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Static task memory allocation issue (FREERTOS 9.0.0)

Posted by aseris on March 27, 2017

There is a mistake in official example for static memory allocation for IDLE task and Timers task. http://www.freertos.org/a00110.html#configSUPPORTSTATICALLOCATION

Found this issue when task list becomes corrupted and I start figure outing what happened with debug plugin in IDE.

The issue is in lines static StaticTask_t xIdleTaskTCB; static StackTypet uxIdleTaskStack[ configMINIMALSTACK_SIZE ];

and

static StaticTask_t xTimerTaskTCB; static StackTypet uxTimerTaskStack[ configTIMERTASKSTACKDEPTH ];

the example proposes to allocate only 1/2/4 bytes of RAM to store TBC_t structure which is >100 bytes long

Example code "works" until allocated stack is enough big and stack overflow check algorithms did not turned on.

the correct code could be

staticTCB_t xIdleTaskTCB;

But, type xIdleTaskTCB is described inside tasks.c.


Static task memory allocation issue (FREERTOS 9.0.0)

Posted by aseris on March 27, 2017

Sorry, incorrectly read StaticTaskt as StackTypet . No issue.


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