Monitoring stack usage

Vladimir Romanov

Hello!

How I can monitor Stack usage for osless build? As I undestand I can fill stack with FF or some another pattern and check not modified part. Maybe exist some standard library?

over 9 years ago

0 Charles Tsai over 9 years ago

TI__Guru**** 191486 points

Hi Vladimir,

What you can also do is to use the MPU (memory protection unit) for your stack. Not sure which device you are using. Please refer to the Cortex-R4F/R5F TRM on the usage of MPU if you are using Hercules devices. If you go beyond what you reserve for stacks then it will trip a MPU error and the CPU will take the abort exception.

0 Anthony F. Seely over 9 years ago in reply to Charles Tsai

TI__Guru 68920 points

You probably do not need to fill the stack anyway as initiailzing the RAM in hardware will fill it with 0's.

Charles suggestion on MPU is the best for runtime.

Offline, there is a different way to analyze at a function level with the 'armofd' utility:

from

0 Chester Gillon over 9 years ago in reply to Anthony F. Seely

Guru 92251 points

Anthony F. Seely said:
Offline, there is a different way to analyze at a function level with the 'armofd' utility

There is also the call_graph program in the cg_xml utility which calculates the worst case stack usage by processing the output from the armofd utility - see Finding out static stack usage

0 Charles Tsai over 9 years ago in reply to Chester Gillon

TI__Guru**** 191486 points

Chester,
Thanks for sharing the tips with the community.

0 Vladimir Romanov over 9 years ago

Intellectual 940 points

Thanks to all for this information.

0 Vladimir Romanov over 9 years ago

Intellectual 940 points

This simple function that return free user stack size

#define STACK_HEAD ((const uint32_t*)0x08000000)
static uint16_t get_stack_free () {
    const uint32_t* p = STACK_HEAD;
    while (*p == 0) {
        p++;
    }
    return (uint16_t) ((p - STACK_HEAD) * 4);
}

Arm-based microcontrollers

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Monitoring stack usage