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CCS: xPendingReadyList is crashed in FreeRTOS on RM57L843ZWT

user3721557
Prodigy 60 points

Other Parts Discussed in Thread: HALCOGEN

Tool/software: Code Composer Studio

xPendingReadyList is crashed in FreeRTOS on RM57L843ZWT

 

The FreeRTOS is generatd by HALCoGEN 4.6.1 and so its version is 8.2.0.

 

The system has been running for a while (several minutes) and then crashed. The location crashed is in the function xTaskResumeAll (os_task.c)

                while( listLIST_IS_EMPTY( &xPendingReadyList ) == pdFALSE )

                {

                    pxTCB = ( TCB_t * ) listGET_OWNER_OF_HEAD_ENTRY( ( &xPendingReadyList ) );

                    ( void ) uxListRemove( &( pxTCB->xEventListItem ) );

The cause is that when the number of the item in xPendingReadyList is ZERO (because pxList->xListEnd.pxNext == (ListItem_t *)&(pxList->xListEnd)), the variable uxNumberOfItems is still ONE, but the FreeRTOS check if list is empty by uxNumberOfItems,

#define listLIST_IS_EMPTY( pxList )         ( ( BaseType_t ) ( ( pxList )->uxNumberOfItems == ( UBaseType_t ) 0 ) ) 

So in the next loop the pxTCB is an invalid pointer.

 Who can explain why the list xPendingReadyList is crashed.

Thanks.

 

Zhiqiang