strange NSWindowController memory leak
strange NSWindowController memory leak
- Subject: strange NSWindowController memory leak
- From: Georg Tuparev <email@hidden>
- Date: Mon, 22 Nov 2004 02:20:26 +0100
Folks,
I discovered a NSWindowController (non document based application) that
leaks badly - to be more precise retain count is 10 instead of 1. When
looking at this with ObjectAlloc I found following suspiciously looking
retain events (all retains took place during Window Controller's
showWindow method called immediately after initWithWindowNibName:):
Event: (#131046) ObjectRetainedEvent
Time Index: 122777726.693979
Category: NVLogViewerWindowController
Pointer: 0x642b50 Size: 160
Thread: 0x307 Extra Data: 0x3
Backtrace:
NSRecordAllocationEvent
NSIncrementExtraRefCount
-[NSObject retain]
-[_NSBindingInfo initWithController:key:valueTransformer:binding:]
-[NSBinder
addBinding:toController:withKeyPath:valueTransformer:options:]
-[NSEditableBinder
addBinding:toController:withKeyPath:valueTransformer:options:]
-[NSObject(NSKeyValueBindingCreation)
bind:toObject:withKeyPath:options:]
-[NSIBObjectData nibInstantiateWithOwner:topLevelObjects:]
loadNib
+[NSBundle(NSNibLoading) _loadNibFile:nameTable:withZone:ownerBundle:]
+[NSBundle(NSNibLoading) loadNibFile:externalNameTable:withZone:]
-[NSWindowController loadWindow]
-[NSWindowController window]
-[NSWindowController showWindow:]
-[NVServerMonitorWindowController showLogWindow:]
NVServerMonitorWindowController.m:50
-[NSApplication sendAction:to:from:]
-[NSControl sendAction:to:]
-[NSCell _sendActionFrom:]
-[NSCell trackMouse:inRect:ofView:untilMouseUp:]
-[NSButtonCell trackMouse:inRect:ofView:untilMouseUp:]
-[NSControl mouseDown:]
-[NSWindow sendEvent:]
-[NSApplication sendEvent:]
-[NSApplication run]
NSApplicationMain
main() main.m:17
_start() crt.c:267
start
This looks like the buggy binding memory management discussed on this
forum few months ago. Well, there are no NSControllers in this nib. But
I remember that in a very early version, we were using
NSArrayController bound to a NSPopUpButton.
Q1. Is it possible that although we do not use binding in this nib, the
binding leak is still present after removing both NSArrayController and
the NSPopUpButton?
Q2. If the answer of my first question is yes, how can I clean the mess
without redoing the entire nib?
TIA
Georg Tuparev
Tuparev Technologies
Klipper 13
1186 VR Amstelveen
The Netherlands
Mobile: +31-6-55798196
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