crimes.py

# derived from https://github.com/DavidBuchanan314/unsafe-python

nogc = set()

def sizeof(obj):
    return type(obj).__sizeof__(obj)

def get_aligned_tuple_and_bytes(prefix):
    its_per_size = 4
    tuples = []
    byteses = []
    for size in range(8, 64)[::-1]:
        template = range(size)
        suffix = b"A" * (size * 8 - len(prefix))
        for _ in range(its_per_size):
            tuples.append(tuple(template))
            byteses.append(prefix + suffix)

    bestdist = 9999999999
    besttuple = None
    bestbytes = None
    pairs = [(t, b) for t in tuples for b in byteses]
    for t, b in pairs:
        dist = id(b) - id(t)
        if dist > 0 and dist < bestdist:
            bestdist = dist
            besttuple = t
            bestbytes = b

    return (besttuple, bestbytes)

def fakeobj(addr):
    ptr = addr.to_bytes(8, 'little')

    nogc.add(ptr)

    const_tuple, ref = get_aligned_tuple_and_bytes(ptr)

    nogc.add(ref)

    tuple_start = id(const_tuple) + sizeof(())
    ref_addr = id(ref) + sizeof(b"") - 1

    offset = (ref_addr - tuple_start) // 8

    loader = eval("lambda: list(%s) if None else %s" % (",".join(map(str, range(1, offset))), offset)).__code__
    newcode = loader.replace(co_consts=const_tuple)

    makemagic = (lambda: None).__class__(newcode, {})

    return makemagic()

def write_int(dst, src):
    fake_bytearray = (1).to_bytes(8, 'little') + id(bytearray).to_bytes(8, 'little') + ((1<<63)-1).to_bytes(8, 'little') + (0).to_bytes(8, 'little') * 4
    mem = fakeobj(id(fake_bytearray) + sizeof(b"") - 1)

    for idx in range(sizeof(src)):
        mem[id(dst) + idx] = mem[id(src) + idx]

write_int(1, 2)

a = 1
b = 2
print(a + b)