MSP432-RTOS: how to switch TCBs for a stack backtrace

David Alessio

Part Number: MSP432-RTOS
Other Parts Discussed in Thread: SYSBIOS

Hello,

I have a few tasks that sometimes fail (forever) to wake up. If I break execution, I see the idle task's stack. How do I switch TCBs to do a backtrace on another task?

Latest and greatest tool versions.

Regards,

-david

over 4 years ago

0 Chester Gillon over 4 years ago

Guru 92251 points

Does [FAQ] How to Trick the CCS debugger into providing a blocked TI-RTOS (SYS/BIOS) task call stack on Cortex-M devices help?

0 David Alessio over 4 years ago in reply to Chester Gillon

Prodigy 160 points

That's what I want, but I'm afraid this "Trick" doesn't work well enough. The ROV Detailed Task view shows Task bms2 blocked semaphore 0x20004268. The Semaphore view shows semaphore 0x20004268 is unlabeled (it's not one of mine). The "backtrace" in the top left pane is useless (it's nonsensical). The PC points to the "return(key);" statement of "ti_sysbios_hal_Hwi_disable()" which is interesting but not really informative.

What I need to know is who "owns" semaphore 0x20004268 and why am I (bms2) blocked on it?

A proper stack backtrace would show that call history and final blocking call.

Any suggestions?

0 David Alessio over 4 years ago in reply to David Alessio

Prodigy 160 points

Arm-based microcontrollers

Arm-based microcontrollers forum

MSP432-RTOS: how to switch TCBs for a stack backtrace