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feat(stats)!: add agent version gating to client-side stats#2040

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feat(stats)!: add agent version gating to client-side stats#2040
VianneyRuhlmann wants to merge 5 commits into
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vianney/update-css-gating

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@VianneyRuhlmann
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@VianneyRuhlmann VianneyRuhlmann commented May 26, 2026

What does this PR do?

Parse the agent version as semver and check it when enabling client-side stats. Also check for the stats endpoint.

Motivation

According to spec client-side stats should only be enabled when agent version is higher than. 7.65 and the stats endpoint is available.

Additional Notes

Anything else we should know when reviewing?

How to test the change?

Describe here in detail how the change can be validated.

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datadog-official Bot commented May 26, 2026

Tests

🎉 All green!

🧪 All tests passed
❄️ No new flaky tests detected

🎯 Code Coverage (details)
Patch Coverage: 99.02%
Overall Coverage: 72.91% (+0.05%)

This comment will be updated automatically if new data arrives.
🔗 Commit SHA: f0568c8 | Docs | Datadog PR Page | Give us feedback!

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📚 Documentation Check Results

⚠️ 1051 documentation warning(s) found

📦 libdd-data-pipeline - 1051 warning(s)


Updated: 2026-05-26 18:32:57 UTC | Commit: ca208f8 | missing-docs job results

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github-actions Bot commented May 26, 2026

Clippy Allow Annotation Report

Comparing clippy allow annotations between branches:

  • Base Branch: origin/main
  • PR Branch: origin/vianney/update-css-gating

Summary by Rule

Rule Base Branch PR Branch Change
unwrap_used 2 2 No change (0%)
Total 2 2 No change (0%)

Annotation Counts by File

File Base Branch PR Branch Change
libdd-data-pipeline/src/trace_exporter/mod.rs 2 2 No change (0%)

Annotation Stats by Crate

Crate Base Branch PR Branch Change
clippy-annotation-reporter 5 5 No change (0%)
datadog-ffe-ffi 1 1 No change (0%)
datadog-ipc 21 21 No change (0%)
datadog-live-debugger 6 6 No change (0%)
datadog-live-debugger-ffi 10 10 No change (0%)
datadog-profiling-replayer 4 4 No change (0%)
datadog-remote-config 3 3 No change (0%)
datadog-sidecar 57 57 No change (0%)
libdd-common 13 13 No change (0%)
libdd-common-ffi 12 12 No change (0%)
libdd-data-pipeline 5 5 No change (0%)
libdd-ddsketch 2 2 No change (0%)
libdd-dogstatsd-client 1 1 No change (0%)
libdd-profiling 13 13 No change (0%)
libdd-telemetry 20 20 No change (0%)
libdd-tinybytes 4 4 No change (0%)
libdd-trace-normalization 2 2 No change (0%)
libdd-trace-obfuscation 3 3 No change (0%)
libdd-trace-stats 1 1 No change (0%)
libdd-trace-utils 13 15 ⚠️ +2 (+15.4%)
Total 196 198 ⚠️ +2 (+1.0%)

About This Report

This report tracks Clippy allow annotations for specific rules, showing how they've changed in this PR. Decreasing the number of these annotations generally improves code quality.

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🔒 Cargo Deny Results

⚠️ 5 issue(s) found, showing only errors (advisories, bans, sources)

📦 libdd-data-pipeline - 5 error(s)

Show output
error[unsound]: Rand is unsound with a custom logger using `rand::rng()`
    ┌─ /home/runner/work/libdatadog/libdatadog/Cargo.lock:214:1
    │
214 │ rand 0.8.5 registry+https://github.com/rust-lang/crates.io-index
    │ ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ unsound advisory detected
    │
    ├ ID: RUSTSEC-2026-0097
    ├ Advisory: https://rustsec.org/advisories/RUSTSEC-2026-0097
    ├ It has been reported (by @lopopolo) that the `rand` library is [unsound](https://rust-lang.github.io/unsafe-code-guidelines/glossary.html#soundness-of-code--of-a-library) (i.e. that safe code using the public API can cause Undefined Behaviour) when all the following conditions are met:
      
      - The `log` and `thread_rng` features are enabled
      - A [custom logger](https://docs.rs/log/latest/log/#implementing-a-logger) is defined
      - The custom logger accesses `rand::rng()` (previously `rand::thread_rng()`) and calls any `TryRng` (previously `RngCore`) methods on `ThreadRng`
      - The `ThreadRng` (attempts to) reseed while called from the custom logger (this happens every 64 kB of generated data)
      - Trace-level logging is enabled or warn-level logging is enabled and the random source (the `getrandom` crate) is unable to provide a new seed
      
