I updated ports tree from Git for
> the first time and started updating packages.  Then, I experienced
> similar problems, e.g., building editors/kate, multimedia/vlc, etc.,
> were hanging.  I noticed some tools were stuck in urwlck state and I
> found reverting this commit fixed the problem for me.
> 
> Please take a look.

Can you get backtrace for all threads in hanging process?
I do not need debugging symbols for the apps, libc/libthr/rtld with debug
info, installed by default from the base, should be enough.