Bump ddprof to 1.51.0

[zhengyu123]

What Does This Do

Bump ddprof to 1.51.0

Motivation

Bug fixes, feature enhancements and stability improvements.

Additional Notes

What's Changed

• fix: omit source_sha in retry mode by @jbachorik in #764
• Fix release.sh script by @zhengyu123 in #776
• fix(nativemem): refresh NM_NATIVE_SYMBOLS where the tables change by @rkennke in #753
• feat(nativemem): emit post-serialization counters so flush cost is visible by @rkennke in #754
• refactor(profiling): Signal handler boilerplate by @yaronguro-datadog in #756
• Possible out-of-bounds Context read by @zhengyu123 in #774
• refactor(sampling): replace std::random_device with the existing xorshift64 by @rkennke in #794
• ci: move the shipped binaries to AlmaLinux 8, get the test images off EOL Debian by @rkennke in #790
• Avoid UBSan wrap in ElfSection vaddr arithmetic by @jbachorik in #795
• Model crashNow's intentional crash as a trap under scan-build by @jbachorik in #804
• ci: count integration configurations with no result as failures by @rkennke in #792
• ci: quarantine flaky tests against a ticket instead of retrying past them by @rkennke in #777
• JFR event types and emission for reference chains by @jbachorik in #796
• Fix: PROF-15934 - native stack walker return-address attribution by @rkennke in #786
• Restore ucontext on faulted paths by @zhengyu123 in #781
• Add performance counters/metrics for samplers by @zhengyu123 in #811
• Fix SanityCheckTest OOM on JDK 8 and a false crash in flake_report by @rkennke in #815
• ci: restore EL7 stresstest coverage, add nightly EL7 functional tests by @rkennke in #805
• ci: wire the EL7 functional job into #777's quarantine machinery by @rkennke in #810
• Purge unsupported platforms by @zhengyu123 in #818
• fix(test): stop -O3 tail-calling away the return-address trampolines by @rkennke in #819
• ci: run the C++ unit tests in the release configuration by @rkennke in #821
• fix: address argument parsing silent drops by @kaahos in #817
• Possible UAF of otel_thread_ctx_v1 by @zhengyu123 in #820

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 close, fix, or any linking keywords when referencing an issue
  Use solves instead, and assign the PR milestone to the issue
• Update the CODEOWNERS file 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

Jira ticket: [PROJ-IDENT]

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[datadog-prod-us1-6]

The ddprof declaration advances to 1.51.0 while the module’s committed Gradle lockfile still records 1.50.0, leaving the dependency bump’s reproducible resolution state incomplete.

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[dd-octo-sts]

🟢 Java Benchmark SLOs — All performance SLOs passed

Suite	Status
Startup	🟢 pass

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	14.02 s	14.05 s	[-1.1%; +0.6%] (no difference)
startup:insecure-bank:tracing:Agent	13.05 s	13.05 s	[-1.0%; +0.9%] (no difference)
startup:petclinic:appsec:Agent	17.05 s	16.94 s	[-0.3%; +1.6%] (no difference)
startup:petclinic:iast:Agent	16.93 s	17.01 s	[-1.3%; +0.4%] (no difference)
startup:petclinic:profiling:Agent	16.87 s	16.56 s	[+0.5%; +3.2%] (maybe worse)
startup:petclinic:sca:Agent	16.97 s	16.81 s	[-0.1%; +2.0%] (no difference)
startup:petclinic:tracing:Agent	16.14 s	16.16 s	[-1.3%; +1.0%] (no difference)

Commit: c01429df · 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]

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2026-09-28 20:10:48 UTC ℹ️ Start processing command /merge

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2026-09-28 20:10:52 UTC ℹ️ MergeQueue: pull request added to the queue

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

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2026-09-28 22:11:36 UTC ❌ MergeQueue: The build pipeline has timeout

The merge request has been interrupted because the build 837310742796624878 took longer than expected. The current limit for the base branch 'master' is 120 minutes.

[dd-octo-sts]

/merge

[gh-worker-devflow-routing-ef8351]

View all feedbacks in Devflow UI.

2026-09-28 23:52:12 UTC ℹ️ Start processing command /merge

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2026-09-28 23:52:17 UTC ℹ️ MergeQueue: pull request added to the queue

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

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2026-09-29 01:07:16 UTC ℹ️ MergeQueue: This merge request was merged