      `TryRng` (previously `RngCore`) methods for `ThreadRng` use `unsafe` code to cast `*mut BlockRng<ReseedingCore>` to `&mut BlockRng<ReseedingCore>`. When all the above conditions are met this results in an aliased mutable reference, violating the Stacked Borrows rules. Miri is able to detect this violation in sample code. Since construction of [aliased mutable references is Undefined Behaviour](https://doc.rust-lang.org/stable/nomicon/references.html), the behaviour of optimized builds is hard to predict.
    ├ Announcement: https://github.com/rust-random/rand/pull/1763
    ├ Solution: Upgrade to >=0.10.1 OR <0.10.0, >=0.9.3 OR <0.9.0, >=0.8.6 (try `cargo update -p rand`)
    ├ rand v0.8.5
      ├── libdd-common v4.1.0
      │   ├── libdd-capabilities-impl v2.0.0
      │   │   ├── libdd-data-pipeline v5.0.0
      │   │   ├── libdd-shared-runtime v1.0.0
      │   │   │   ├── libdd-data-pipeline v5.0.0 (*)
      │   │   │   ├── libdd-telemetry v5.0.0
      │   │   │   │   └── libdd-data-pipeline v5.0.0 (*)
      │   │   │   └── libdd-trace-stats v4.0.0
      │   │   │       └── libdd-data-pipeline v5.0.0 (*)
      │   │   ├── libdd-trace-stats v4.0.0 (*)
      │   │   └── libdd-trace-utils v5.0.0
      │   │       ├── libdd-data-pipeline v5.0.0 (*)
      │   │       ├── libdd-trace-obfuscation v3.1.0
      │   │       │   └── libdd-trace-stats v4.0.0 (*)
      │   │       ├── libdd-trace-stats v4.0.0 (*)
      │   │       └── (dev) libdd-trace-utils v5.0.0 (*)
      │   ├── libdd-data-pipeline v5.0.0 (*)
      │   ├── libdd-dogstatsd-client v3.0.0
      │   │   └── libdd-data-pipeline v5.0.0 (*)
      │   ├── libdd-shared-runtime v1.0.0 (*)
      │   ├── libdd-telemetry v5.0.0 (*)
      │   ├── libdd-trace-obfuscation v3.1.0 (*)
      │   ├── libdd-trace-stats v4.0.0 (*)
      │   └── libdd-trace-utils v5.0.0 (*)
      ├── (dev) libdd-data-pipeline v5.0.0 (*)
      ├── (dev) libdd-trace-normalization v2.0.0
      │   └── libdd-trace-utils v5.0.0 (*)
      ├── (dev) libdd-trace-stats v4.0.0 (*)
      ├── libdd-trace-utils v5.0.0 (*)
      └── proptest v1.5.0
          └── (dev) libdd-tinybytes v1.1.1
              ├── libdd-data-pipeline v5.0.0 (*)
              ├── (dev) libdd-tinybytes v1.1.1 (*)
              └── libdd-trace-utils v5.0.0 (*)

error[vulnerability]: Name constraints for URI names were incorrectly accepted
    ┌─ /home/runner/work/libdatadog/libdatadog/Cargo.lock:238:1
    │
238 │ rustls-webpki 0.103.10 registry+https://github.com/rust-lang/crates.io-index
    │ ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ security vulnerability detected
    │
    ├ ID: RUSTSEC-2026-0098
    ├ Advisory: https://rustsec.org/advisories/RUSTSEC-2026-0098
    ├ Name constraints for URI names were ignored and therefore accepted.
      
      Note this library does not provide an API for asserting URI names, and URI name constraints are otherwise not implemented.  URI name constraints are now rejected unconditionally.
      
      Since name constraints are restrictions on otherwise properly-issued certificates, this bug is reachable only after signature verification and requires misissuance to exploit.
      
