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

[tmav]

Hello,

is there any way to access the Stack and Heap Start/End memory addresses from the zephyr code?

I have found the __INITIAL_SP definition that gives the Stack start in cmsis_gcc_m.h.

In the same file there is the __StackLimit, but when I include it in my code, I get an undefined error.

undefined reference to `__StackLimit'

In Keil there where the following definitions in arm_startup_nrf52.s:

__initial_sp

Stack_Size

__heap_base

Heap_Size

Are there something similar in Zephyr?

Best Regards

[Amanda Hsieh]

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.

[tmav]

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

[Amanda Hsieh]

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.

[tmav]

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

[Amanda Hsieh]

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

[tmav]

Thanks you so much.

This is what I was looking for.