debug.getinfo

Returns a table describing a function or a running stack frame.

debug.getinfo(target: function | number): table

debug.getinfo accepts either a function or a number. Hand it a function and the returned table describes that function. Hand it a number and it is read as a stack level - 0 is the call you are in right now, 1 is the caller above it, and so on - and the returned table describes whichever frame is running at that level.

Most commonly used while reversing a game script: you find an unknown closure with getgc and call debug.getinfo on it to learn what it is, where it came from, and how many arguments it takes before you decide what to do with it.

Parameters

Form A - function

Parameter	Type	Description
func	function	The function to inspect.

Returns

table - a single table with the same fields for both forms:

Field	Type	Description
source	string	Name of the chunk that created the function.
short_src	string	Short, printable version of source.
func	function	The function itself.
what	string	"Lua" for a Luau function, "[C]" for a C function.
currentline	number	The line currently running. -1 when no line information is available.
name	string	The function’s name. A blank string when no name can be found.
nups	number	Number of upvalues the function captured.
numparams	number	Number of declared parameters. Always 0 for C functions.
is_vararg	number	1 if the function takes a variadic argument, 0 if it does not.

Aliases

• getinfo

Example

While reversing a script in a Roblox game, sweep getgc for an unknown 2-arg Luau closure and identify it before you decide to hook or read it.

Example 1

<<<<<<< HEAD
local getinfo = debug.getinfo(function(...) end)
=======
-- debug.getinfo(target: function | number): table
>>>>>>> 50e30f53759b0538759af25c9b271514aa2c9290

Standard fields match Lua’s debug library specifications.