fix(build): fix tests build warnings (fatal with -Werror)

[gnosek]

What type of PR is this?

Uncomment one (or more) /kind <> lines:

/kind bug

/kind cleanup

/kind design

/kind documentation

/kind failing-test

/kind feature

Any specific area of the project related to this PR?

Uncomment one (or more) /area <> lines:

/area API-version

/area build

/area CI

/area driver-kmod

/area driver-bpf

/area driver-modern-bpf

/area libscap-engine-bpf

/area libscap-engine-gvisor

/area libscap-engine-kmod

/area libscap-engine-modern-bpf

/area libscap-engine-nodriver

/area libscap-engine-noop

/area libscap-engine-source-plugin

/area libscap-engine-savefile

/area libscap

/area libpman

/area libsinsp

/area tests

/area proposals

Does this PR require a change in the driver versions?

/version driver-API-version-major

/version driver-API-version-minor

/version driver-API-version-patch

/version driver-SCHEMA-version-major

/version driver-SCHEMA-version-minor

/version driver-SCHEMA-version-patch

What this PR does / why we need it:

Every time I run a build with -Werror, I run into new and exciting issues. This is another round of shaving yaks just so I can get my own stuff done, so I took the liberty of adding -Werror to the CI driver_test builds.

Which issue(s) this PR fixes:

Fixes #2052

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

[gnosek]

cc @Andreagit97 @federico-sysdig

[github-actions]

Perf diff from master - unit tests

     5.78%     -0.81%  [.] sinsp_evt::get_type
     3.71%     +0.75%  [.] gzfile_read
     1.96%     -0.69%  [.] libsinsp::sinsp_suppress::process_event
     0.78%     -0.57%  [.] sinsp_container_manager::resolve_container
     0.78%     +0.56%  [.] sinsp_parser::parse_context_switch
     6.16%     -0.55%  [.] sinsp::next
     0.17%     +0.46%  [.] sinsp_parser::parse_open_openat_creat_exit
     0.94%     +0.46%  [.] std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_construct<char*>
     0.90%     +0.44%  [.] sinsp_evt::get_ts
     0.17%     +0.41%  [.] sinsp_container_info::sinsp_container_info

Heap diff from master - unit tests

peak heap memory consumption: 0B
peak RSS (including heaptrack overhead): 0B
total memory leaked: 0B

Heap diff from master - scap file

peak heap memory consumption: 0B
peak RSS (including heaptrack overhead): 0B
total memory leaked: 0B

Benchmarks diff from master

Comparing gbench_data.json to /root/actions-runner/_work/libs/libs/build/gbench_data.json
Benchmark                                                         Time             CPU      Time Old      Time New       CPU Old       CPU New
----------------------------------------------------------------------------------------------------------------------------------------------
BM_sinsp_split_mean                                            +0.0305         +0.0305           146           151           146           151
BM_sinsp_split_median                                          +0.0290         +0.0290           147           151           147           151
BM_sinsp_split_stddev                                          -0.3723         -0.3739             2             1             2             1
BM_sinsp_split_cv                                              -0.3908         -0.3924             0             0             0             0
BM_sinsp_concatenate_paths_relative_path_mean                  -0.0423         -0.0423            47            45            47            45
BM_sinsp_concatenate_paths_relative_path_median                -0.0415         -0.0415            47            45            47            45
BM_sinsp_concatenate_paths_relative_path_stddev                +1.7746         +1.7763             1             2             1             2
BM_sinsp_concatenate_paths_relative_path_cv                    +1.8971         +1.8988             0             0             0             0
BM_sinsp_concatenate_paths_empty_path_mean                     -0.0183         -0.0183            17            17            17            17
BM_sinsp_concatenate_paths_empty_path_median                   -0.0179         -0.0179            17            17            17            17
BM_sinsp_concatenate_paths_empty_path_stddev                   -0.2557         -0.2557             0             0             0             0
BM_sinsp_concatenate_paths_empty_path_cv                       -0.2419         -0.2418             0             0             0             0
BM_sinsp_concatenate_paths_absolute_path_mean                  -0.0199         -0.0199            49            48            49            48
BM_sinsp_concatenate_paths_absolute_path_median                -0.0455         -0.0455            49            46            49            46
BM_sinsp_concatenate_paths_absolute_path_stddev                +2.5983         +2.5967             1             3             1             3
BM_sinsp_concatenate_paths_absolute_path_cv                    +2.6715         +2.6698             0             0             0             0
BM_sinsp_split_container_image_mean                            +0.0181         +0.0181           344           350           344           350
BM_sinsp_split_container_image_median                          +0.0177         +0.0177           344           350           344           350
BM_sinsp_split_container_image_stddev                          +2.0834         +2.0816             1             2             1             2
BM_sinsp_split_container_image_cv                              +2.0286         +2.0267             0             0             0             0

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.57%. Comparing base (215db2d) to head (cae353d).
Report is 4 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2053   +/-   ##
=======================================
  Coverage   73.57%   73.57%           
=======================================
  Files         253      253           
  Lines       31860    31860           
  Branches     5640     5625   -15     
=======================================
  Hits        23442    23442           
+ Misses       8407     8387   -20     
- Partials       11       31   +20     

Flag	Coverage Δ
libsinsp	73.57% <ø> (ø)

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[Andreagit97]

Thank you very much for the fixes! I think we will need a rebase after this #2051 but i can take care of it if it's ok for you!

[gnosek]

Thank you very much for the fixes! I think we will need a rebase after this #2051 but i can take care of it if it's ok for you!

Whatever works for you :) I can rebase and clang-format no problem, but I will haunt you if that doesn't make the CI pass ;P

[FedeDP]

@gnosek can you rebase? Please make sure to follow https://github.com/falcosecurity/libs/blob/master/Contributing.md#enforce-coding-style- to properly auto-format the code.

[Andreagit97]

i will do it!

[Andreagit97]

Done

[Andreagit97]

/approve

[poiana]

LGTM label has been added.

Git tree hash: 6230dd57c4708461d792cc8b0a56dd8f21700fc2

[FedeDP]

/approve

[poiana]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Andreagit97, FedeDP, gnosek

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