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Messaging Nil

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Messaging Nil

Subject: Messaging Nil
From: Bill Bumgarner <email@hidden>
Date: Thu, 3 Jan 2008 09:02:09 -0800

If anyone is interested, I wrote up a set of weblog posts documenting a couple of different non-gdb methods of figuring out what methods are being invoked on nil (which, regardless of your opinion of "nil eats messages" as a feature or weakness of the language, unexpectedly nil objects can be a major pain in the butt to debug).

A hack to log method invocations:

http://www.friday.com/bbum/2008/01/01/objective-c-a-hack-to-log-all-methods/

Expanding the hack into a runtime centric way of logging messages to nil:

http://www.friday.com/bbum/2008/01/02/objective-c-logging-messages-to-nil/

Using dtrace to analyze messages to nil:

http://www.friday.com/bbum/2008/01/03/objective-c-using-dtrace-to-trace-messages-to-nil/

b.bum
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