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How to calculate min stack size

PDelux

Hi
I'm looking for some ways to determine the min stack size i need for my C program. What is the easiest way to calculate how big the stack will grow during runtime?

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robfitz

On linux you can use ulimit to set the maximum stack size for a subprocess, the -s value is the size in kilobytes.

$ ulimit -s 16
$ java
# Crash

You can repeat the commands increasing the -s value until you program doesn't crash anymore.

Unless your developing for an embedded system you shouldn't have to worrry about the stack size. The problem is mostly likely with your code, you should change your code not to declare large structures on the stack, or not use recursion.

PDelux

Thanks robfitz, that's a good idea, I can try that.

It is actually an embedded system I'm working on(USB device) so I need to squeeze every last byte of RAM out of it.