local profile = require"jit.profile"
local function start(period,file)
	local function cb(thread,samples,vmstate)
		file:write(profile.dumpstack(thread,"pF l;",-100), vmstate, " ", samples, "\n")
	end
	profile.start("vli"..tonumber(period), cb)
end
local function stop() profile.stop() end


return {start=start,stop=stop}