Create a tool for finding out stack sizes automatically.

[nashif]

Reported by Benjamin Walsh:

As a user of Zephyr, I would like to have the sizes of the thread stacks to be computed automatically instead of going by guess work and/or manually auditing the stacks.

(Imported from Jira ZEP-1061)

[nashif]

by Johan Hedberg:

There are some challenges with creating something like this: variable length arrays and recursive function calls. Any thoughts on how to deal with those?

[nashif]

by Andrew Boie:

This is quite obviously a topic of general interest in computer science so I'm going to survey existing work on this before making any specific proposals.

[nashif]

by Anas Nashif:

Interesting pointer:

https://mcuoneclipse.com/2015/08/21/gnu-static-stack-usage-analysis/

[nashif]

by Vinayak Kariappa Chettimada:

Internally in nordic we use python scripts to parse the map (lst) files (KEIL toolchain supports callgraph generation) and construct a custom call tree/graph in python, they are part of regression tests for SoftDevice build. The results are tuned with manual review and addition of exceptions to call paths that are not possible by design etc. These are then compared with runtime numbers from thousands of regression system tests on a daily/weekly basis.

[nashif]

by Andrew Boie:

Robert Beatty recommend we move this from 1.8 to 'Future'. Need to focus on MMU support for 1.8.

[nashif]

by Robert Beatty:

Andrew Boie , OK. Pushing to {{1.9}}

[nashif]

by Andrew Boie:

I think we already have something that does this -- see scripts/checkstack.pl. It doesn't seem to work correctly though, all I get for output is:

apboie@apboie-mobl1:/projects/zephyr/samples/hello_world master /projects/zephyr
$ objdump -d outdir/qemu_x86/zephyr.elf | /projects/zephyr/scripts/checkstack.pl 
0x0010003d __csSet [zephyr.elf]:            2048