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* [Bug libobjc/51891] New: class_copyIvarList crashes on empty ivars
@ 2012-01-18 10:07 tilo at pruetz dot net
2012-01-19 1:36 ` [Bug libobjc/51891] " pinskia at gcc dot gnu.org
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: tilo at pruetz dot net @ 2012-01-18 10:07 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51891
Bug #: 51891
Summary: class_copyIvarList crashes on empty ivars
Classification: Unclassified
Product: gcc
Version: 4.6.2
Status: UNCONFIRMED
Severity: blocker
Priority: P3
Component: libobjc
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: tilo@pruetz.net
Created attachment 26361
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26361
simple example
When calling class_copyIvarList(class, NULL) with a class that has no ivars the
app crashes with a segfault.
Please find an example attached.
^ permalink raw reply [flat|nested] 7+ messages in thread* [Bug libobjc/51891] class_copyIvarList crashes on empty ivars 2012-01-18 10:07 [Bug libobjc/51891] New: class_copyIvarList crashes on empty ivars tilo at pruetz dot net @ 2012-01-19 1:36 ` pinskia at gcc dot gnu.org 2012-09-16 15:21 ` dpapavas at gmail dot com ` (4 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: pinskia at gcc dot gnu.org @ 2012-01-19 1:36 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51891 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Severity|blocker |normal ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug libobjc/51891] class_copyIvarList crashes on empty ivars 2012-01-18 10:07 [Bug libobjc/51891] New: class_copyIvarList crashes on empty ivars tilo at pruetz dot net 2012-01-19 1:36 ` [Bug libobjc/51891] " pinskia at gcc dot gnu.org @ 2012-09-16 15:21 ` dpapavas at gmail dot com 2014-12-08 21:31 ` larry.campbell at gmail dot com ` (3 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: dpapavas at gmail dot com @ 2012-09-16 15:21 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51891 Dimitris Papavasiliou <dpapavas at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |dpapavas at gmail dot com --- Comment #1 from Dimitris Papavasiliou <dpapavas at gmail dot com> 2012-09-16 15:21:04 UTC --- The runtime crashes at libobj.c/ivars.c line 191: count = ivar_list->ivar_count; The problem is that, when a class has no instance variables ivar_list will be NULL so this needs to be checked for. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug libobjc/51891] class_copyIvarList crashes on empty ivars 2012-01-18 10:07 [Bug libobjc/51891] New: class_copyIvarList crashes on empty ivars tilo at pruetz dot net 2012-01-19 1:36 ` [Bug libobjc/51891] " pinskia at gcc dot gnu.org 2012-09-16 15:21 ` dpapavas at gmail dot com @ 2014-12-08 21:31 ` larry.campbell at gmail dot com 2014-12-24 16:28 ` dpapavas at gmail dot com ` (2 subsequent siblings) 5 siblings, 0 replies; 7+ messages in thread From: larry.campbell at gmail dot com @ 2014-12-08 21:31 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=51891 --- Comment #2 from Larry Campbell <larry.campbell at gmail dot com> --- Is anyone going to fix this? It is quite debilitating and there is no good workaround. Prior to gcc 4.6 one could include objc/deprecated/struct_objc_class.h and inspect ivar_list yourself before calling class_copyIvarList. Now that the ABI internals are private, this is no longer an option, and it's impossible to protect against. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug libobjc/51891] class_copyIvarList crashes on empty ivars 2012-01-18 10:07 [Bug libobjc/51891] New: class_copyIvarList crashes on empty ivars tilo at pruetz dot net ` (2 preceding siblings ...) 2014-12-08 21:31 ` larry.campbell at gmail dot com @ 2014-12-24 16:28 ` dpapavas at gmail dot com 2015-01-09 18:13 ` mrs at gcc dot gnu.org 2015-01-09 18:14 ` mrs at gcc dot gnu.org 5 siblings, 0 replies; 7+ messages in thread From: dpapavas at gmail dot com @ 2014-12-24 16:28 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=51891 --- Comment #3 from Dimitris Papavasiliou <dpapavas at gmail dot com> --- Created attachment 34329 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34329&action=edit A patch that fixes the issue and provides a suitable testcase. ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug libobjc/51891] class_copyIvarList crashes on empty ivars 2012-01-18 10:07 [Bug libobjc/51891] New: class_copyIvarList crashes on empty ivars tilo at pruetz dot net ` (3 preceding siblings ...) 2014-12-24 16:28 ` dpapavas at gmail dot com @ 2015-01-09 18:13 ` mrs at gcc dot gnu.org 2015-01-09 18:14 ` mrs at gcc dot gnu.org 5 siblings, 0 replies; 7+ messages in thread From: mrs at gcc dot gnu.org @ 2015-01-09 18:13 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=51891 --- Comment #4 from mrs at gcc dot gnu.org <mrs at gcc dot gnu.org> --- Author: mrs Date: Fri Jan 9 18:12:51 2015 New Revision: 219399 URL: https://gcc.gnu.org/viewcvs?rev=219399&root=gcc&view=rev Log: Added PR libobjc/51891. Modified: trunk/gcc/testsuite/ChangeLog trunk/libobjc/ChangeLog ^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug libobjc/51891] class_copyIvarList crashes on empty ivars 2012-01-18 10:07 [Bug libobjc/51891] New: class_copyIvarList crashes on empty ivars tilo at pruetz dot net ` (4 preceding siblings ...) 2015-01-09 18:13 ` mrs at gcc dot gnu.org @ 2015-01-09 18:14 ` mrs at gcc dot gnu.org 5 siblings, 0 replies; 7+ messages in thread From: mrs at gcc dot gnu.org @ 2015-01-09 18:14 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=51891 mrs at gcc dot gnu.org <mrs at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED CC| |mrs at gcc dot gnu.org Resolution|--- |FIXED --- Comment #5 from mrs at gcc dot gnu.org <mrs at gcc dot gnu.org> --- Fixed. ^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2015-01-09 18:14 UTC | newest] Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2012-01-18 10:07 [Bug libobjc/51891] New: class_copyIvarList crashes on empty ivars tilo at pruetz dot net 2012-01-19 1:36 ` [Bug libobjc/51891] " pinskia at gcc dot gnu.org 2012-09-16 15:21 ` dpapavas at gmail dot com 2014-12-08 21:31 ` larry.campbell at gmail dot com 2014-12-24 16:28 ` dpapavas at gmail dot com 2015-01-09 18:13 ` mrs at gcc dot gnu.org 2015-01-09 18:14 ` mrs at gcc dot gnu.org
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