Function __alloc_strings_array

qiling/os/windows/dlls/msvcrt.py:25–54

Allocate and populate an array of strings and return its address.

(ql: Qiling, items: Sequence[str], *, wide: bool)

    pass

def __alloc_strings_array(ql: Qiling, items: Sequence[str], *, wide: bool) -> int:
    '''Allocate and populate an array of strings and return its address.
    '''

    enc = 'utf-16le' if wide else 'utf-8'

    nitems = len(items)

    # allocate room for pointers to items and a trailing null pointer
    p_array = ql.os.heap.alloc((nitems + 1) * ql.arch.pointersize)

    # encode all arguments into bytes
    items_bytes = [f'{item}\x00'.encode(enc) for item in items]

    # allocate room for the items
    p_items_bytes = ql.os.heap.alloc(sum(len(a) for a in items_bytes))

    for i, item in enumerate(items_bytes):
        # write argument data
        ql.mem.write(p_items_bytes, item)

        # write pointer to argument data into the argv array
        ql.mem.write_ptr(p_array + (i * ql.arch.pointersize), p_items_bytes)

        p_items_bytes += len(item)

    # write trailing null pointer
    ql.mem.write_ptr(p_array + (nitems * ql.arch.pointersize), 0)

    return p_array

def __getmainargs(ql: Qiling, params, wide: bool) -> int:
    argc = len(ql.argv)