Make use of the sidecar thread safe

[iamluc]

Description

The recreation of the sidecar transport in case of error (closed socket, sidecar crash, ...) was not thread safe.
This PR should fix that.

NOTE: because this PR needs a change in libdatadog (DataDog/libdatadog#440), the generated header files also contain some changes of #2639

Reviewer checklist

• Test coverage seems ok.
• Appropriate labels assigned.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 83.87097% with 5 lines in your changes are missing coverage. Please review.

Project coverage is 66.77%. Comparing base (1aaebd8) to head (10b9acf).
Report is 3 commits behind head on master.

Additional details and impacted files

@@              Coverage Diff              @@
##             master    #2671       +/-   ##
=============================================
- Coverage     77.72%   66.77%   -10.95%     
  Complexity     2212     2212               
=============================================
  Files           225      199       -26     
  Lines         26109    21953     -4156     
  Branches        988        0      -988     
=============================================
- Hits          20292    14659     -5633     
- Misses         5291     7294     +2003     
+ Partials        526        0      -526     

Flag	Coverage Δ
appsec-extension	?
tracer-extension	78.54% <83.87%> (-0.02%)	⬇️
tracer-php	50.44% <ø> (-29.86%)	⬇️

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

Files	Coverage Δ
ext/sidecar.c	90.32% <83.87%> (+7.56%)	⬆️

... and 59 files with indirect coverage changes

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[pr-commenter]

Benchmarks

Benchmark execution time: 2024-05-22 10:23:05

Comparing candidate commit 10b9acf in PR branch luc/sidecar-thread-safety with baseline commit 1aaebd8 in branch master.

Found 14 performance improvements and 2 performance regressions! Performance is the same for 162 metrics, 0 unstable metrics.

scenario:ComposerTelemetryBench/benchTelemetryParsing

• 🟥 execution_time [+2.503µs; +4.497µs] or [+4.422%; +7.946%]

scenario:EmptyFileBench/benchEmptyFileBaseline

• 🟩 execution_time [-369.502µs; -232.558µs] or [-13.339%; -8.395%]

scenario:EmptyFileBench/benchEmptyFileBaseline-opcache

• 🟩 execution_time [-435.457µs; -298.943µs] or [-15.016%; -10.308%]

scenario:EmptyFileBench/benchEmptyFileOverhead

• 🟩 execution_time [-532.619µs; -358.301µs] or [-14.805%; -9.959%]

scenario:EmptyFileBench/benchEmptyFileOverhead-opcache

• 🟩 execution_time [-627.622µs; -492.798µs] or [-16.844%; -13.226%]

scenario:HookBench/benchHookOverheadInstallHookOnFunction

• 🟥 execution_time [+20.089µs; +37.867µs] or [+2.475%; +4.666%]

scenario:LaravelBench/benchLaravelBaseline

• 🟩 execution_time [-354.663µs; -200.017µs] or [-12.213%; -6.888%]

scenario:LaravelBench/benchLaravelBaseline-opcache

• 🟩 execution_time [-483.706µs; -335.034µs] or [-15.836%; -10.969%]

scenario:LaravelBench/benchLaravelOverhead

• 🟩 execution_time [-559.448µs; -375.372µs] or [-14.769%; -9.909%]

scenario:LaravelBench/benchLaravelOverhead-opcache

• 🟩 execution_time [-591.415µs; -416.825µs] or [-15.261%; -10.756%]

scenario:SymfonyBench/benchSymfonyBaseline

• 🟩 execution_time [-515.681µs; -444.659µs] or [-8.115%; -6.997%]

scenario:SymfonyBench/benchSymfonyBaseline-opcache

• 🟩 execution_time [-527.111µs; -478.689µs] or [-8.151%; -7.402%]

scenario:SymfonyBench/benchSymfonyOverhead

• 🟩 execution_time [-947.724µs; -892.476µs] or [-11.944%; -11.248%]

scenario:SymfonyBench/benchSymfonyOverhead-opcache

• 🟩 execution_time [-924.632µs; -840.408µs] or [-11.519%; -10.470%]

scenario:WordPressBench/benchWordPressOverhead

• 🟩 execution_time [-10.230ms; -8.324ms] or [-4.654%; -3.787%]

scenario:WordPressBench/benchWordPressOverhead-opcache

• 🟩 execution_time [-9.471ms; -7.807ms] or [-4.280%; -3.528%]

[iamluc]

Superseded by #2672