Is it possible to predict a stack overflow in C on Linux?

Question

There are certain conditions that can cause stack overflows on an x86 Linux system:

• struct my_big_object[HUGE_NUMBER] on the stack. Walking throu

Answer 1

There isn't a nice way I can think of. Maybe it is possible by using getrlimit() (suggested before) and some pointer arithmetic? But first ask yourself if you really want this.

void *closeToBase;

main () {
  int closeToBase;
  stackTop = &closeToBase;
}

int stackHasRoomFor(int bytes) {
  int currentTop;
  return getrlimit(...) - (¤tTop  - closeToBase) > bytes + SomeExtra;
}

Personally, I'd not do this. Allocate big things on the heap, the stack was not meant for it.