      This vulnerability is identified as [GHSA-965h-392x-2mh5](https://github.com/rustls/webpki/security/advisories/GHSA-965h-392x-2mh5). Thank you to @1seal for the report.
    ├ Solution: Upgrade to >=0.103.12, <0.104.0-alpha.1 OR >=0.104.0-alpha.6 (try `cargo update -p rustls-webpki`)
    ├ rustls-webpki v0.103.10
      └── rustls v0.23.37
          ├── hyper-rustls v0.27.7
          │   └── libdd-common v4.1.0
          │       ├── libdd-capabilities-impl v2.0.0
          │       │   ├── libdd-data-pipeline v5.0.0
          │       │   ├── libdd-shared-runtime v1.0.0
          │       │   │   ├── libdd-data-pipeline v5.0.0 (*)
          │       │   │   ├── libdd-telemetry v5.0.0
          │       │   │   │   └── libdd-data-pipeline v5.0.0 (*)
          │       │   │   └── libdd-trace-stats v4.0.0
          │       │   │       └── libdd-data-pipeline v5.0.0 (*)
          │       │   ├── libdd-trace-stats v4.0.0 (*)
          │       │   └── libdd-trace-utils v5.0.0
          │       │       ├── libdd-data-pipeline v5.0.0 (*)
          │       │       ├── libdd-trace-obfuscation v3.1.0
          │       │       │   └── libdd-trace-stats v4.0.0 (*)
          │       │       ├── libdd-trace-stats v4.0.0 (*)
          │       │       └── (dev) libdd-trace-utils v5.0.0 (*)
          │       ├── libdd-data-pipeline v5.0.0 (*)
          │       ├── libdd-dogstatsd-client v3.0.0
          │       │   └── libdd-data-pipeline v5.0.0 (*)
          │       ├── libdd-shared-runtime v1.0.0 (*)
          │       ├── libdd-telemetry v5.0.0 (*)
          │       ├── libdd-trace-obfuscation v3.1.0 (*)
          │       ├── libdd-trace-stats v4.0.0 (*)
          │       └── libdd-trace-utils v5.0.0 (*)
          ├── libdd-common v4.1.0 (*)
          └── tokio-rustls v0.26.0
              ├── hyper-rustls v0.27.7 (*)
              └── libdd-common v4.1.0 (*)

error[vulnerability]: Name constraints were accepted for certificates asserting a wildcard name
    ┌─ /home/runner/work/libdatadog/libdatadog/Cargo.lock:238:1
    │
238 │ rustls-webpki 0.103.10 registry+https://github.com/rust-lang/crates.io-index
    │ ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ security vulnerability detected
    │
    ├ ID: RUSTSEC-2026-0099
    ├ Advisory: https://rustsec.org/advisories/RUSTSEC-2026-0099
    ├ Permitted subtree name constraints for DNS names were accepted for certificates asserting a wildcard name.
      
      This was incorrect because, given a name constraint of `accept.example.com`, `*.example.com` could feasibly allow a name of `reject.example.com` which is outside the constraint.
      This is very similar to [CVE-2025-61727](https://go.dev/issue/76442).
      
      Since name constraints are restrictions on otherwise properly-issued certificates, this bug is reachable only after signature verification and requires misissuance to exploit.
      
      This vulnerability is identified as [GHSA-xgp8-3hg3-c2mh](https://github.com/rustls/webpki/security/advisories/GHSA-xgp8-3hg3-c2mh). Thank you to @1seal for the report.
    ├ Solution: Upgrade to >=0.103.12, <0.104.0-alpha.1 OR >=0.104.0-alpha.6 (try `cargo update -p rustls-webpki`)
    ├ rustls-webpki v0.103.10
      └── rustls v0.23.37
          ├── hyper-rustls v0.27.7
          │   └── libdd-common v4.1.0
          │       ├── libdd-capabilities-impl v2.0.0
          │       │   ├── libdd-data-pipeline v5.0.0
          │       │   ├── libdd-shared-runtime v1.0.0
          │       │   │   ├── libdd-data-pipeline v5.0.0 (*)
          │       │   │   ├── libdd-telemetry v5.0.0
          │       │   │   │   └── libdd-data-pipeline v5.0.0 (*)
          │       │   │   └── libdd-trace-stats v4.0.0
          │       │   │       └── libdd-data-pipeline v5.0.0 (*)
          │       │   ├── libdd-trace-stats v4.0.0 (*)
          │       │   └── libdd-trace-utils v5.0.0
          │       │       ├── libdd-data-pipeline v5.0.0 (*)
          │       │       ├── libdd-trace-obfuscation v3.1.0
          │       │       │   └── libdd-trace-stats v4.0.0 (*)
          │       │       ├── libdd-trace-stats v4.0.0 (*)
          │       │       └── (dev) libdd-trace-utils v5.0.0 (*)
          │       ├── libdd-data-pipeline v5.0.0 (*)
          │       ├── libdd-dogstatsd-client v3.0.0
          │       │   └── libdd-data-pipeline v5.0.0 (*)
          │       ├── libdd-shared-runtime v1.0.0 (*)
          │       ├── libdd-telemetry v5.0.0 (*)
          │       ├── libdd-trace-obfuscation v3.1.0 (*)
          │       ├── libdd-trace-stats v4.0.0 (*)
          │       └── libdd-trace-utils v5.0.0 (*)
          ├── libdd-common v4.1.0 (*)
          └── tokio-rustls v0.26.0
              ├── hyper-rustls v0.27.7 (*)
              └── libdd-common v4.1.0 (*)

