Re: Handles the masked signal when the thread exits

[Florian Weimer <fweimer@redhat.com>]

* Gibeom Gwon:

> On 11/19/21 03:08, Florian Weimer wrote:
>> * Gibeom Gwon:
>> 
>>> I am experiencing strange(unintended?) behavior when using pthread
>>> with signals. If I set the signal mask with pthread_sigmask() in the
>>> thread function and the process has pending signal when thread is
>>> exiting, signal handler executed in thread.
>>>
>>> It looks like glibc restores original signal mask at the end of the
>>> thread. So I suspect this eventually triggers masked signal
>>> handler. But I'm not sure it is intended or not.
>> Which glibc version are you using?

> Ah, I forgot to write the version. I'm using 2.33 and linux
> distribution is Arch Linux.

We had some issues with signals and thread exit in 2.34, but they are
exclusive to that release and cannot happen in 2.33.  I can't reproduce
the behavior you see with upstream 2.33, either.

What's your kernel version?  I've tried 5.14.13 and 5.14.17.

Thanks,
Florian