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CodeWarrior 8- & 16-bit tools: Manage the Stack

Question asked by Marc Paquette Employee on Jan 27, 2006
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Posted: Nov 04, 2005 - 10:10 AM   
What kind of results do I expect when the stack overflows?
Posted: Nov 04, 2005 - 10:26 PM   
Very weird things can happen if the stack overflows. Have you checked your map file to see where your last variables are located. You could then look at your map file to get some idea of the level of calls that your code is going through. But it also depends on the number of parameters passed in on the stack.
On the Mac there used to be a stack snifer that would run off a timer interrupt and look at the stack.
Posted: Nov 12, 2005 - 10:50 AM   
I ALWAYS fill my memory space with an init pattern. That way I can easily look at the top of memory and see how far down the stack grows anytime you halt execution. If you start seeing it growing down further than you expect, then start looking for problems.
Also, keep 'strings' or other benign stuff up top in the space you use, so that if the stack clobbers something, you might get away with just a corrupted string that will show what happened but still be functional.