error[vulnerability]: Reachable panic in certificate revocation list parsing
    ┌─ /home/runner/work/libdatadog/libdatadog/Cargo.lock:238:1
    │
238 │ rustls-webpki 0.103.10 registry+https://github.com/rust-lang/crates.io-index
    │ ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ security vulnerability detected
    │
    ├ ID: RUSTSEC-2026-0104
    ├ Advisory: https://rustsec.org/advisories/RUSTSEC-2026-0104
    ├ A panic was reachable when parsing certificate revocation lists via [`BorrowedCertRevocationList::from_der`]
      or [`OwnedCertRevocationList::from_der`].  This was the result of mishandling a syntactically valid empty
      `BIT STRING` appearing in the `onlySomeReasons` element of a `IssuingDistributionPoint` CRL extension.
      
      This panic is reachable prior to a CRL's signature being verified.
      
      Applications that do not use CRLs are not affected.
      
      Thank you to @tynus3 for the report.
    ├ Solution: Upgrade to >=0.103.13, <0.104.0-alpha.1 OR >=0.104.0-alpha.7 (try `cargo update -p rustls-webpki`)
    ├ rustls-webpki v0.103.10
      └── rustls v0.23.37
          ├── hyper-rustls v0.27.7
          │   └── libdd-common v4.1.0
          │       ├── libdd-capabilities-impl v2.0.0
          │       │   ├── libdd-data-pipeline v5.0.0
          │       │   ├── libdd-shared-runtime v1.0.0
          │       │   │   ├── libdd-data-pipeline v5.0.0 (*)
          │       │   │   ├── libdd-telemetry v5.0.0
          │       │   │   │   └── libdd-data-pipeline v5.0.0 (*)
          │       │   │   └── libdd-trace-stats v4.0.0
          │       │   │       └── libdd-data-pipeline v5.0.0 (*)
          │       │   ├── libdd-trace-stats v4.0.0 (*)
          │       │   └── libdd-trace-utils v5.0.0
          │       │       ├── libdd-data-pipeline v5.0.0 (*)
          │       │       ├── libdd-trace-obfuscation v3.1.0
          │       │       │   └── libdd-trace-stats v4.0.0 (*)
          │       │       ├── libdd-trace-stats v4.0.0 (*)
          │       │       └── (dev) libdd-trace-utils v5.0.0 (*)
          │       ├── libdd-data-pipeline v5.0.0 (*)
          │       ├── libdd-dogstatsd-client v3.0.0
          │       │   └── libdd-data-pipeline v5.0.0 (*)
          │       ├── libdd-shared-runtime v1.0.0 (*)
          │       ├── libdd-telemetry v5.0.0 (*)
          │       ├── libdd-trace-obfuscation v3.1.0 (*)
          │       ├── libdd-trace-stats v4.0.0 (*)
          │       └── libdd-trace-utils v5.0.0 (*)
          ├── libdd-common v4.1.0 (*)
          └── tokio-rustls v0.26.0
              ├── hyper-rustls v0.27.7 (*)
              └── libdd-common v4.1.0 (*)

error[vulnerability]: Denial of Service via Stack Exhaustion
    ┌─ /home/runner/work/libdatadog/libdatadog/Cargo.lock:278:1
    │
278 │ time 0.3.41 registry+https://github.com/rust-lang/crates.io-index
    │ ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ security vulnerability detected
    │
    ├ ID: RUSTSEC-2026-0009
    ├ Advisory: https://rustsec.org/advisories/RUSTSEC-2026-0009
    ├ ## Impact
      
      When user-provided input is provided to any type that parses with the RFC 2822 format, a denial of
      service attack via stack exhaustion is possible. The attack relies on formally deprecated and
      rarely-used features that are part of the RFC 2822 format used in a malicious manner. Ordinary,
      non-malicious input will never encounter this scenario.
      
      ## Patches
      
      A limit to the depth of recursion was added in v0.3.47. From this version, an error will be returned
      rather than exhausting the stack.
      
