[Pythonmac-SIG] NSZombies eating my brain
Saggau
saggau at gmail.com
Mon Apr 10 03:09:51 CEST 2006
- initWithPythonObject:(PyObject*)v;
{
self = [super init];
if (!self) return nil;
Py_INCREF(v);
Py_XDECREF(value);
value = v;
return self;
}
In gdb the variable v is showing up as 0x0. when I break on [OC_PythonArray
initWithPythonObject:] (There was a typo in my original post, I think) ;)
Could this be the problem?
On 4/9/06, Saggau <saggau at gmail.com> wrote:
>
> Hi again folks.
>
> System version = 2.3.5 (#1, Mar 20 2005, 20:38:20)
> [GCC 3.3 20030304 (Apple Computer, Inc. build 1809)]
> (Built-in)
>
> PyObjC from SVN as of about a week ago.
>
> So I've done this:
> from PyObjCTools import Signals
> Signals.dumpStackOnFatalSignal()
> from PyObjCTools import Debugging
> Debugging.installVerboseExceptionHandler()
>
> NSZombie is enabled (Thanks Bob I!)
>
> I've an NSArrayController to which I add a pretty extensive python object
> that subclasses NSObject that also has some "straight - up" python objects
> as attributes. Any more of a description would probably require someone to
> peer into my SVN repository, which I'm happy to share whith those who want
> to go the extra mile. (!)
>
> I've tried running in gdb with a breakpoint on -[_NSZombie retain], but I
> don't really know what I'm looking for. I'm looking at a lot of hex memory
> addresses with very little human-readable stuff in there. Am I missing some
> debugging symbols in python/pyobjc?
>
> I tried setting a breakpoint at (+[OC_PythonArray newWithPythonObject:])
> to see perhaps what proxy objects are being instantiated, but I'm clearly in
> over my depth. Much googling, rtfm, stfw, etc. has gotten me to some
> interesting articles on malloc scribble and the like, but there is very
> little (that I can find) that leads this newbie in the right direction re:
> NSZombie eating my pybojc app!
>
> Stack traces below. Thanks to all who have helped thus far.
>
> Cheers,
> Jonathan Saggau
>
> Here is the bt when gdb hits NSZombie retain. Anybody have a clue-by-four
> for me?
> #0 0x92a43c80 in -[_NSZombie retain] ()
> #1 0x9396c690 in -[_NSModelObservingTracker
> setIndexReferenceModelObjectArray:clearAllModelObjectObserving:] ()
> #2 0x93980c54 in -[NSSelectionBinder
> _adjustObject:mode:observedController:observedKeyPath:context:editableState:adjustState:]
> ()
> #3 0x939499a8 in -[NSValueBinder
> _observeValueForKeyPath:ofObject:context:] ()
> #4 0x939808f4 in -[NSSelectionBinder
> observeValueForKeyPath:ofObject:change:context:] ()
> #5 0x929fcd08 in -[NSObject(NSKeyValueObservingPrivate)
> _notifyObserversForKeyPath:change:] ()
> #6 0x93972608 in -[NSController _notifyObserversForKeyPath:change:] ()
> #7 0x9397246c in -[NSArrayController
> didChangeValuesForArrangedKeys:objectKeys:indexKeys:] ()
> #8 0x93bf6c0c in -[NSArrayController
> _insertObject:atArrangedObjectIndex:objectHandler:] ()
> #9 0x005072e8 in _ffi_call_DARWIN () at
> libffi-src/src/powerpc/darwin.S:119
> #10 0x00506f00 in ffi_call (cif=0x1147470, fn=0x800000, rvalue=0x1147470,
> avalue=0x0) at libffi-src/src/powerpc/ffi_darwin.c:396
> #11 0x00513da0 in PyObjCFFI_Caller (aMeth=0x4406b0, self=0x438170,
> args=0x103b2f0) at Modules/objc/libffi_support.m:1293
> #12 0x00526eb0 in objcsel_call (self=0x4406b0, args=0x103b2f0) at
> Modules/objc/selector.m:516
