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From: Paul Eggert <paul.eggert@verizon.net>
To: Glenn Morris <rgm@gnu.org>
Cc: 33709@debbugs.gnu.org
Subject: bug#33709: Hang when compiled with --coverage and gcc 7.3
Date: Thu, 27 Dec 2018 20:06:56 -0800	[thread overview]
Message-ID: <b6cdab6b-0794-7eeb-d37e-84d6a3e6afb4@verizon.net> (raw)
In-Reply-To: <mid0q799ex.fsf@fencepost.gnu.org>

I'm surprised that --coverage ever worked in a dumped emacs. I think libgcov 
uses the dynamic linker's malloc (so Emacs has *three* malloc implementations) 
and our trick for switching from the Emacs malloc in temacs to the system malloc 
in bootstrap-emacs won't work for memory allocated for --coverage. 
Unfortunately, the libgcov actions do not seem to be easy to disable in temacs 
and re-enable in bootstrap-emacs.

I suggest that we just say this combination isn't supported; if you want to 
build Emacs with gcc --coverage you can configure with CANNOT_DUMP=yes.

If the portable dumper ever gets working, --coverage should be easy to support, 
of course.





  parent reply	other threads:[~2018-12-28  4:06 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-12-11 18:59 bug#33709: Hang when compiled with --coverage and gcc 7.3 Glenn Morris
2018-12-11 19:27 ` Eli Zaretskii
2018-12-11 19:46   ` Glenn Morris
2018-12-11 20:37     ` Glenn Morris
2018-12-13 19:40       ` Glenn Morris
2018-12-13 19:54         ` Eli Zaretskii
2018-12-28  4:06 ` Paul Eggert [this message]
2020-08-31 10:36   ` Stefan Kangas
2022-01-29 15:18 ` Lars Ingebrigtsen
2022-01-29 19:18   ` Glenn Morris

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