Add LockSupport TaskBlock profiling instrumentation

[kaahos]

What Does This Do

Add TaskBlock profiling instrumentation for LockSupport.park/unpark, including blocker and unblocking span attribution where available.

Motivation

LockSupport.park is widely used by executors, queues, schedulers, and virtual-thread internals. Capturing these park intervals as TaskBlock events makes parked time attributable to spans and easier to separate from active execution in wall-clock profiles.

Additional Notes

• Stacked on Add wallclock TaskBlock profiler support #11544
• Add DD_TRACE_LOCK_SUPPORT_ENABLED

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Jira ticket: [PROJ-IDENT]

[datadog-official]

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⚠️ Warnings

🚦 17 Pipeline jobs failed

DataDog/apm-reliability/dd-trace-java | config-inversion-linter     

See error

Undocumented environment variable 'profiling.taskblock.unblocking.enabled' found. Please add it to 'supported-configurations.json'.

DataDog/apm-reliability/dd-trace-java | jetty-app.arm64.DOC: [public.ecr.aws/docker/library/almalinux:8.10, linux/arm64, 21.0.7-zulu]     

See error

2 failed tests. Assertion Error: No traces found for request OWGRKKDRTNZABSSSCZAAVJDCWMRLVQMLWPEZ in test_install_supported_runtime and assert len(telemetry_autoinject_data) >= 1 failed in test_telemetry.

DataDog/apm-reliability/dd-trace-java | jetty-app.arm64.DOC: [public.ecr.aws/docker/library/almalinux:9.4, linux/arm64, 17.0.15-zulu]     

See error

2 failed tests. AssertionError: No traces found for request NRQENHSJDDIJXGOJEMJCZQVUVRQKXRPJMBQN in test_install_supported_runtime and assert len(telemetry_autoinject_data) >= 1 failed in test_telemetry.

View all 17 failed jobs.

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