DataDog/dd-trace-dotnet v2.5.1 on GitHub

Summary

From now on, Datadog Continuous Profiler is released within the MSI on Windows. It is deactivated by default. Set the environment variable DD_PROFILING_ENABLED=1 to enable it.
You can now instrument methods through configuration thanks to the DD_TRACE_METHODS variable. Public documentation change is in progress (Install 2.6.0 instead if you want to test this feature as we have fixed one issue when using different versions between Custom and Automatic instrumentation).
Finally, the release also brings support for B3 and W3C headers (#2536).

[CI App] - Agentless Writer (#2402)
[CIApp] - Add support for XUnit LogsDirectSubmission (#2531)
[CI-App] Adds test.bundle tag (#2561)
[CIApp] - Protect foreground thread with a timeout to avoid blocking process shutdown (#2564)
[CIApp] - Fixes some agentless tags (#2575)
[CIApp] - Small improvements. (#2584)
[CIApp] - Add agentless url configuration key (#2589)

Remove some CI appsec tests since blocking is not supported yet (#2505)
Increase WAF timeout in tests (#2512)
[Appsec] Update rules file (#2516)
[AppSec] Support postfix time format for WAF timeout (#2519)
[AppSec] small fix: don't log a warning if no waf timeout has been specified (#2576)

Reverse to protobuf 3.7.0 to avoid unexpected new dependency (System.Memory.dll) (#2513)
[Profiler] Implement new pipeline to generate .pprof via libddprof (#2524)
[Profiler] Backport feature: send heartbeat metric on each export (#2565)
[Profiler] Prevent additional/useless copies in logging wrappers (#2585)
[Tracer] Implement Code Hotspot feature (#2587)
Fix warnings (#2518)
[Profiler] Use managed code to generate pprof file (#2540)

Allow sharing runtime ids between Tracer and Profiler (and other) (#2474)
Ensure the native loader works with 3rd party dispatcher (e.g.: Contrast) (#2478)
Add better handling of nullable type chaining (#2424)
Shared Loader - Add support for more rewriting points (#2487)
Add proper spdlog-based logging to NativeLoader (#2489)
[Cleanup] Move shared classes/files to shared and ensure Profiler, Tracer and Native Loader use them (#2493)
[Shared Loader] - Fix variable name (#2504)
[All] Use custom std::filesystem implementation for Linux (#2527)
Add basic PDB reading capability (and vendor-in dnlib) (#2592)
Update joint MSI with original .NET Tracer configuration (#2597)
Remove manual call to logger shutdown (#2559)

Make all integration tests utilize Native Loader instead of loading Datadog.Trace.ClrProfiler.Native directly (#2358)
Improve error handling in CLI (#2463)
Increase Redis test matrix (#2472)
Ignore common test failures (#2477)
Fixes for the build related to hotfix releases (#2511)
Add artifacts for the standalone tool (#2514)
Run profiler pipeline on PRs to hotfix branches (#2522)
Allow disabling samples on Alpine, and always running only major versions (#2534)
Reduce number of integration tests built and run on master (#2547)
Add --overwrite true to Azure upload (#2556)
Use Azure VMSS hosted runners (#2560)
Allow skipping builds for some packages on ARM64 (#2562)
Update test packages and fix MongoDb sample (#2563)
Fix Yaml in .gitlab-ci.yml (#2566)
Use CustomTestFramework in runner integration tests (#2590)
Strengthen GraphQL span expectation to address test flakiness (#2593)
CLI - Check for suspicious registry keys in WOW6432Node (#2595)
Fix typo in docker-compose.yml that is causing an error to appear in CI (#2475)
[Profiler] Add profiler in the automatic version bump process (#2530)
[Profiler] Fix build_windows_profiler AzOp step (#2541)
[Tracer] Use the native loader for Windows integration tests (#2549)
[Profiler] Activate checks in smoke tests for the new pipeline (#2552)
Run system tests over UDS (#2571)
Improve docs on Linux builds with Docker on Windows (#2523)