feat!: Align tracer FFI error and response types with common conventions#2029
Merged
gh-worker-dd-mergequeue-cf854d[bot] merged 14 commits intoMay 29, 2026
Merged
Conversation
🎉 All green!🧪 All tests passed 🎯 Code Coverage (details) 🔗 Commit SHA: ed5becf | Docs | Datadog PR Page | Give us feedback! |
lloeki
force-pushed
the
lloeki/ffi-for-trace-exporter-improved
branch
from
405e95f to
dc8aeb9
Compare
Contributor
Clippy Allow Annotation ReportComparing clippy allow annotations between branches:
Summary by Rule
Annotation Counts by File
Annotation Stats by Crate
About This ReportThis 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. |
lloeki
force-pushed
the
lloeki/ffi-for-trace-exporter-improved
branch
from
dc8aeb9 to
b3784be
Compare
Codecov Report❌ Patch coverage is Additional details and impacted files@@ Coverage Diff @@
## main #2029 +/- ##
==========================================
+ Coverage 72.90% 72.93% +0.02%
==========================================
Files 460 460
Lines 76396 76463 +67
==========================================
+ Hits 55696 55765 +69
+ Misses 20700 20698 -2
🚀 New features to boost your workflow:
|
lloeki
force-pushed
the
lloeki/ffi-for-trace-exporter
branch
from
9d7998b to
5e2089f
Compare
lloeki
force-pushed
the
lloeki/ffi-for-trace-exporter-improved
branch
from
b3784be to
34f795a
Compare
Member
Author
|
There are some CI failures but I'm opening this for review. |
![chatgpt-codex-connector[bot]](https://avatars.githubusercontent.com/in/1144995?s=60&v=4){kind=small}
There was a problem hiding this comment.
💡 Codex Review
Here are some automated review suggestions for this pull request.
Reviewed commit: 1425e682b1
ℹ️ About Codex in GitHub
Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you
- Open a pull request for review
- Mark a draft as ready
- Comment "@codex review".
If Codex has suggestions, it will comment; otherwise it will react with 👍.
Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".
lloeki
force-pushed
the
lloeki/ffi-for-trace-exporter
branch
from
5e2089f to
b9ea727
Compare
lloeki
force-pushed
the
lloeki/ffi-for-trace-exporter-improved
branch
from
1425e68 to
3bd0ef7
Compare
ekump
force-pushed
the
lloeki/ffi-for-trace-exporter-improved
branch
from
8ed5a05 to
e6df3ba
Compare
Contributor
Artifact Size Benchmark Reportaarch64-alpine-linux-musl
aarch64-unknown-linux-gnu
libdatadog-x64-windows
libdatadog-x86-windows
x86_64-alpine-linux-musl
x86_64-unknown-linux-gnu
|
ekump
force-pushed
the
lloeki/ffi-for-trace-exporter-improved
branch
from
e6df3ba to
49384c0
Compare
hoolioh
requested changes
May 27, 2026
yannham
reviewed
May 27, 2026
Switch tracer span and chunk construction functions from `Option<Box<ExporterError>>` to `MaybeError` (`Option<ddog_Error>`). These functions only produce error messages (the error code is never used by callers), so the simpler `ddog_Error` type is sufficient. This lets C consumers use the existing `read_ddogerr_string_and_drop` and `get_error_details_and_drop` helpers instead of custom error handling. `send_trace_chunks` retains `ExporterError` because callers need the error code for HTTP response classification.
Replace the separate `*const u8` return + `out_len` out-parameter with a single `ByteSlice` return value. This bundles pointer and length into one FFI-safe struct, matching the existing slice conventions in libdd-common-ffi and avoiding the awkward split between return value and out-parameter.
Wrap the `fields` parameter in `Option` so the function can check for null and return an error instead of undefined behavior. cbindgen produces the same C signature (`const ddog_TracerSpanFields *`).
hoolioh
changed the title
lloeki
force-pushed
the
lloeki/ffi-for-trace-exporter-improved
branch
from
10ceab4 to
ce54277
Compare
yannham
approved these changes
May 28, 2026
Contributor
yannham
left a comment
yannham
left a comment
There was a problem hiding this comment.
Left some nits, but LGTM otherwise 👍
hoolioh
approved these changes
May 29, 2026
Contributor
|
/merge |
|
View all feedbacks in Devflow UI.
This pull request is not mergeable according to GitHub. Common reasons include pending required checks, missing approvals, or merge conflicts — but it could also be blocked by other repository rules or settings.
The expected merge time in
|
gh-worker-dd-mergequeue-cf854d
Bot
merged commit 1fb8aca
into
main
116 of 118 checks passed
gh-worker-dd-mergequeue-cf854d
Bot
deleted the
lloeki/ffi-for-trace-exporter-improved
branch
gh-worker-dd-devflow-36fce6
Bot
added
mergequeue-status: done
and removed
mergequeue-status: in_progress
labels
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
5 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
What does this PR do?
Two improvements to the tracer FFI surface in
libdd-data-pipeline-ffi:Check for nullable pointers.
Return
ByteSlicefromddog_trace_exporter_response_get_body.Replace the separate
*const u8return +out_lenout-parameter witha single
ByteSlicereturn value, matching the existing sliceconventions in
libdd-common-ffi.Motivation
FUP to #1952. C consumers (dd-trace-rb) can now use the existing
read_ddogerr_string_and_drop/get_error_details_and_drophelpersfrom
datadog_ruby_common.hinstead of custom error handling for tracerconstruction functions. The
ByteSlicereturn avoids an awkward splitbetween return value and out-parameter for the response body.
Additional Notes
AI was used to accelerate implementation; all code was reviewed and understood.
How to test the change?
All 40 tests pass (13 tracer + 3 response + 24 trace_exporter).