From: Eli Zaretskii <eliz@gnu.org>
To: Barry OReilly <gundaetiapo@gmail.com>
Cc: stephen.berman@gmx.net, 15405@debbugs.gnu.org, sdl.web@gmail.com
Subject: bug#15405: 24.3; #[] freezes emacs
Date: Wed, 18 Sep 2013 22:26:47 +0300 [thread overview]
Message-ID: <83txhilymg.fsf@gnu.org> (raw)
In-Reply-To: <CAFM41H3pRPVcONHaW8tf=RPwREHEZgx-0ROSz5HzpBjXugkTdA@mail.gmail.com>
> Date: Wed, 18 Sep 2013 13:31:56 -0400
> From: Barry OReilly <gundaetiapo@gmail.com>
>
> FWIW, only one M-: #[] is necessary in the reproduction recipe.
>
> I used:
>
> diff --git a/src/font.c b/src/font.c
> index 68db9f2..0f2d24f 100644
> --- a/src/font.c
> +++ b/src/font.c
> @@ -2619,6 +2619,12 @@ font_delete_unmatched (Lisp_Object vec, Lisp_Object
> spec, int size)
> enum font_property_index prop;
> int i;
>
> + bool noninteractive_old = noninteractive;
> + { struct timespec debug_ts; char debug_dateStr[20]; {
> clock_gettime(CLOCK_REALTIME, &debug_ts); struct tm mytm;
> localtime_r(&debug_ts.tv_sec, &mytm); strftime(debug_dateStr, 20,
> "%Y-%m-%dT%H:%M:%S", &mytm); }
> + printf( "%s.%09ld|pid:%d|tid:%ld|%s|%d| DEBUG: vec size=%ld\n", //
> TODO: debugging
> + debug_dateStr, debug_ts.tv_nsec, getpid(),
> pthread_self(), __FILE__, __LINE__, ASIZE(vec) ); fflush(stdout); }
> + Fprin1(vec, Qnil);
> + noninteractive = noninteractive_old;
> for (val = Qnil, i = ASIZE (vec) - 1; i >= 0; i--)
> {
> entity = AREF (vec, i);
>
> Got:
> 2013-09-18T13:15:22.845944000|pid:15278|tid:2868504832|font.c|2625| DEBUG:
> vec size=4
> 2013-09-18T13:15:22.847422000|pid:15278|tid:2868504832|font.c|2625| DEBUG:
> vec size=4611686018628714496
> Fatal error 11: Segmentation fault
>
> Clearly the value of i was a 32 bit truncation of that larger value.
The next step is to put a hardware watchpoint on that vector, and see
who thrashes it.
next prev parent reply other threads:[~2013-09-18 19:26 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-18 1:50 bug#15405: 24.3; #[] freezes emacs Leo Liu
2013-09-18 7:23 ` Andreas Schwab
2013-09-18 14:36 ` Barry OReilly
2013-09-18 15:07 ` Eli Zaretskii
2013-09-18 15:14 ` Barry OReilly
2013-09-18 15:27 ` Eli Zaretskii
2013-09-18 15:41 ` Stephen Berman
2013-09-18 16:26 ` Eli Zaretskii
2013-09-18 17:31 ` Barry OReilly
2013-09-18 19:26 ` Eli Zaretskii [this message]
2013-09-18 23:20 ` Barry OReilly
2013-09-19 7:00 ` Eli Zaretskii
2013-09-20 15:33 ` Barry OReilly
2013-09-20 16:13 ` Barry OReilly
2013-09-20 16:21 ` Drew Adams
2013-09-20 19:09 ` Stefan Monnier
2013-09-20 19:43 ` Barry OReilly
2013-09-20 21:26 ` Stefan Monnier
2013-09-20 21:38 ` Barry OReilly
2013-09-21 1:28 ` Dmitry Antipov
2013-09-21 1:39 ` Dmitry Antipov
2013-09-21 2:51 ` Stefan Monnier
2013-09-25 15:22 ` Barry OReilly
2013-09-25 16:12 ` Dmitry Antipov
2013-09-25 17:35 ` Stefan Monnier
2013-09-25 19:09 ` Barry OReilly
2013-09-25 21:50 ` Dmitry Antipov
2013-09-26 1:15 ` Stefan Monnier
2013-09-26 3:51 ` Barry OReilly
2013-09-25 17:10 ` Stefan Monnier
2013-09-18 23:41 ` Barry OReilly
2013-09-18 17:57 ` Stephen Berman
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