> #13 0x986e88e0 in PyObject_Call ()
> #14 0x9874835c in PyEval_GetFuncDesc ()
> #15 0x98747d4c in PyEval_GetFuncDesc ()
> #16 0x98745414 in PyEval_EvalCode ()
> #17 0x987465e4 in PyEval_EvalCodeEx ()
> #18 0x986fd530 in PyFunction_SetClosure ()
> #19 0x986e88e0 in PyObject_Call ()
> #20 0x00527f88 in pysel_call (self=0x40dbe0, args=0x0, kwargs=0x410cf0) at
> Modules/objc/selector.m:941
> #21 0x986e88e0 in PyObject_Call ()
> #22 0x00510958 in method_stub (cif=0x1147470, resp=0xbfffc510,
> args=0xbfffc440, _userdata=0x0) at Modules/objc/libffi_support.m:479
> #23 0x00507104 in ffi_closure_helper_DARWIN (closure=0x1147470,
> rvalue=0xbfffc510, pgr=0x1147470, pfr=0x0) at
> libffi-src/src/powerpc/ffi_darwin.c:699
> #24 0x005073b4 in _ffi_closure_ASM () at darwin_closure.S:92
> #25 0x937c1270 in -[NSApplication sendAction:to:from:] ()
> #26 0x937c11a4 in -[NSControl sendAction:to:] ()
> #27 0x937c1084 in -[NSCell _sendActionFrom:] ()
> #28 0x937db09c in -[NSCell trackMouse:inRect:ofView:untilMouseUp:] ()
> #29 0x937dac84 in -[NSButtonCell trackMouse:inRect:ofView:untilMouseUp:]
> ()
> #30 0x937da6a8 in -[NSControl mouseDown:] ()
> #31 0x9377beb0 in -[NSWindow sendEvent:] ()
> #32 0x93724ef4 in -[NSApplication sendEvent:] ()
> #33 0x9371c330 in -[NSApplication run] ()
> #34 0x9380ce68 in NSApplicationMain ()
> #35 0x010496f4 in objc_NSApplicationMain (self=0x1147470, args=0x90ab1aa0,
> kwds=0x1147470) at Modules/AppKit/_AppKit.m:129
> #36 0x98747c5c in PyEval_GetFuncDesc ()
> #37 0x98745414 in PyEval_EvalCode ()
> #38 0x987465e4 in PyEval_EvalCodeEx ()
> #39 0x98747f90 in PyEval_GetFuncDesc ()
> #40 0x98747d34 in PyEval_GetFuncDesc ()
> #41 0x98745414 in PyEval_EvalCode ()
> #42 0x987465e4 in PyEval_EvalCodeEx ()
> #43 0x98742eb8 in PyEval_EvalCode ()
> #44 0x9876708c in PyRun_FileExFlags ()
> #45 0x9873c210 in _PyUnicodeUCS2_IsAlpha ()
> #46 0x98747c5c in PyEval_GetFuncDesc ()
> #47 0x98745414 in PyEval_EvalCode ()
> #48 0x987465e4 in PyEval_EvalCodeEx ()
> #49 0x98747f90 in PyEval_GetFuncDesc ()
> #50 0x98747d34 in PyEval_GetFuncDesc ()
> #51 0x98745414 in PyEval_EvalCode ()
> #52 0x987465e4 in PyEval_EvalCodeEx ()
> #53 0x98742eb8 in PyEval_EvalCode ()
> #54 0x9876708c in PyRun_FileExFlags ()
> #55 0x987660b0 in PyRun_SimpleFileExFlags ()
> #56 0x00003db0 in ?? ()
> #57 0x00003e50 in ?? ()
> #58 0x00002414 in ?? ()
> #59 0x8fe01048 in __dyld__dyld_start ()
>
> And here's the trace output in the console when the app just pukes running
> outside of gdb
>
> Stack trace (most recent call last):
> 0x00002414 (in Trigger)
> 0x00003e50 (in Trigger)
> 0x00003db0 (in Trigger)
> _PyRun_SimpleFileExFlags (in Python)
> _PyRun_FileExFlags (in Python)
> _PyEval_EvalCode (in Python)
> _PyEval_EvalCodeEx (in Python)
> _PyEval_EvalCode (in Python)
> _PyEval_GetFuncDesc (in Python)
> _PyEval_GetFuncDesc (in Python)
> _PyEval_EvalCodeEx (in Python)
> _PyEval_EvalCode (in Python)
> _PyEval_GetFuncDesc (in Python)
> __PyUnicodeUCS2_IsAlpha (in Python)
> _PyRun_FileExFlags (in Python)
> _PyEval_EvalCode (in Python)
> _PyEval_EvalCodeEx (in Python)
> _PyEval_EvalCode (in Python)
> _PyEval_GetFuncDesc (in Python)
> _PyEval_GetFuncDesc (in Python)
> _PyEval_EvalCodeEx (in Python)
> _PyEval_EvalCode (in Python)
> _PyEval_GetFuncDesc (in Python)
> _objc_NSApplicationMain (in _AppKit.so) (_AppKit.m:129)
> _NSApplicationMain (in AppKit)
