cleanup(sinsp): handle path too long in a better way

[Andreagit97]

What type of PR is this?

/kind cleanup

Any specific area of the project related to this PR?

/area libsinsp

Does this PR require a change in the driver versions?
No

What this PR does / why we need it:

Today in case of path is too long we return /PATH_TOO_LONG. This means:

• fd_directory = "/"
• fd_filename = "PATH_TOO_LONG"

The directory is definitely wrong and misleading as a workaround I propose something like this /DIR_TOO_LONG/FILENAME_TOO_LONG, so:

• fd_directory = "/DIR_TOO_LONG"
• fd_filename = "FILENAME_TOO_LONG"

We probably need to find something better but at least we remove the wrong dir

Which issue(s) this PR fixes:

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

[poiana]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Andreagit97

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[Andreagit97]

not sure if 0.19.0 or 0.20.0, it should be quite safe

[github-actions]

Perf diff from master - unit tests

     3.23%     +0.71%  [.] sinsp_parser::process_event
     3.64%     -0.69%  [.] sinsp_thread_manager::find_thread
     1.02%     -0.56%  [.] std::_Hashtable<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, libsinsp::state::dynamic_struct::field_info>, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, libsinsp::state::dynamic_struct::field_info> >, std::__detail::_Select1st, std::equal_to<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::hash<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::__detail::_Mod_range_hashing, std::__detail::_Default_ranged_hash, std::__detail::_Prime_rehash_policy, std::__detail::_Hashtable_traits<true, false, true> >::_M_find_before_node
     1.03%     -0.48%  [.] sinsp_split[abi:cxx11]
     1.44%     -0.46%  [.] 0x00000000000ea364
     1.04%     -0.42%  [.] std::_Hashtable<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::__detail::_Identity, std::equal_to<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::hash<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::__detail::_Mod_range_hashing, std::__detail::_Default_ranged_hash, std::__detail::_Prime_rehash_policy, std::__detail::_Hashtable_traits<true, true, true> >::find
     3.90%     -0.40%  [.] gzfile_read
     2.29%     +0.40%  [.] scap_event_decode_params
     9.93%     +0.39%  [.] sinsp_parser::reset
     1.13%     -0.37%  [.] sinsp_evt::get_param

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                                            -0.0130         -0.0130           146           144           146           144
BM_sinsp_split_median                                          -0.0136         -0.0136           146           144           146           144
BM_sinsp_split_stddev                                          +0.3044         +0.3049             1             1             1             1
BM_sinsp_split_cv                                              +0.3216         +0.3221             0             0             0             0
BM_sinsp_concatenate_paths_relative_path_mean                  +0.0403         +0.0403            60            62            60            62
BM_sinsp_concatenate_paths_relative_path_median                +0.0391         +0.0391            60            62            60            62
BM_sinsp_concatenate_paths_relative_path_stddev                +1.4329         +1.4343             0             0             0             0
BM_sinsp_concatenate_paths_relative_path_cv                    +1.3386         +1.3400             0             0             0             0
BM_sinsp_concatenate_paths_empty_path_mean                     +0.0008         +0.0008            25            25            25            25
BM_sinsp_concatenate_paths_empty_path_median                   -0.0017         -0.0016            25            25            25            25
BM_sinsp_concatenate_paths_empty_path_stddev                   +0.8447         +0.8429             0             0             0             0
BM_sinsp_concatenate_paths_empty_path_cv                       +0.8433         +0.8414             0             0             0             0
BM_sinsp_concatenate_paths_absolute_path_mean                  +0.0108         +0.0108            62            62            62            62
BM_sinsp_concatenate_paths_absolute_path_median                +0.0284         +0.0284            62            64            62            64
BM_sinsp_concatenate_paths_absolute_path_stddev                +0.8204         +0.8208             1             3             1             3
BM_sinsp_concatenate_paths_absolute_path_cv                    +0.8009         +0.8013             0             0             0             0
BM_sinsp_split_container_image_mean                            +0.0335         +0.0335           373           385           373           385
BM_sinsp_split_container_image_median                          +0.0332         +0.0332           372           385           372           385
BM_sinsp_split_container_image_stddev                          -0.4150         -0.4149             3             2             3             2
BM_sinsp_split_container_image_cv                              -0.4340         -0.4338             0             0             0             0

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.77%. Comparing base (facfcc3) to head (b9b7243).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2160   +/-   ##
=======================================
  Coverage   74.77%   74.77%           
=======================================
  Files         254      254           
  Lines       33505    33511    +6     
  Branches     5748     5748           
=======================================
+ Hits        25053    25058    +5     
- Misses       8452     8453    +1     

Flag	Coverage Δ
libsinsp	74.77% <100.00%> (+<0.01%)	⬆️

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