Parmanoir

NSThread's callStackSymbols will dump the call stack in an array. What is usually the realm of gdb, callStackSymbols will do at runtime.

Here's how it looks called during awakeFromNib :

0   MyApp          -[MyAppDelegate awakeFromNib] + 44
1   CoreFoundation -[NSSet makeObjectsPerformSelector:] + 205
2   AppKit         -[NSIBObjectData nibInstantiateWithOwner:topLevelObjects:] + 1445
3   AppKit         loadNib + 226
4   AppKit         +[NSBundle(NSNibLoading) _loadNibFile:nameTable:withZone:ownerBundle:] + 248
5   AppKit         +[NSBundle(NSNibLoading) loadNibNamed:owner:] + 326
6   AppKit         NSApplicationMain + 279

When are bindings calling your code ? Walk up the callstack and look for NSBinder :

0   MyApp      -[MyAppDelegate setSliderValue:] + 67
1   Foundation _NSSetIntValueAndNotify + 256
2   Foundation -[NSObject(NSKeyValueCoding) setValue:forKey:] + 434
3   Foundation -[NSObject(NSKeyValueCoding) setValue:forKeyPath:] + 240
4   AppKit     -[NSBinder _setValue:forKeyPath:ofObject:mode:validateImmediately:raisesForNotApplicableKeys:error:] + 264
5   AppKit     -[NSBinder setValue:forBinding:error:] + 266
6   AppKit     -[NSValueBinder _applyObjectValue:forBinding:canRecoverFromErrors:handleErrors:typeOfAlert:discardEditingCallback:otherCallback:callbackContextInfo:didRunAlert:] + 197
7   AppKit     -[NSValueBinder applyDisplayedValueHandleErrors:typeOfAlert:canRecoverFromErrors:discardEditingCallback:otherCallback:callbackContextInfo:didRunAlert:] + 567
8   AppKit     -[NSValueBinder performAction:] + 300
9   AppKit     -[_NSBindingAdaptor _objectDidTriggerAction:bindingAdaptor:] + 136
10  AppKit     -[NSControl sendAction:to:] + 63
11  AppKit     -[NSCell trackMouse:inRect:ofView:untilMouseUp:] + 1715
12  AppKit     -[NSSliderCell trackMouse:inRect:ofView:untilMouseUp:] + 1053
13  AppKit     -[NSControl mouseDown:] + 624
14  AppKit     -[NSWindow sendEvent:] + 5409
15  AppKit     -[NSApplication sendEvent:] + 4719
16  AppKit     -[NSApplication run] + 474
17  AppKit     NSApplicationMain + 364

Writing recursive code and stuck with a method definition that does not specify the recursion depth ? Count how many times the method appears in the call stack.

If you have a dummy NSLog that you want gone but can't find among the legit ones, add this to your precompiled header :

#define NSLog(args...) NSLog(args), NSLog(@"%@", [NSThread callStackSymbols])

It will call the original NSLog and pinpoint the offending function.