Hello,
I m using Keil RTX on STM32F411. My IDE is Keil too.
I have a task to maintain and upgrade previous code where RTX is being used.
I need to debug a Stack Overflow (seen in System and Thread Viewer) and for that I need to identify the first overflow event to dig in that thread.
We can learn about hooks in freeRTOS here: https://www.youtube.com/watch?v=vBoP4Q6rf5g&list=PLnMKNibPkDnFeFV4eBfDQ9e5IrGL_dx1Q&index=20
The idea of having a callback when a Stack Overflow event happens is great.
Can some one give me a Tip, how to implement Hook in RTX or any approach to deal with Stack Overflow in RTX?
Another question is, I see a lot of Stack Overflows in " System and Thread Viewer" but would expect my System to fail totally, but instead the majority (not all) of Threads keep running.
I mean, this code shouldn't be running, one stack overflow would be enough to ruin the application. Is " System and Thread Viewer" info reliable?
br
> "...but this method seems not to be realible."
What is not reliable with this method? With stack watermarking enabled, the complete stack is filled with a value that is constantly checked in the debugger. A stack overflow might be detected too late, but you can even see post mortem that a stack overflow happened. I did not watch the ST video yet, but how would you detect a stack overflow other than during a thread switch or with a MPU?
So, I m using RTX on STMF411, compiler 5.06 and MDK5.24 from keil.
I have Stack Overflow Checking Enabled
I have Stack usage Watermark Enabled
When I say the debug info via "System and Thread Viewer" is not realible, I mean that when I have my threads stack set to 400Bytes, I have a max stack usage of ~90% and some overflows, when I change the stack to 1024Bytes, I see my max stack usage again arround 90%, so I dont understand what is going on. That's why I say "System and Thread Viewer" is not realible.
If you can shed some ligth, it would be great.
I need an example project where I can duplicate this issue. Anything else would be a wild guess. If you have an example please raise a support case and we will analyze this.
I can not give you any example code... But you can take a look onto this pictures and see what I mean.
I agree that these values do not make sense. I would really need an example project to duplicate and fix this.