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bug#11541: 24.0.97; Crash when visiting file on OS X 10.7.3
From: |
Florian Ebeling |
Subject: |
bug#11541: 24.0.97; Crash when visiting file on OS X 10.7.3 |
Date: |
Wed, 30 May 2012 16:39:21 +0200 |
On Wed, May 30, 2012 at 3:36 PM, Chong Yidong <cyd@gnu.org> wrote:
> Interesting. We need to pin down where the stack clobbering is taking
> place; I don't see an obvious problem in the code, so let's just do it
> by brute force. Could you apply the following patch (which adds three
> abort conditions to the code), trigger the bug again, then see where the
> abort takes place?
It still stops at the same location, which is 531 after the patch.
Here is the debugger session output:
#16 0x00007fff89e8a587 in TDescriptor::CreateMatchingDescriptors ()
#17 0x0000000100a32599 in -[NSCTFontDescriptor
matchingFontDescriptorsWithMandatoryKeys:] ()
#18 0x00000001001a1c70 in ns_findfonts (font_spec=140734799760960,
isMatch=0 '\0') at nsfont.m:531
(More stack frames follow...)
(gdb) f 18
#18 0x00000001001a1c70 in ns_findfonts (font_spec=140734799760960,
isMatch=0 '\000') at nsfont.m:531
531 matchingDescs = [fdesc matchingFontDescriptorsWithMandatoryKeys:
fkeys];
Current language: auto; currently objective-c
(gdb) li ns_findfonts
492 /* Implementation for list() and match(). List() can return nil,
match()
493 must return something. Strategy is to drop family name from attribute
494 matching set for match. */
495 static Lisp_Object
496 ns_findfonts (Lisp_Object font_spec, BOOL isMatch)
497 {
498 Lisp_Object tem, list = Qnil;
499 NSFontDescriptor *fdesc, *desc;
500 NSMutableSet *fkeys;
501 NSArray *matchingDescs;
(gdb)
502 NSEnumerator *dEnum;
503 NSString *family;
504 NSSet *cFamilies;
505 BOOL foundItal = NO;
506
507 if (NSFONT_TRACE)
508 {
509 fprintf (stderr, "nsfont: %s for fontspec:\n ",
510 (isMatch ? "match" : "list"));
511 debug_print (font_spec);
(gdb)
512 }
513
514 if (!FONT_SPEC_P (font_spec))
515 abort ();
516
517 cFamilies = ns_get_covering_families (ns_get_req_script
(font_spec), 0.90);
518
519 if (!FONT_SPEC_P (font_spec))
520 abort ();
521
(gdb)
522 fdesc = ns_spec_to_descriptor (font_spec);
523
524 if (!FONT_SPEC_P (font_spec))
525 abort ();
526
527 fkeys = [NSMutableSet setWithArray: [[fdesc fontAttributes]
allKeys]];
528 if (isMatch)
529 [fkeys removeObject: NSFontFamilyAttribute];
530
531 matchingDescs = [fdesc matchingFontDescriptorsWithMandatoryKeys:
fkeys];
(gdb) p font_spec
$1 = 140734799760960
(gdb) xtype
Lisp_Int0
- bug#11541:, (continued)
- bug#11541:, Florian Ebeling, 2012/05/24
- bug#11541: 24.0.97; Crash when visiting file on OS X 10.7.3, Jan Djärv, 2012/05/26
- bug#11541: 24.0.97; Crash when visiting file on OS X 10.7.3, Chong Yidong, 2012/05/29
- bug#11541: 24.0.97; Crash when visiting file on OS X 10.7.3, Florian Ebeling, 2012/05/29
- bug#11541: 24.0.97; Crash when visiting file on OS X 10.7.3, Chong Yidong, 2012/05/29
- bug#11541: 24.0.97; Crash when visiting file on OS X 10.7.3, Florian Ebeling, 2012/05/30
- bug#11541: 24.0.97; Crash when visiting file on OS X 10.7.3, Chong Yidong, 2012/05/30
- bug#11541: 24.0.97; Crash when visiting file on OS X 10.7.3, C. Florian Ebeling, 2012/05/30
- bug#11541: 24.0.97; Crash when visiting file on OS X 10.7.3, Chong Yidong, 2012/05/30
- bug#11541: 24.0.97; Crash when visiting file on OS X 10.7.3,
Florian Ebeling <=
- bug#11541: 24.0.97; Crash when visiting file on OS X 10.7.3, Chong Yidong, 2012/05/31
- bug#11541: 24.0.97; Crash when visiting file on OS X 10.7.3, Florian Ebeling, 2012/05/31
- bug#11541: 24.0.97; Crash when visiting file on OS X 10.7.3, Chong Yidong, 2012/05/31
- bug#11541: 24.0.97; Crash when visiting file on OS X 10.7.3, Florian Ebeling, 2012/05/31
- bug#11541: 24.0.97; Crash when visiting file on OS X 10.7.3, Eli Zaretskii, 2012/05/31
- bug#11541: 24.0.97; Crash when visiting file on OS X 10.7.3, C. Florian Ebeling, 2012/05/31
- bug#11541: 24.0.97; Crash when visiting file on OS X 10.7.3, Eli Zaretskii, 2012/05/31
- bug#11541: 24.0.97; Crash when visiting file on OS X 10.7.3, Alp Aker, 2012/05/31
- bug#11541: 24.0.97; Crash when visiting file on OS X 10.7.3, Eli Zaretskii, 2012/05/31
- bug#11541: 24.0.97; Crash when visiting file on OS X 10.7.3, C. Florian Ebeling, 2012/05/31