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

[Jung-uk Kim]

On 21. 4. 6., Konstantin Belousov wrote:
> On Tue, Apr 06, 2021 at 09:46:59PM +0300, Konstantin Belousov wrote:
>> 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.
> 
> Also you might try this.  It should help if my guess is right.
> Only x86 handled ATM.

It seems the patch fixed the problem for me.  I'll try it on other
boxes, too.

Jung-uk Kim

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