process_dynptr_func
ret = process_dynptr_func(env, reg, argno, insn_idx, dynptr_arg_type,
err = process_dynptr_func(env, reg, argno_from_reg(regno), insn_idx, arg_type, &meta->ref_obj,
ret = process_dynptr_func(env, reg, argno, -1, arg->arg_type, &ref_obj, NULL);