> -[NSApplication run] (in AppKit)
> -[NSApplication sendEvent:] (in AppKit)
> -[NSWindow sendEvent:] (in AppKit)
> -[NSControl mouseDown:] (in AppKit)
> -[NSButtonCell trackMouse:inRect:ofView:untilMouseUp:] (in AppKit)
> -[NSCell trackMouse:inRect:ofView:untilMouseUp:] (in AppKit)
> -[NSCell _sendActionFrom:] (in AppKit)
> -[NSControl sendAction:to:] (in AppKit)
> -[NSApplication sendAction:to:from:] (in AppKit)
> _ffi_closure_ASM (in _objc.so) (darwin_closure.S:95)
> _ffi_closure_helper_DARWIN (in _objc.so) (ffi_darwin.c:703)
> _method_stub (in _objc.so) (libffi_support.m:479)
> _PyObject_Call (in Python)
> _pysel_call (in _objc.so) (selector.m:941)
> _PyObject_Call (in Python)
> _PyFunction_SetClosure (in Python)
> _PyEval_EvalCodeEx (in Python)
> _PyEval_EvalCode (in Python)
> _PyEval_GetFuncDesc (in Python)
> _PyEval_GetFuncDesc (in Python)
> _PyObject_Call (in Python)
> _objcsel_call (in _objc.so) (selector.m:517)
> _PyObjCFFI_Caller (in _objc.so) (libffi_support.m:1300)
> _ffi_call (in _objc.so) (ffi_darwin.c:404)
> _ffi_call_DARWIN (in _objc.so) (darwin.S:121)
> -[NSArrayController _insertObject:atArrangedObjectIndex:objectHandler:]
> (in AppKit)
> -[NSArrayController
> didChangeValuesForArrangedKeys:objectKeys:indexKeys:] (in AppKit)
> -[NSController _notifyObserversForKeyPath:change:] (in AppKit)
> -[NSObject(NSKeyValueObservingPrivate)
> _notifyObserversForKeyPath:change:] (in Foundation)
> -[NSSelectionBinder observeValueForKeyPath:ofObject:change:context:] (in
> AppKit)
> -[NSValueBinder _observeValueForKeyPath:ofObject:context:] (in AppKit)
> -[NSSelectionBinder
> _adjustObject:mode:observedController:observedKeyPath:context:editableState:adjustState:]
> (in AppKit)
> -[_NSModelObservingTracker
> setIndexReferenceModelObjectArray:clearAllModelObjectObserving:] (in AppKit)
>
> -[_NSZombie retain] (in Foundation)
> +[NSException raise:format:] (in Foundation)
> _NSExceptionHandlerExceptionRaiser (in ExceptionHandling)
> 2006-04-09 16:13:52.454 Trigger[762] NSGenericException - *** Selector
> 'retain' sent to dealloced instance 0x1147be0 of class OC_PythonArray.
> Break at '-[_NSZombie retain]' to debug.
>
>
>
> --
> The extent to which an individual can resist being blindly led by
> tradition is a good measure of his vitality. - Harry Partch
>
> There is a computer disease that anybody who works with computers knows
> about. It's a very serious disease and it interferes completely with the
> work. The trouble with computers is that you 'play' with them! - Richard P.
> Feynman
>
> Few people are capable of expressing with equanimity opinions which differ
> from the prejudices of their social environment. Most people are not even
> capable of forming such opinions. - Einstein
>
>
--
The extent to which an individual can resist being blindly led by tradition
is a good measure of his vitality. - Harry Partch
There is a computer disease that anybody who works with computers knows
about. It's a very serious disease and it interferes completely with the
work. The trouble with computers is that you 'play' with them! - Richard P.
Feynman
Few people are capable of expressing with equanimity opinions which differ
from the prejudices of their social environment. Most people are not even
capable of forming such opinions. - Einstein
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