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Setting watchpoints in GDB



Hi all,

I'm trying to workout how some values in some of my data structures are being changed. It's all part of me trying to learn bindings, and trying to understand how values are being edited even though I haven't got KVC compliant methods in my class.

So I thought I'd set a watchpoint on the pointer stored in my class. Looking through the whole of the Xcode UI and the Xcode documentation I can see no mention of watchpoints. So, after hitting a breakpoint in my init routine, I set one up using the gdb console command 'watch <expression>', then hit continue. At which point my Cocoa app just freezes, and I'm unable to interrupt execution using the pause button in Xcode. The only thing to do is to kill the process.

Are watchpoints expected to work?
Has anybody any experience with them?
Any other suggestions that will allow me to see when a memory location changes?


Thanks

Paul

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