Le 2 nov. 2012 à 12:11, Tom Davie a écrit : > Heya, > > We unfortunately are running into this same issue now. Did you manage to > find a solution to the crash?
Not yet. I was hoping that Richard or David had some ideas about this issue. Did you try to disable the pool caching code entirely? I should probably try that next week. Cheers, Quentin. > 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
