From: Florian Ebeling <florian.ebeling@gmail.com>
To: Eli Zaretskii <eliz@gnu.org>
Cc: 11541@debbugs.gnu.org, cyd@gnu.org
Subject: bug#11541: 24.0.97; Crash when visiting file on OS X 10.7.3
Date: Thu, 31 May 2012 23:55:40 +0200 [thread overview]
Message-ID: <CAGOk8R_eYGdar09ceK698h1dhq=WeHM6F=MGjUdq6nEbuF+17g@mail.gmail.com> (raw)
In-Reply-To: <83aa0o157c.fsf@gnu.org>
> The code involved in this hardly ever touches Emacs internals. It's
> simple ObjC code, at least to my naive eyes.
I stepped through the whole thing, but I didn't notice anything, not
that that would mean too much.
> As the first goal, I suggest to try figuring out what happens with the
> font_spec argument to ns_findfonts -- is it corrupted right at entry
> to the function, or does it get corrupted later? You should display
> it, using the same commands you used for scratch_font_spec in its
> caller, right at the entry to the function. Assuming the value at
> entry is OK (which would be my guess), then step through the code of
> ns_findfonts, and see which line causes its corruption.
The corruption of font_spec doesn't occur now, but the crash still occurs.
Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_INVALID_ADDRESS at address: 0x0000000000000000
0x00007fff8966d3c2 in CFStringGetLength ()
(gdb) f 18
#18 0x00000001001a1253 in ns_findfonts (font_spec=4338015181,
isMatch=0 '\000') at nsfont.m:532
532 matchingDescs = [fdesc matchingFontDescriptorsWithMandatoryKeys: fkeys];
...
(gdb) pp font_spec
#<font-spec ns apple nil nil iso10646-1 nil nil nil nil nil nil nil
((:script . symbol))>
(gdb) p font_spec
$45 = 4338015181
(gdb) xtype
Lisp_Vectorlike
PVEC_FONT
So right after the crash the font_spec still looks like a legit lisp
object. Don't ask me why that was different before. The values here
and in other mails were copy-pasted, so that did happen.
--
Florian Ebeling
florian.ebeling@gmail.com
next prev parent reply other threads:[~2012-05-31 21:55 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-22 10:29 bug#11541: 24.0.97; Crash when visiting file on OS X 10.7.3 Florian Ebeling
2012-05-24 22:08 ` bug#11541: Florian Ebeling
2012-05-26 8:33 ` bug#11541: 24.0.97; Crash when visiting file on OS X 10.7.3 Jan Djärv
2012-05-26 20:12 ` Florian Ebeling
2012-05-29 14:06 ` Chong Yidong
2012-05-29 19:48 ` Florian Ebeling
2012-05-30 3:22 ` Chong Yidong
2012-05-30 7:55 ` Florian Ebeling
2012-05-30 10:31 ` Chong Yidong
2012-05-30 10:53 ` C. Florian Ebeling
2012-05-30 13:36 ` Chong Yidong
2012-05-30 14:39 ` Florian Ebeling
2012-05-31 6:52 ` Chong Yidong
2012-05-31 7:12 ` Florian Ebeling
2012-05-31 9:31 ` Chong Yidong
2012-05-31 10:19 ` Florian Ebeling
2012-05-31 15:48 ` Eli Zaretskii
2012-05-31 17:27 ` C. Florian Ebeling
2012-05-31 17:54 ` Eli Zaretskii
2012-05-31 19:15 ` Alp Aker
2012-05-31 19:48 ` Eli Zaretskii
2012-05-31 19:50 ` C. Florian Ebeling
2012-05-31 20:11 ` Eli Zaretskii
2012-05-31 21:55 ` Florian Ebeling [this message]
2012-06-01 3:50 ` YAMAMOTO Mitsuharu
2012-06-01 5:43 ` Florian Ebeling
2012-06-01 6:14 ` Eli Zaretskii
2012-06-01 6:36 ` Florian Ebeling
2012-06-01 6:41 ` Chong Yidong
2012-06-01 6:44 ` Florian Ebeling
2012-06-01 8:53 ` Eli Zaretskii
2012-06-01 11:57 ` Jan D.
2012-06-01 13:42 ` Chong Yidong
2012-06-01 6:17 ` Eli Zaretskii
2012-06-01 6:46 ` Florian Ebeling
2012-06-01 8:47 ` Eli Zaretskii
2012-06-01 8:55 ` Florian Ebeling
2012-06-01 9:21 ` Eli Zaretskii
2012-06-01 14:51 ` Florian Ebeling
2012-06-01 16:12 ` Jan Djärv
[not found] ` <mailman.2085.1338562350.855.bug-gnu-emacs@gnu.org>
2012-06-18 23:06 ` jamezilla
2012-06-20 19:56 ` Florian Ebeling
[not found] ` <mailman.3138.1340222261.855.bug-gnu-emacs@gnu.org>
2012-06-22 5:29 ` jamezilla
2012-06-01 8:52 ` Florian Ebeling
2012-06-01 8:56 ` Eli Zaretskii
2012-09-26 20:30 ` bug#11541: - Another reproduction - Emacs 24.2; Null pointer on OSX with cocoa UI mrevilgnome
2012-09-26 20:41 ` mrevilgnome
2012-10-14 18:58 ` bug#11541: 24.0.97; Crash when visiting file on OS X 10.7.3 Jan Djärv
2012-10-15 21:15 ` C. Florian Ebeling
2012-10-16 5:05 ` Jan Djärv
2012-11-01 9:49 ` Thomas Kappler
2012-11-06 11:01 ` bug#11541: Possible fix Thomas Kappler
2012-11-08 19:53 ` Jan Djärv
2012-11-09 10:27 ` bug#11541: THanks! Thomas Kappler
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