      ## Workarounds
      
      Limiting the length of user input is the simplest way to avoid stack exhaustion, as the amount of
      the stack consumed would be at most a factor of the length of the input.
    ├ Announcement: https://github.com/time-rs/time/blob/main/CHANGELOG.md#0347-2026-02-05
    ├ Solution: Upgrade to >=0.3.47 (try `cargo update -p time`)
    ├ time v0.3.41
      └── tracing-appender v0.2.3
          └── libdd-log v1.0.0
              └── (dev) libdd-data-pipeline v5.0.0

advisories FAILED, bans ok, sources ok

Updated: 2026-05-26 18:34:41 UTC | Commit: ca208f8 | dependency-check job results

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codecov-commenter commented May 26, 2026

Codecov Report

❌ Patch coverage is 99.01961% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 72.90%. Comparing base (321ffb6) to head (f0568c8).
⚠️ Report is 17 commits behind head on main.

Additional details and impacted files
@@           Coverage Diff            @@
##             main    #2040    +/-   ##
========================================
  Coverage   72.90%   72.90%            
========================================
  Files         457      459     +2     
  Lines       75768    76309   +541     
========================================
+ Hits        55238    55634   +396     
- Misses      20530    20675   +145     
Components Coverage Δ
libdd-crashtracker 65.20% <ø> (ø)
libdd-crashtracker-ffi 36.82% <ø> (ø)
libdd-alloc 98.77% <ø> (ø)
libdd-data-pipeline 86.07% <99.01%> (-0.62%) ⬇️
libdd-data-pipeline-ffi 75.70% <ø> (-2.93%) ⬇️
libdd-common 79.89% <ø> (+0.07%) ⬆️
libdd-common-ffi 74.41% <ø> (ø)
libdd-telemetry 73.37% <ø> (ø)
libdd-telemetry-ffi 31.36% <ø> (ø)
libdd-dogstatsd-client 82.64% <ø> (ø)
datadog-ipc 76.07% <ø> (-0.15%) ⬇️
libdd-profiling 81.69% <ø> (+0.01%) ⬆️
libdd-profiling-ffi 64.79% <ø> (ø)
libdd-sampling 97.46% <ø> (ø)
datadog-sidecar 29.19% <ø> (-0.16%) ⬇️
datdog-sidecar-ffi 10.17% <ø> (-0.76%) ⬇️
spawn-worker 48.86% <ø> (ø)
libdd-tinybytes 93.80% <ø> (+0.64%) ⬆️
libdd-trace-normalization 81.71% <ø> (ø)
libdd-trace-obfuscation 87.30% <ø> (ø)
libdd-trace-protobuf 68.25% <ø> (ø)
libdd-trace-utils 88.90% <ø> (+0.03%) ⬆️
libdd-tracer-flare 86.88% <ø> (ø)
libdd-log 74.83% <ø> (ø)
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@VianneyRuhlmann VianneyRuhlmann changed the title wip feat(stats)!: add agent version gating to client-side stats May 27, 2026
@VianneyRuhlmann VianneyRuhlmann marked this pull request as ready for review May 27, 2026 12:33
@VianneyRuhlmann VianneyRuhlmann requested a review from a team as a code owner May 27, 2026 12:33
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.info
.version
.as_ref()
.is_some_and(|v| (v.major, v.minor, v.patch) >= MIN_STATS_AGENT_VERSION)
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P2 Badge Reject prerelease versions below the minimum

When the agent reports a prerelease such as 7.65.0-rc.1, the parser preserves that suffix in metadata, but this comparison only checks (major, minor, patch), so the prerelease is treated as satisfying the >= 7.65.0 gate. Under semver precedence 7.65.0-rc.1 is lower than 7.65.0, so in environments running RC/dev agents that also advertise /v0.6/stats, client-side stats can be enabled before the minimum supported stable agent version.

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@Eldolfin
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/merge

@gh-worker-devflow-routing-ef8351
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gh-worker-devflow-routing-ef8351 Bot commented May 27, 2026

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2026-05-27 13:35:32 UTC ℹ️ Start processing command /merge


2026-05-27 13:35:41 UTC ℹ️ MergeQueue: waiting for PR to be ready

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2026-05-27 13:35:57 UTC ⚠️ MergeQueue: This merge request was unqueued

oscar.ledauphin@datadoghq.com unqueued this merge request

where
D: Deserializer<'de>,
{
let Some(raw) = Option::<String>::deserialize(deserializer)? else {
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Small detail but this implies agent version is always a string, because otherwise the ? here is the only place we will return an Err and thus make the whole schema un-parsable.

In a more general note, I don't like how any parse failure in a field on the schema fails the deserialization of the whole struct because it makes for some really unclear errors. I don't have a solution tho :/

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3 participants