local type,pcall,rawequal,tostring=type,pcall,rawequal,tostring
local global_ls=loadstring
local env=getgenv and getgenv() or _G
local env_ls=env and env.loadstring
local dbg=debug
local info_ref=dbg and (dbg.info or dbg.getinfo)
local dump_ref=string.dump
local pcall_ref=pcall
local getgenv_ref=getgenv
local function native_loader(fn)
  if type(fn)~="function" then return false,"type" end
  local ok,chunk=pcall(fn,"return 0x5EC0A1")
  if not ok or type(chunk)~="function" then return false,"canary_load" end
  local ok2,value=pcall(chunk)
  if not ok2 or value~=0x5EC0A1 then return false,"canary_run" end
  if dump_ref then
    local dumped=pcall(dump_ref,fn)
    if dumped then return false,"dump" end
  end
  if info_ref then
    local got,info=pcall(info_ref,fn,"s")
    if got and info~=nil then
      if type(info)=="string" and info~="[C]" then return false,"info:"..tostring(info) end
      if type(info)=="table" and info.what and info.what~="C" then return false,"infotable" end
    end
  end
  return true
end
print("identity",rawequal(env_ls,global_ls),rawequal(pcall_ref,pcall),rawequal(getgenv_ref,getgenv))
print("info_ref",rawequal(info_ref,dbg and (dbg.info or dbg.getinfo)))
print("dump_ref",rawequal(dump_ref,string.dump))
print("native",native_loader(global_ls))
print("global",type(global_ls),tostring(global_ls))
print("env",type(env_ls),tostring(env_ls))
print("info",tostring(info_ref))
print("dump",tostring(dump_ref))