Application stack overflow during SoftDevice execution

RE: Application stack overflow during SoftDevice execution

swlnk — Thu, 31 Dec 2020 21:32:55 GMT

Hi Matt! This was from a couple of years ago so I don't remember all of the details, but I think the key point here (that I didn't realize when I wrote the question) is that the soft device and the application are sharing the same runtime stack. The "memory resource requirements" page in the soft device spec gives guidance on how much call stack usage you can expect from the soft device. You then need to look at your application and consider whether you have set the boundary to be large enough to handle the soft device "worst case" plus your application "worst case". In my application, the stack size was too small to handle this, and at times it would overflow causing corruption of my static variables. Simply increasing the stack size resolved the issue. My guess is that you are seeing something similar.

RE: Application stack overflow during SoftDevice execution

matt_wilson — Tue, 29 Dec 2020 21:17:31 GMT

I am experiencing very similar issues where on connection my application static variables are being over written from what I'm guessing is stack overflow. How did you go about resolving this issue and do you have any advice on this?

- Matt

RE: Application stack overflow during SoftDevice execution

swlnk — Mon, 06 May 2019 17:22:41 GMT

That makes sense. Thank you!

RE: Application stack overflow during SoftDevice execution

Turbo J — Sat, 04 May 2019 13:36:32 GMT

[quote userid="69046" url="~/f/nordic-q-a/46917/application-stack-overflow-during-softdevice-execution"]I have used IAR's stack usage analysis features[/quote]

These cannot see how much stack the softdevice uses, because it is not compiled with your applicartion.

But the SD internal stack usage is documented (in the softdevice specifications) to be 2KB. With your on apps <=2KB stack usage, I would set up 4KB or 0x1000 bytes for stack.