Gmod Lua Unlocker

Website: https://glu.cldmk.ly/

Super cool feature: Can be used offline after visiting once!

Garry's Mod strips powerful debugging functions from Lua to prevent abuse. This project undoes that, allowing previously removed functions to be used again.

Restored functions

1. debug.setupvalue
2. debug.setlocal
3. debug.upvalueid
4. debug.upvaluejoin

Usage:

1. Go to the unlocker's page.
2. Drag and drop your lua_shared.dll file to 'unlock' it.
3. Backup your original lua_shared.dll file in (Garry's Mod Install)\garrysmod\bin\ (or \bin\win64 for 64 bit).
4. Rename the unlocked file to lua_shared.dll and place in same location as original.
5. Enjoy forbidden functions!

How it works

The website finds the following facepunch code which is responsible for removing the forbidden functions and skips over it to ignore facepunch's modification:

lua_getfield(L, LUA_GLOBALSINDEX, "debug");

lua_pushnil(L);
lua_setfield(L, -2, "setlocal");

lua_pushnil(L);
lua_setfield(L, -2, "setupvalue");

lua_pushnil(L);
lua_setfield(L, -2, "upvalueid");

lua_pushnil(L);
lua_setfield(L, -2, "upvaluejoin");

lua_settop(L, -2);

Note:

Some servers check for presence of these functions, make sure to hide them to avoid being banned.

local debug_setupvalue = debug.setupvalue
debug.setupvalue = nil


# Now use debug_setupvalue instead of debug.setupvalue.