new(sinsp): implement new PPME_SYSCALL_OPEN event

[Andreagit97]

What type of PR is this?

/kind feature

Any specific area of the project related to this PR?

/area libscap

/area libsinsp

/area tests

Does this PR require a change in the driver versions?

No

What this PR does / why we need it:

This is the first real PR part of the sys_enter/sys_exit initiative #2068.
The suggestion is to review it commit by commit.
The main scope of the PR is to add the new PPME_SYSCALL_OPEN event with its tests in sinsp unit test framework. Apart from this there are some cleanups on enter/exit logic. The idea is to try to divide the new code from the old one where meaningful, using something like if(is_new_event_version()).
I left some todos that we probably need to address at the end of the work, we can probably cleanup and simplify many flows but at the moment i left them as they are to avoid disruption.

Let me know what you think about this :)

Which issue(s) this PR fixes:

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

NONE

[github-actions]

Please double check driver/API_VERSION file. See versioning.

/hold

[github-actions]

Perf diff from master - unit tests

     3.21%     +1.13%  [.] sinsp_parser::process_event
     2.27%     -1.02%  [.] scap_event_decode_params
     3.62%     -0.96%  [.] sinsp_thread_manager::find_thread
     2.22%     -0.84%  [.] sinsp::fetch_next_event
     5.48%     +0.82%  [.] sinsp_evt::get_type
     0.67%     +0.68%  [.] sinsp_evt::get_direction
     3.15%     +0.60%  [.] sinsp_evt::load_params
     1.02%     -0.58%  [.] 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
     9.87%     +0.41%  [.] sinsp_parser::reset
     1.03%     -0.38%  [.] sinsp_split[abi:cxx11]

Heap diff from master - unit tests

peak heap memory consumption: -1.66K
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                                            -0.0355         -0.0355           146           141           146           141
BM_sinsp_split_median                                          -0.0366         -0.0366           146           141           146           141
BM_sinsp_split_stddev                                          -0.0889         -0.0890             1             0             1             0
BM_sinsp_split_cv                                              -0.0555         -0.0555             0             0             0             0
BM_sinsp_concatenate_paths_relative_path_mean                  +0.0174         +0.0174            60            61            60            61
BM_sinsp_concatenate_paths_relative_path_median                +0.0170         +0.0170            60            61            60            61
BM_sinsp_concatenate_paths_relative_path_stddev                -0.0374         -0.0365             0             0             0             0
BM_sinsp_concatenate_paths_relative_path_cv                    -0.0539         -0.0530             0             0             0             0
BM_sinsp_concatenate_paths_empty_path_mean                     -0.0132         -0.0132            25            25            25            25
BM_sinsp_concatenate_paths_empty_path_median                   -0.0144         -0.0143            25            25            25            25
BM_sinsp_concatenate_paths_empty_path_stddev                   +0.3353         +0.3343             0             0             0             0
BM_sinsp_concatenate_paths_empty_path_cv                       +0.3531         +0.3522             0             0             0             0
BM_sinsp_concatenate_paths_absolute_path_mean                  +0.0196         +0.0196            62            63            62            63
BM_sinsp_concatenate_paths_absolute_path_median                +0.0116         +0.0116            62            63            62            63
BM_sinsp_concatenate_paths_absolute_path_stddev                -0.7266         -0.7266             1             0             1             0
BM_sinsp_concatenate_paths_absolute_path_cv                    -0.7319         -0.7318             0             0             0             0
BM_sinsp_split_container_image_mean                            +0.0149         +0.0149           373           378           373           378
BM_sinsp_split_container_image_median                          +0.0121         +0.0121           372           377           372           377
BM_sinsp_split_container_image_stddev                          +0.6167         +0.6164             3             4             3             4
BM_sinsp_split_container_image_cv                              +0.5929         +0.5927             0             0             0             0

[codecov]

Codecov Report

Attention: Patch coverage is 83.41232% with 35 lines in your changes missing coverage. Please review.

Project coverage is 75.00%. Comparing base (facfcc3) to head (40d9eb6).

Files with missing lines	Patch %	Lines
userspace/libsinsp/event.cpp	20.00%	16 Missing ⚠️
...ce/libsinsp/test/parsers/new_events/parse_open.cpp	92.50%	6 Missing ⚠️
userspace/libsinsp/sinsp_filtercheck_event.cpp	70.58%	5 Missing ⚠️
userspace/libsinsp/event.h	69.23%	4 Missing ⚠️
userspace/libsinsp/parsers.cpp	92.30%	2 Missing ⚠️
userspace/libsinsp/filter_compare.cpp	66.66%	1 Missing ⚠️
userspace/libsinsp/sinsp_filtercheck.cpp	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2153      +/-   ##
==========================================
+ Coverage   74.77%   75.00%   +0.22%     
==========================================
  Files         254      256       +2     
  Lines       33505    33636     +131     
  Branches     5748     5741       -7     
==========================================
+ Hits        25053    25228     +175     
+ Misses       8452     8408      -44     

Flag	Coverage Δ
libsinsp	75.00% <83.41%> (+0.22%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[FedeDP]

/approve

[poiana]

LGTM label has been added.

Git tree hash: 1cdfe973e48e7bf6fe5fd2621c6214b2c340eeeb

[poiana]

[APPROVALNOTIFIER] This PR is APPROVED

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

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[poiana]

New changes are detected. LGTM label has been removed.

[Andreagit97]

Just rebased to fix the CI