GNU bug report logs - #38632
27.0.50; Emacs process name is changed permanently upon creating a named thread

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Package: emacs;

Reported by: Ihor Radchenko <yantar92 <at> gmail.com>

Date: Mon, 16 Dec 2019 06:45:02 UTC

Severity: normal

Merged with 39003

Found in versions 27.0.50, 27.0.60

Fixed in version 27.1

Done: Mattias Engdegård <mattiase <at> acm.org>

Bug is archived. No further changes may be made.

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Message #11 received at 38632 <at> debbugs.gnu.org (full text, mbox):

From: Robert Pluim <rpluim <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 38632 <at> debbugs.gnu.org, Ihor Radchenko <yantar92 <at> gmail.com>
Subject: Re: bug#38632: 27.0.50; Emacs process name is changed permanently
 upon creating a named thread
Date: Wed, 18 Dec 2019 10:05:58 +0100

>>>>> On Tue, 17 Dec 2019 22:05:52 +0200, Eli Zaretskii <eliz <at> gnu.org> said:

    >> From: Ihor Radchenko <yantar92 <at> gmail.com>
    >> Date: Mon, 16 Dec 2019 14:42:38 +0800
    >> 
    >> When I try to create a named thread like
    >> 
    >> (make-thread (lambda () (+ 1 2)) "test-emacs-async")
    >> 
    >> the emacs process gets renamed to "test-emacs-async" even after the
    >> thread returns. Making another thread with different name renames emacs
    >> process again.

    Eli> I think, instead of calling prctl in systhread.c, we should call
    Eli> pthread_set_name_np, and the configure-time test for prctl should be
    Eli> replaced with a test for pthread_set_name_np.

Would it not be easier to call prctl in the context of the created
thread? That way it deals with the name length issues for us:
pthread_setname_np fails if strlen(name) >= 16, wherease prctl
truncates.

Robert
This bug report was last modified 5 years and 138 days ago.

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