[kaahos]

What Does This Do

Bumps java-profiler (ddprof) from 1.51.0 to 1.52.1 and updates the dependency lockfile.

Motivation

Noticeable changes

• Measure native allocator overhead instead of assuming a fixed factor in feat(nativemem): measure allocator overhead instead of assuming a blanket factor java-profiler#759.
• Improve stack frame attribution and AArch64 runtime stub unwinding in walkVM attribution addresses (PROF-15955) + one shared DWARF step (PROF-16059) java-profiler#813, Improve AArch64 runtime stub unwinding with precomputed per-stub unwind info java-profiler#816, and Fix aarch64 stub unwinding in I2C/C2I adapters; fix StubUnwindCpuTest slowness on debug builds java-profiler#842.
• Record the remote symbolication mode in JFR in fix: plug remote symbolication enum to JFR java-profiler#828.
• Add upstream reference-chain tracking and leak-signal detection, with liveness and recycled-tag identity fixes, in Reference-chain tracker and leak-signal engine java-profiler#797, Liveness epoch/urgency fixes, deferred chain invalidation, and debug JNI test seams java-profiler#798, and Reference chains: recycled leak-tag identity and Java integration tests java-profiler#800.
• Fix dictionary and call-trace table reclamation after drain timeouts, preserve string IDs across dictionary rotation, and correct live-trace preservation in Never reclaim dictionary storage after a timed-out drain java-profiler#839, Never free a call-trace table a put() may still hold after a drain timeout java-profiler#840, Close guard-scan and reused-buffer gaps in dictionary reclamation java-profiler#845, Keep one id per key across StringDictionary::rotate() java-profiler#857, and Fix live trace preservation deduplication by trace ID (PROF-16138) java-profiler#860.
• Fix duplicate and biased thread selection in wall-clock sampling, native socket hook timestamps, and continuation metadata lookup and frame alignment in Fix duplicate and biased thread picks in the wall-clock reservoir sampler java-profiler#844, Fix native socket hook timestamp sequencing (PROF-16151) java-profiler#862, and Fix continuation metadata lookup and frame alignment java-profiler#870.
• Add the upstream fjmethodid=lazy option for profiling HotSpot without jmethodIDs in Add fjmethodid=lazy: profile HotSpot without jmethodIDs java-profiler#868.

See the 1.52.0 release notes for the changes introduced since 1.51.0. Release notes for 1.52.1 are not published yet.

Additional Notes

Validation on macOS with JDK 21:

• Blocked: Lockfile regeneration and profiler tests: com.datadoghq:ddprof:1.52.1 is not available from the configured repositories yet. The lockfile version was updated manually.
• Blocked: spotlessApply failed to provision P2 dependencies. Neither changed file is a Spotless formatting target.
• Passed: git diff --check, version consistency checks, and agentic review (no actionable findings).

Contributor Checklist

• Format the title according to the contribution guidelines.
• Assign the type: and (comp: or inst:) labels in addition to any other useful labels.
• Avoid using linking keywords when referencing an issue; use solves instead, and assign the PR milestone to the issue.
• Update CODEOWNERS on source file addition, migration, or deletion.
• Update public documentation with any new configuration flags or behaviors.
• Once approved, use merge queue to merge the PR.

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	🔄 Running since 2026-10-24T09:36:41.577081Z	e124166	Draft marked ready
🔒 Security Review	🔄 Running since 2026-10-24T09:36:41.578919Z	e124166	Draft marked ready

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[datadog-datadog-prod-us1-2]

🎯 Code Coverage (details)
• Patch Coverage: 100.00%
• Overall Coverage: 59.47% (+0.00%)

_{This comment will be updated automatically if new data arrives.
🔗 Commit SHA: a1f89f0 | Docs | Give us feedback!}

[datadog-datadog-prod-us1-2]

More details

Static inspection identified no compatibility blocker for ddprof 1.52.0. Native loading and runtime behavior remain untested.

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[dd-octo-sts]

🟡 Java Benchmark SLOs — Performance SLO warning (near threshold)

Suite	Status
Startup	🟡 warning

SLO thresholds are defined here based on automatically generated metrics. A warning is raised when results are within 5% of the threshold.

PR vs. master results

Scenario	Candidate	master	Δ (95% CI of mean)
startup:insecure-bank:iast:Agent	13.97 s	13.95 s	[-0.5%; +0.8%] (no difference)
startup:insecure-bank:tracing:Agent	12.89 s	12.93 s	[-1.0%; +0.2%] (no difference)
startup:petclinic:appsec:Agent	17.75 s	17.56 s	[+0.1%; +2.0%] (maybe worse)
startup:petclinic:iast:Agent	17.55 s	17.70 s	[-1.6%; -0.1%] (maybe better)
startup:petclinic:profiling:Agent	17.51 s	17.29 s	[+0.0%; +2.6%] (maybe worse)
startup:petclinic:sca:Agent	17.84 s	17.67 s	[-0.0%; +2.0%] (no difference)
startup:petclinic:tracing:Agent	16.65 s	16.79 s	[-1.6%; +0.0%] (no difference)

Commit: a1f89f03 · CI Pipeline · Benchmarking Platform UI

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Load and DaCapo benchmarks can be triggered manually in the GitLab pipeline. Results will appear in the Benchmarking Platform UI after completion.

[dd-octo-sts]

/merge

[gh-worker-devflow-routing-ef8351]

View all feedbacks in Devflow UI.

2026-10-26 18:26:35 UTC ℹ️ Start processing command /merge
Use /merge -c to cancel this operation!

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2026-10-26 18:26:39 UTC ℹ️ MergeQueue: pull request added to the queue

The expected merge time in master is approximately 1h (p90).

Use /merge -c to cancel this operation!

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⏳ Building merge commit 23ff207f42 in pipeline 4182873678949435267...