Heya, We unfortunately are running into this same issue now. Did you manage to find a solution to the crash?
Thanks Tom Davie On 31 Oct 2012, at 18:37, Quentin Mathé <[email protected]> wrote: > Hi, > > The NSAutoreleasePool implementation bound to the ARC_RUNTIME has some issues > I think. > > For the same current pool instance, it calls push_pool_to_cache() twice, once > in -emptyPool and another -dealloc. Which means a pool still in use can be > reused, then it's possible to get stuck in an infinite loop. For example, in > > - (void) emptyPool > { > struct autorelease_thread_vars *tv = ARP_THREAD_VARS; > > // Infinite loop when pool == pool->_child > while (_child) > { > NSAutoreleasePool *pool = _child; > _child = pool->_child; > push_pool_to_cache(tv, pool); > } > > Here is a partial backtrace for this problem : > > #0 0xb7a29933 in -[NSAutoreleasePool emptyPool] (self=0x8cf7f34, > _cmd=0xb7f3d000) > at NSAutoreleasePool.m:413 > #1 0xb7a29d07 in -[NSAutoreleasePool dealloc] (self=0x8cf7f34, > _cmd=0xb7f3cfe0) > at NSAutoreleasePool.m:739 > #2 0xb7a29c6e in -[NSAutoreleasePool release] (self=0x8cf7f34, > _cmd=0xb7f6dc28) > at NSAutoreleasePool.m:732 > #3 0xb7c29493 in -[NSRunLoop limitDateForMode:] (self=0x85a1b9c, > _cmd=0xb7f6db10, > mode=0x80f02e4) at NSRunLoop.m:1080 > #4 0xb7c2bac7 in -[NSRunLoop runMode:beforeDate:] (self=0x85a1b9c, > _cmd=0xb7f8ab78, > mode=0x80f02e4, date=0x8ea2dbc) at NSRunLoop.m:1255 > #5 0xb7d4b3db in -[GSMessageHandle sendMessage:beforeDate:] (self=0x8cf7dcc, > _cmd=0xb7f8ab10, components=0x86dd12c, when=0x8ea2dbc) at > NSMessagePort.m:1028 > #6 0xb7d5292c in -[NSMessagePort > sendBeforeDate:msgid:components:from:reserved:] ( > self=0x8cf3f34, _cmd=0xb7f46428, when=0x8ea2dbc, msgId=0, > components=0x86dd12c, > receivingPort=0x8cf5174, length=16) at NSMessagePort.m:1960 > #7 0xb7a9201d in -[NSConnection(Private) _sendOutRmc:type:] (self=0x8cf577c, > _cmd=0xb7f46198, c=0x86dd0bc, msgid=0) at NSConnection.m:3426 > #8 0xb7a8312b in -[NSConnection(GNUstepExtensions) > forwardInvocation:forProxy:] ( > self=0x8cf577c, _cmd=0xb7f4c0f8, inv=0x86dd064, object=0x8cf920c) > at NSConnection.m:2041 > #9 0xb7ae4ed1 in -[NSDistantObject forwardInvocation:] (self=0x8cf920c, > _cmd=0xb7f8bba0, anInvocation=0x86dd064) at NSDistantObject.m:606 > #10 0xb7d5a030 in GSFFIInvocationCallback (cif=0x86dcf50, retp=0xbfffe380, > args=0xbfffe300, user=0x8eb94b4) at GSFFIInvocation.m:623 > #11 0xb72e3176 in ?? () from /usr/lib/i386-linux-gnu/libffi.so.6 > #12 0xb72e3416 in ?? () from /usr/lib/i386-linux-gnu/libffi.so.6 > #13 0xb7aea7ea in -[NSDistributedNotificationCenter > addObserver:selector:name:object:suspensionBehavior:] (self=0x8cf11d4, > _cmd=0xb7f4d1e8, anObserver=0x8f99244, > aSelector=0xb5a108e8, notificationName=0xb5a107b8, anObject=0x0, > suspensionBehavior=2) at NSDistributedNotificationCenter.m:344 > #14 0xb7aea162 in -[NSDistributedNotificationCenter > addObserver:selector:name:object:] ( > self=0x8cf11d4, _cmd=0xb5a10a68, anObserver=0x8f99244, > aSelector=0xb5a108e8, > notificationName=0xb5a107b8, anObject=0x0) at > NSDistributedNotificationCenter.m:267 > > If I apply the patch in attachment, it isn't enough to solve the problem, > because I now get a crash I cannot explain when running the NSRunLoop. Here > is the backtrace : > > Program received signal SIGSEGV, Segmentation fault. > 0xb7852346 in objc_test_class_flag (aClass=0x74696c71, > flag=objc_class_flag_hidden_class) > at ./class.h:248 > 248 return (aClass->info & (unsigned long)flag) == (unsigned > long)flag; > (gdb) bt > #0 0xb7852346 in objc_test_class_flag (aClass=0x74696c71, > flag=objc_class_flag_hidden_class) at ./class.h:248 > #1 0xb7852d4b in object_getClass (obj=0x8e9454c) at runtime.c:757 > #2 0xb7d5a799 in GSObjCIsInstance (obj=0x8e9454c) at GSObjCRuntime.m:84 > #3 0xb7ab3139 in otherTime (other=0x8e9454c) at NSDate.m:109 > #4 0xb7ab65c4 in -[NSGDate earlierDate:] (self=0x8624f04, _cmd=0xb7f6da60, > otherDate=0x8e9454c) at NSDate.m:1461 > #5 0xb7c2bf6a in -[NSRunLoop runMode:beforeDate:] (self=0x85a1b9c, > _cmd=0xb7f6da40, > mode=0xb7f6d7f0, date=0x8e9454c) at NSRunLoop.m:1269 > #6 0xb7c2c40b in -[NSRunLoop runUntilDate:] (self=0x85a1b9c, > _cmd=0xb7fd7d58, > date=0x8e9454c) at NSRunLoop.m:1305 > #7 0xb7fc5189 in -[UKRunner runTest:onObject:class:] (self=0x8117c4c, > _cmd=0xb7fd7d78, > testSelector=0x8452e70, testObject=0x8e8177c, testClass=0xb5a38fe0) at > UKRunner.m:344 > #8 0xb7fc57fe in -[UKRunner runTests:onObject:] (self=0x8117c4c, > _cmd=0xb7fd7e30, > testMethods=0x8e81724, testObject=0x8e81744) at UKRunner.m:470 > #9 0xb7fc60e3 in -[UKRunner runTestsInClass:] (self=0x8117c4c, > _cmd=0xb7fd7eb0, > testClass=0xb5a38fe0) at UKRunner.m:522 > #10 0xb7fc689e in -[UKRunner runTests:inBundle:principalClass:] > (self=0x8117c4c, > _cmd=0xb7fd7cf0, testClasses=0x846e79c, bundle=0x8130984, > principalClass=0x0) > at UKRunner.m:560 > #11 0xb7fc2ecb in -[UKRunner runTests:inBundleAtPath:currentDirectory:] > (self=0x8117c4c, > _cmd=0xb7fd7e38, testClasses=0x846e79c, bundlePath=0x812c22c, cwd=0x8117c0c) > at UKRunner.m:145 > #12 0xb7fc3d33 in +[UKRunner runTests] (self=0xb7fd7c40, _cmd=0x804b7c0) > at UKRunner.m:190 > #13 0x08048977 in main (argc=1, argv=0xbffff814) at main.m:33 > > Any suggestions would be welcome, I'm a bit stuck :) > > I'm using both GNUstep Base and libobjc2 SVN trunk from today, Clang 3.1 > (with the non-fragile ABI) and Ubuntu Linux x86-32. > > Cheers, > Quentin. > > <NSAutoreleasePool.m.patch>_______________________________________________ > Gnustep-dev mailing list > [email protected] > https://lists.gnu.org/mailman/listinfo/gnustep-dev _______________________________________________ Gnustep-dev mailing list [email protected] https://lists.gnu.org/mailman/listinfo/gnustep-dev
