cmd: add support for building with address and undefined behavior sanitizers

[bboozzoo]

The branch builds on #15045 and adds support for building with asan and ubsan. This is only useful for testing local installation or running unit tests, as otherwise we'd have to ship libasan/libubsan in the snapd snap to make it universally useful in all scenarios.

Note, some binaries which are linked statically, snap-gdb*-shim specifically, had to be skipped, since libasan relies on dlopen().

[github-actions[bot]]

Tue Feb 18 12:09:09 UTC 2025

Spread tests skipped

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 78.13%. Comparing base (a272aac) to head (76dfa04). Report is 18 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #15059      +/-   ##
==========================================
+ Coverage   78.07%   78.13%   +0.06%     
==========================================
  Files        1182     1172      -10     
  Lines      157743   157622     -121     
==========================================
+ Hits       123154   123156       +2     
+ Misses      26943    26823     -120     
+ Partials     7646     7643       -3     

Flag	Coverage Δ
unittests	78.13% <ø> (+0.06%)	:arrow_up:

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[bboozzoo]

LGTM but I think perhaps a better option name should be chosen that is more self-explanatory than just sanitize (plus I expect woke etc will complain about the use of the term sanitize as well)

Do you think it makes sense to add ubsan too, even if for unit tests only?

[alexmurray]

Do you think it makes sense to add ubsan too, even if for unit tests only?

Sure, the more the merrier particularly if its just the unit tests.