Many C/C++/Fortran and other programmers would have come across "stack overflow" errors. My question is, Is there a tool, a program or a simple code snippet, that allow us to monitor or check the size of the stack while the program is running? This may be helpful to pinpoint where the stack is being accumulated and eventually causing overflow.
I don't know if there is a program that'll do it for you, but you can easily check inside a function where the stack pointer is (at least in C and C++). Just look at the memory location of any variable. It won't be the exact location, but should be within a few bytes (which is fine for your purposes), since local variables are defined on the stack. If you want the exact value you can get that through assembly I believe.
It might be easier to just look at the stack trace when the program crashes, though.