GNU bug report logs - #55870
GNU Emacs 26.3, Select All(C-x h) does not work

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From: Po Lu <luangruo <at> yahoo.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 55870 <at> debbugs.gnu.org, larsi <at> gnus.org, brucelam1982pi <at> anche.no
Subject: bug#55870: GNU Emacs 26.3, Select All(C-x h) does not work
Date: Sun, 17 Jul 2022 16:41:21 +0800

Eli Zaretskii <eliz <at> gnu.org> writes:

>> None in particular: we store the clipboard data locally, and other
>> programs request different selection "targets" from Emacs depending on
>> the coding system they want it in.
>
> So the memory growth in the OP's scenario is due to something we do
> locally?  Where's the code which "stores the clipboard data locally"?

xselect.c.  Look at the code which changes terminal->Vselection_alist in
x_own_selection.

> Or maybe some external program does request the clipboard data on OP's
> machine?  Is there a way to know when that happens, and specifically
> to know which data-type is being requested?

The best way is to build xselect.c with TRACE_SELECTION defined to 1 in
that file.  Otherwise, tracing each of the functions in
selection-converter-alist should work too, but will not catch requests
for types Emacs does not know how to handle.

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