From: "Jan Djärv" <jan.h.d@swipnet.se>
To: Paul Eggert <eggert@cs.ucla.edu>
Cc: 9196@debbugs.gnu.org
Subject: bug#9196: integer and memory overflow issues (e.g., cut-and-paste crashes Emacs)
Date: Sun, 31 Jul 2011 10:57:20 +0200 [thread overview]
Message-ID: <4E3518F0.4040002@swipnet.se> (raw)
In-Reply-To: <4E345892.8010200@cs.ucla.edu>
Paul Eggert skrev 2011-07-30 21:16:
> I take your point that the checks add clutter, so I'll
> revise the patch to address that problem, by adding a
> couple of memory allocators that do the proper overflow
> checking internally, so that callers don't need to
> test for integer overflow.
>
> This will take a bit of time to prepare and test, so
> please bear with me, but to give you a feel here's a draft
> of the revised patch to xgselect.c. This simplifies
> xgselect.c compared to what's in the trunk now.
>
That is a good approach, very nice.
> --- src/xgselect.c 2011-07-01 09:18:46 +0000
> +++ src/xgselect.c 2011-07-30 18:19:51 +0000
> @@ -54,10 +54,8 @@
> do {
> if (n_gfds> gfds_size)
> {
> - while (n_gfds> gfds_size)
> - gfds_size *= 2;
> xfree (gfds);
> - gfds = xmalloc (sizeof (*gfds) * gfds_size);
> + gfds = xpmalloc (&gfds_size, n_gfds - gfds_size, INT_MAX, sizeof *gfds);
> }
>
> n_gfds = g_main_context_query (context,
>
Jan D.
next prev parent reply other threads:[~2011-07-31 8:57 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-29 6:44 bug#9196: integer and memory overflow issues (e.g., cut-and-paste crashes Emacs) Paul Eggert
2011-07-29 10:01 ` Jan Djärv
2011-07-29 16:21 ` Paul Eggert
2011-07-29 16:49 ` Jan Djärv
2011-07-29 21:03 ` Paul Eggert
2011-07-30 5:52 ` Jan Djärv
2011-07-30 19:16 ` Paul Eggert
2011-07-31 8:57 ` Jan Djärv [this message]
2011-08-05 2:33 ` Paul Eggert
2011-08-05 9:26 ` Jan Djärv
2011-08-06 1:24 ` Paul Eggert
2011-08-08 18:01 ` Jan Djärv
[not found] ` <handler.9196.B.131192196724343.ack@debbugs.gnu.org>
2011-08-26 16:38 ` Paul Eggert
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