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bug#38632: 27.0.50; Emacs process name is changed permanently upon creat
From: |
Robert Pluim |
Subject: |
bug#38632: 27.0.50; Emacs process name is changed permanently upon creating a named thread |
Date: |
Wed, 18 Dec 2019 18:04:53 +0100 |
>>>>> On Wed, 18 Dec 2019 17:53:49 +0200, Eli Zaretskii <eliz@gnu.org> said:
Eli> AFAIU, prctl is Linux-specific, whereas pthread_setname_np is
Eli> supported on other Posix platforms that provide pthreads. Also, prctl
Eli> has another disadvantage, in that it requires you to pass the name to
Eli> the thread being created, or put it in some global. OTOH, truncating
Eli> a string is not exactly rocket science, we can do that ourselves
Eli> before calling the API.
We already use a wrapper function to call the user-supplied function,
so prctl could be added there, but the wider availability of
pthread_setname_np weighs in its favour.
Eli> (Btw, the limitation is 16 bytes, including the terminating null, so
Eli> truncation needs to be clever about non-ASCII characters, and I wonder
Eli> what does prctl do when 15 bytes end in the middle of a multibyte
Eli> sequence.)
It does exactly what you'd expect, it drops the extraneous bytes, so
putting eg ü on the boundary results in a name ending in à (#xc3).
In any case, if emacs or prctl truncates, then the name as reported
by 'list-threads' will be out of sync with pthread_getname_np, unless
you'd want to adjust that too.
Robert
- bug#38632: 27.0.50; Emacs process name is changed permanently upon creating a named thread, Ihor Radchenko, 2019/12/16
- bug#38632: 27.0.50; Emacs process name is changed permanently upon creating a named thread, Eli Zaretskii, 2019/12/17
- bug#38632: 27.0.50; Emacs process name is changed permanently upon creating a named thread, Robert Pluim, 2019/12/18
- bug#38632: 27.0.50; Emacs process name is changed permanently upon creating a named thread, Eli Zaretskii, 2019/12/18
- bug#38632: 27.0.50; Emacs process name is changed permanently upon creating a named thread,
Robert Pluim <=
- bug#38632: 27.0.50; Emacs process name is changed permanently upon creating a named thread, Eli Zaretskii, 2019/12/18
- bug#38632: 27.0.50; Emacs process name is changed permanently upon creating a named thread, Robert Pluim, 2019/12/18
- bug#38632: 27.0.50; Emacs process name is changed permanently upon creating a named thread, Eli Zaretskii, 2019/12/19
- bug#38632: 27.0.50; Emacs process name is changed permanently upon creating a named thread, Robert Pluim, 2019/12/19
- bug#38632: 27.0.50; Emacs process name is changed permanently upon creating a named thread, Eli Zaretskii, 2019/12/19
- bug#38632: 27.0.50; Emacs process name is changed permanently upon creating a named thread, Eli Zaretskii, 2019/12/20