How to use watchdog with standby mode ?

I am devoloping a low-power motion detector device using the STM32L071 mcu.
The PIR sensor wakes up the system through wake-up pin, and after completing the RF packet transmission, the system goes back to sleep. In other words, I have a system that continuously switches between standby and run modes.

How should I implement the watchdog in such a system ?

I don't want the watchdog to keep counting while the MCU is in standby mode. I only it to run during run mode.


My code like this (bare metal):

int main(void)
{

 /* USER CODE BEGIN 1 */
 config_getresetflags();
 /* USER CODE END 1 */

 /* MCU Configuration--------------------------------------------------------*/

 /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
 HAL_Init();

 /* USER CODE BEGIN Init */

 /* USER CODE END Init */

 /* Configure the system clock */
 SystemClock_Config();

 /* USER CODE BEGIN SysInit */
 ws_register_sensor_driver(&ws_door_driver);
 ws_init_mx();
 ws_wkp_src();
 ws_init_selection();
 ws_pvd();
#if WS_MX_INIT_FUSE //closed part
 /* USER CODE END SysInit */

 /* Initialize all configured peripherals */
 MX_GPIO_Init();
 MX_DMA_Init();
 MX_SPI2_Init();
 MX_USART1_UART_Init();
 MX_TIM7_Init();
 MX_TIM6_Init();
 MX_RTC_Init();
 MX_ADC_Init();
 /* USER CODE BEGIN 2 */
#endif
 control.tick = HAL_GetTick();
 /* USER CODE END 2 */

 /* Infinite loop */
 /* USER CODE BEGIN WHILE */
 while (1)
 {
	loop(); // my tasks
 /* USER CODE END WHILE */

 /* USER CODE BEGIN 3 */
 }
 /* USER CODE END 3 */
}