How can I access the Stack and Heap Start/End memory addresses from the Zephyr code?

RE: How can I access the Stack and Heap Start/End memory addresses from the Zephyr code?

tmav — Thu, 13 Nov 2025 07:52:14 GMT

Thanks you so much.

This is what I was looking for.

RE: How can I access the Stack and Heap Start/End memory addresses from the Zephyr code?

Amanda Hsieh — Wed, 12 Nov 2025 16:52:15 GMT

You can take a look at this post. The Low Level Heap Allocator API and this sys_heap sample also might help.

RE: How can I access the Stack and Heap Start/End memory addresses from the Zephyr code?

tmav — Wed, 12 Nov 2025 09:53:59 GMT

Many thanks for all info.

Is there any function to get the stack/heap available size in my app?

I would like to log these statistics in case of a HardFault and help me to trace back the error.

Regards

Thanasis

RE: How can I access the Stack and Heap Start/End memory addresses from the Zephyr code?

Amanda Hsieh — Tue, 11 Nov 2025 18:39:04 GMT

Hi,

You can use VS Code/ Thread Viewer to debug with stack usage. You can take a look at How to work with the Thread Viewer and this DevAcademy course Debugging in nRF Connect for VS Code.

-Amanda H.

RE: How can I access the Stack and Heap Start/End memory addresses from the Zephyr code?

tmav — Tue, 11 Nov 2025 16:40:42 GMT

Hi,

with Keil & nRF52832, my app was calculating the Stack & Heap statistics for debug reasons.

Now, I am trying to port my nRF52 code to nRF54L15 and the Bare metal SDK and I would like to have something similar.

Regards

RE: How can I access the Stack and Heap Start/End memory addresses from the Zephyr code?

Amanda Hsieh — Tue, 11 Nov 2025 16:26:47 GMT

Hi,

Could you elaborate more on what you want to achieve?

In the nRF5 SDK, there was typically only one stack, but there is one main stack for handling interrupts in addition to one stack for each thread in Zephy. For the heap, it will also depend on how the heap(s) are "allocated" in a given app.

Regards,
Amanda H.