Hello,
Can you post a small test-case so we can investigate the issue ?
Regards, Laurent Etiemble.
2009/11/18 Duane Wandless <du...@wandless.net>:
> I am getting the full call stack below when running, on SL and Leopard.
> Using 2.4.2.3 and Monobjc 2.0.413.0. Now I'm pretty confident this is a
> terrible solution I found. Any suggestions on how I can address this
> correctly would be greatly appreciated.
>
> I traced the workaround to NSProxy.Dealloc(). I added:
> if (this == null)
> return;
> And adding the check (see below) on cls.Name == "Proxy" to
> ObjectiveCRuntime.GetInstance(IntPtr, bool).
>
> Then the crash no longer occurs. But this does not resolve why 'this' is
> null when Dealloc is being called nor why an object of NSProxy is being
> referenced in GetInstance.
>
> I added logging to ObjectiveCRuntime.GetInstance(IntPtr, bool) as well as
> the return null if class name is "NSProxy".
>
> // If no match, try to see if there is an
> inheritance relationship
> if (result == default(TClass))
> {
> Class cls = Class.GetClassFromType(typeof
> (TClass));
> Console.WriteLine("Monobjc class name: {0}
> ip {1:X} {2}", cls.Name, value, canFail);
> if (cls.Name == "NSProxy")
> return null;
>
> I also added logging to Dealloc to print out what object is being
> deallocated. I see lots of this:
> Console.WriteLine("nativeptr {0:X} {1}", this.NativePointer,
> this.Class.Name);
>
> nativeptr 398951232 _IKIRLMainProxy
> nativeptr 402144384 _IKIRLMainProxy
> nativeptr 402144400 _IKIRLMainProxy
> nativeptr 402167744 _IKIRLMainProxy
> nativeptr 398909232 _IKIRLMainProxy
> nativeptr 398940800 _IKIRLMainProxy
>
> Whenever I alt-tab away from my window and come back this output streams for
> hundreds of lines with every once in a while a reference to Dealloc having a
> this pointer that is null.
>
> So some questions. Should an NSProxy class ever be checked in GetInstance?
> Is the constant Dealloc-ing of _IKIRLMainProxy expected? Any ideas on how
> this becomes null and then dealloc is called?
>
> thanks!
> Duane
>
> Here is the call stack from C#.
>
> (gdb) p (char *)mono_pmip (0x058db27e)
> $6 = 0x18128d90 " (wrapper managed-to-native)
> Monobjc.ObjectiveCRuntime:isKindOfClass (intptr,intptr,intptr) + 0x2e
> (0x58db250 0x58db2a4) [0x20bde58 - MacMonoClient.exe]"
> (gdb) p (char *)mono_pmip (0x03f0ef22)
> $7 = 0x17196eb0 " Monobjc.ObjectiveCRuntime:GetInstance<object>
> (intptr,bool) + 0x152 (0x3f0edd0 0x3f0f431) [0x20bde58 - MacMonoClient.exe]"
> (gdb) p (char *)mono_pmip (0x03f0edbf)
> $8 = 0x1717f690 " Monobjc.ObjectiveCRuntime:GetInstance<object> (intptr) +
> 0x27 (0x3f0ed98 0x3f0edc4) [0x20bde58 - MacMonoClient.exe]"
> (gdb) p (char *)mono_pmip (0x180c4eee)
> $9 = 0x1812ccd0 " Monobjc.Dynamic.Proxies.Monobjc.Cocoa.NSProxy:Dealloc
> (intptr,intptr) + 0x16 (0x180c4ed8 0x180c4eff) [0x20bde58 -
> MacMonoClient.exe]"
> (gdb) p (char *)mono_pmip (0x03f017e6)
> $10 = 0x1812c770 " (wrapper native-to-managed)
> Monobjc.Dynamic.Proxies.Monobjc.Cocoa.NSProxy:Dealloc (intptr,intptr) + 0x2e
> (0x3f017b8 0x3f017f2) [0x20bde58 - MacMonoClient.exe]"
>
> Monobjc class name: NSProxy ip 401881888 False
> 2009-11-17 18:35:45.576 PIXFiles[11651:980b] An uncaught exception was
> raised
> 2009-11-17 18:35:45.577 PIXFiles[11651:980b] *** -[NSProxy
> doesNotRecognizeSelector:isKindOfClass:] called!
> 2009-11-17 18:35:45.579 PIXFiles[11651:980b] *** Terminating app due to
> uncaught exception 'NSInvalidArgumentException', reason: '*** -[NSProxy
> doesNotRecognizeSelector:isKindOfClass:] called!'
> *** Call stack at first throw:
> (gdb) where
> #0 0x9264fb07 in ___TERMINATING_DUE_TO_UNCAUGHT_EXCEPTION___ ()
> #1 0x94e1cf49 in objc_exception_throw ()
> #2 0x926052b8 in +[NSException raise:format:arguments:] ()
> #3 0x9260522a in +[NSException raise:format:] ()
> #4 0x96a42b51 in -[NSProxy doesNotRecognizeSelector:] ()
> #5 0x925ad026 in ___forwarding___ ()
> #6 0x925acbf2 in __forwarding_prep_0___ ()
> #7 0x96a43040 in -[NSProxy isKindOfClass:] ()
> #8 0x058db27e in ?? ()
> #9 0x03f0ef22 in ?? ()
> #10 0x03f0edbf in ?? ()
> #11 0x180c4eee in ?? ()
> #12 0x03f017e6 in ?? ()
> #13 0x90014f2e in -[_IKIRLMainProxy dealloc] ()
> #14 0x9253f9d8 in CFRelease ()
> #15 0x9256c5bd in _CFAutoreleasePoolPop ()
> #16 0x9690be62 in NSPopAutoreleasePool ()
> #17 0x9690bd8a in -[NSAutoreleasePool drain] ()
> #18 0x900cbdea in -[IKTaskManager taskLoop] ()
> #19 0x9691e964 in -[NSThread main] ()
> #20 0x9691e914 in __NSThread__main__ ()
> #21 0x90468f39 in _pthread_start ()
> #22 0x90468dbe in thread_start ()
>
