Suspected Stack Overflow - how to detect/confirm?

[mykepredko]

Hi Folks,

In the main process of my application, inside one function, I call another function which uses the tty(b) driver to send out an ASCIIZ string.  When this function is called, the app crashes (and causes a segmentation fault on my PC which is running CW when I'm debugging - which is strange). 

However, if the error condition which causes the upchuck during the tty write does not occur, execution continues normally - in fact, the tty ASCIIZ function is called later in the program to give a status and there are no issues. 

I suspect that I have a stack issue in the main process - is there any way to confirm that this is what's happening? 

Does anybody have any ideas why CW has the crash as well? 

Thanx,

myke

[LordMark · Accepted solution]

You may try to use the task aware debugging (TAD) in codewarrior. It shows you the stack memory and stack overflow situations.

[mykepredko]

Hi Mark,

Thank you - that sounds like a good suggestion.

I increased the task's stack by 256 bytes and the problem has gone away.

I'm still curious as to why I had the problem with CW and the PC it is running on - anybody have any ideas? 

myke