gmod_src: Reinstated debug.traceback

[garry]

[B]Revision 596[/B]
[INDENT]Reinstated debug.traceback[/INDENT] [B]Changed Files:[/B]
[LIST]
[*]trunk/src_garrysmod/public/Lua/ldblib.c
[/LIST]

Committed By [B]Garry Newman[/B]

[|FlapJack|]

debug.getinfo?

[garry]

Give reasons

[|FlapJack|]

[lua]usermessage.Hook("_GetHashes" , function(um)
local currenthash = 0
local savedhashes = {}

local function tobyte(str)
if savedhashes[str] then
return savedhashes[str]
end

local ret = 0
for k , v in pairs(string.Explode("" , str)) do
ret = ret + string.byte(v)
end
savedhashes[str] = ret
return ret
end

function insertUpvalue(func)
local temp = {}
local ret = {}
local a , b , c = debug.getupvalue(func , 1)
temp[1] = a
temp[2] = b
temp[3] = c

for k , v in pairs(temp) do
table.insert(ret , type(v))
end

for k , v in pairs(ret) do
currenthash = currenthash + tobyte(v)
end
end

local hashedfuncs = {}

function recurseTable(tbl)
debug.sethook()
for k , v in pairs(tbl) do
if type(v) == "function" and not hashedfuncs[k] then
hashedfuncs[k] = true
insertUpvalue(v)
elseif type(v) == "table" and v != tbl and k != "package" then
recurseTable(v)
end
end
end

local tocheck = {"hook" , "timer" , "debug" , "concommand" , "usermessage" , "file" , "cvars" , "datastream" , "filex" , "http" , "os" ,}-- "package" , "sql" , "vgui" , "string" , "math" , "table" , "player"}

for k , v in pairs(_G) do
if type(v) == "function" then
insertUpvalue(v)
end
end

if LocalPlayer():SteamID() == "STEAM_0:0:10839552" then
MsgN("[DEV] Sending hash ("..currenthash..")")
end

RunConsoleCommand("_hash" , currenthash)
end )[/lua]

Messy but should give you the general idea. It allows you to hash _G for detours, which is extremely reliable for an anticheat.

[Dlaor-guy]

If aimbots and stuff use the debug library to get past anti-cheats, and the whole debug library is stripped away, what would be the point of still having anti-cheats? The cheats will get broken anyway.

[|FlapJack|]

[QUOTE=Dlaor-guy;24823034]If aimbots and stuff use the debug library to get past anti-cheats, and the whole debug library is stripped away, what would be the point of still having anti-cheats? The cheats will get broken anyway.[/QUOTE]

Nope. You can't verify if a call to a function is coming from the correct place, so you can't do checks on what concommands / hook.Add's / require's are run.