a lua hook that's called every 1000 instructions

luaCountHook.lua

local function hook(event)
  assert(event == "count")
  local info = debug.getinfo(2, "Sl") -- get source file related info (S) and current line (l)
  error("Code took to long (over 1000 instructions), aborted at file \"" .. info.short_src .. "\" line " .. info.currentline)
end

debug.sethook(hook, "", 1000) -- "" = when to call this hook, if any of "every line", "every function call" or "every function return", 1000 = call every 1000 instructions
local i = 0
while true do
  print(i)
  i = i + 1
end