Stack overflow detection (method 1 and 2) in FreeRTOS - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to enable stack overflow checking method 1 in FreeRTOSConfig.h.

FreeRTOS

#define configCHECK_FOR_STACK_OVERFLOW [1]

Drag options to blanks, or click blank then click option'

A0

B3

C2

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Setting the value to 0 disables checking.

Using 2 enables method 2, not method 1.

Setting configCHECK_FOR_STACK_OVERFLOW to 1 enables method 1 stack overflow checking in FreeRTOS.

2fill in blank

medium

Complete the function prototype for the stack overflow hook used with method 1 or 2.

FreeRTOS

void vApplicationStackOverflowHook([1]);

Drag options to blanks, or click blank then click option'

Avoid

BTaskHandle_t xTask, char *pcTaskName

CTaskHandle_t xTask

Dint xTask

Attempts:

3 left

💡 Hint

Common Mistakes

Using only one parameter.

Using incorrect parameter types.

The hook function receives the task handle and the task name as parameters.

3fill in blank

hard

Fix the error in the stack overflow hook implementation to correctly handle method 2 detection.

FreeRTOS

void vApplicationStackOverflowHook(TaskHandle_t xTask, char *pcTaskName) {
    [1];
    for( ;; );
}

Drag options to blanks, or click blank then click option'

AtaskDISABLE_INTERRUPTS()

BvTaskSuspendAll()

CvTaskDelete(xTask)

DportYIELD()

Attempts:

3 left

💡 Hint

Common Mistakes

Calling vTaskDelete inside the hook.

Not disabling interrupts before infinite loop.

Disabling interrupts immediately prevents further damage after detecting stack overflow.

4fill in blank

hard

Fill both blanks to configure FreeRTOS for stack overflow detection method 2 and enable the hook.

FreeRTOS

#define configCHECK_FOR_STACK_OVERFLOW [1]
#define configUSE_STACK_OVERFLOW_HOOK [2]

Drag options to blanks, or click blank then click option'

A2

B1

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Setting the hook macro to 0 disables the hook.

Using method 1 value instead of 2.

Method 2 is enabled by setting configCHECK_FOR_STACK_OVERFLOW to 2 and enabling the hook with configUSE_STACK_OVERFLOW_HOOK set to 1.

5fill in blank

hard

Fill all three blanks to implement a stack overflow hook that disables interrupts, logs the task name, and halts the system.

FreeRTOS

void vApplicationStackOverflowHook(TaskHandle_t xTask, char *pcTaskName) {
    [1];
    printf("Stack overflow in task: %s\n", [2]);
    for( [3] );
}

Drag options to blanks, or click blank then click option'

AtaskDISABLE_INTERRUPTS()

BpcTaskName

C;;

DvTaskSuspendAll()

Attempts:

3 left

💡 Hint

Common Mistakes

Not disabling interrupts before printing.

Using incorrect loop syntax.

The hook disables interrupts, prints the task name, and enters an infinite loop to halt the system.