gnovm: decide maximum recursion depth perhaps defined by gas or with a preset maximum

[odeke-em]

I'd expect a smart contracting VM to have certain pre-defined limits that would control deep call routines and also memory limits because when I try to find the 60th Fibonacci number, this program hangs and most likely runs out of memory https://play.gno.land/p/FOEYk0mBinL

package hello

func main() {
	print(fib(60))
}

func fib(n int) int {
  if n <= 1 {
    return 1
  }
  return fib(n-1) + fib(n-2)
}

I think one way to reduce security blast radiuses is to particularly look at OpCall and for each function call graph, determine when it has run out of the allowed maximum recursion depth.

Solidity has a max recursion depth of 1024 per https://docs.soliditylang.org/en/latest/introduction-to-smart-contracts.html#message-calls