Finding out where a task has stalled in DSP/BIOS

howy

I periodically have problem in DSP BIOS where a task of mine has stalled and I cannot find out where.

For example if a loop like this never exits...

while (BuffERNotFull() )

TSK_sleep(1);

I have no way of finding out that it is stuck in this particular loop. I find my self placing breakpoints everywhere in attempt to guess where the task is stuck.

Is there a way I can see the state of a task so I can see where the program counter is pointing?

Alternatively it would be nice if I could break on the code that is called just before the task is switched to so I can trace into the task to find out what it is waiting for.

-howy

over 12 years ago

0 Alan DeMars over 12 years ago

TI__Mastermind 30830 points

Howy,

Using the detailed Task module ROV view you can see the detailed information about the state of each task.

The last column titled "blockedOn" will tell which type of object a task in the 'Blocked' mode is blocked on.

For Task's that are waiting for a Task_sleep() timeout, it will show "Task_sleep(ticks)" where 'ticks' is the tick count remaining before expiration.

Alan

0 howy over 12 years ago in reply to Alan DeMars

Intellectual 460 points

But how do I find out which one of the possibly 30 different TSK_sleep() loops its sitting in at the moment? I have more than 1Mbyte of actual CODE section in this program so when something gets blocked it can be impossible to find out where it is blocked.

-howy

0 Alan DeMars over 12 years ago in reply to howy

TI__Mastermind 30830 points

Howy,

Sadly, we currently do not have a per-task stack back trace mechanism. This idea has been discussed before and is tentatively (not definitely!) scheduled to be supported in a future CCS 6.0 build.

Also, I realized this morning that you are using DSP/BIOS and my advice regarding the Task module ROV view applies only to SYS/BIOS applications.

Alan

0 howy over 12 years ago in reply to Alan DeMars

Intellectual 460 points

OK,

I think I might make a new sleep() function that can trigger a breakpoint function when I set a global variable that indicates that any sleep() for a particular task should execute a break point routine when called.

-howy

0 Alan DeMars over 12 years ago in reply to howy

TI__Mastermind 30830 points

Thats a very good idea.

Alan

Processors

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Finding out where a task has stalled in DSP/BIOS