| Technique | Effect on Decompiler | |-----------|----------------------| | Stripping debug info ( luac -s ) | Loss of local variable names – annoying but not fatal. | | Control flow flattening | Produces irreducible CFG; many decompilers crash or output garbled logic. | | Custom VM/opcodes | Standard decompilers fail entirely; requires reverse engineering the custom loader. | | String encryption (XOR, AES) | Output shows decryption calls instead of literals. | | Dead code & opaque predicates | Decompiler may output nonsense or infinite loops. | | Using luac from modified Lua versions (e.g., LuaJIT, LuaU) | Bytecode incompatible; decompiler must be updated. |
local function factorial(n) if n <= 1 then return 1 else return n * factorial(n - 1) end end print(factorial(5)) luac decompiler
-- Source: print("Hello")
Local variable names are often discarded during compilation. Your decompiler might replace them with placeholders like l_1_0 or var1 . | | String encryption (XOR, AES) | Output
Specifically designed for LuaJIT bytecode, which is structurally different from standard Lua bytecode. | local function factorial(n) if n <= 1
Several Lua decompilers are available, each with its strengths and weaknesses: