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feat: resolve interpreted-runtime frames in eBPF pprof profiles (--language python) - #1297
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Included review availability: Your plan includes up to 8 reviews per rolling hour; 5 remain after this review. 📝 WalkthroughWalkthroughThe eBPF pprof converter now supports interpreted Python frames. It normalizes Python names, resolves frames by repository source paths, bypasses native build-ID filtering, and ingests Python call relationships with sampled provenance. Tests, CLI help, and documentation cover the workflow. ChangesInterpreted Python eBPF tracing
Estimated code review effort: 3 (Moderate) | ~25 minutes Merge Risk: 🔵 Low · up to Python profile frames are now resolved through repository path containment, but Windows, symlinked, or non-canonical paths may still cause valid frames to remain unresolved. The change is mergeable with explicit owner awareness and follow-up for this bounded compatibility risk. Sequence Diagram(s)sequenceDiagram
participant EBPFPprofConverter
participant FrameResolver
participant TraceResolver
participant TraceGraph
EBPFPprofConverter->>FrameResolver: normalize and resolve Python source-path frames
FrameResolver->>TraceResolver: return resolved in-repository frames
TraceResolver->>TraceGraph: create dynamic_sampled call relationships
Possibly related PRs
Suggested labels: 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
✨ Finishing Touches 💡 1📝 Generate docstrings 💡
🧪 Generate unit tests (beta)
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Inline comments:
In `@docs/guide/dynamic-tracing.md`:
- Around line 500-510: Update the Python eBPF tracing documentation near the
existing Python frame handling description to state that convert_ebpf_pprof
produces sampled=True profiles and that dynamic_call_count is approximate.
Explicitly distinguish this from the exact counts produced by the in-process
Python tracer.
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codebase_rag/cli_help.pycodebase_rag/tests/test_dynamic_trace_ebpf.pycodebase_rag/trace/ebpf_pprof.pydocs/guide/dynamic-tracing.md
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Greptile SummaryThis change adds Python interpreted-frame support for eBPF pprof conversion and routes resulting records through the Python graph resolver. Direct CLI execution confirmed that Python eBPF conversion works with Confidence Score: 4/5The implementation should not be merged as-is because users following the Python eBPF help text receive an unsupported-language error instead of converted trace output. Direct execution exercised both command forms against the same generated eBPF profile: the documented incomplete form failed without output, while the complete form produced a Python call record. The remaining issue is a localized repository naming-rule violation in test code. Files Needing Attention:
 T-Rex LogsWhat T-Rex did
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@coderabbitai Addressed in b82a4e1. Added a sentence to the interpreted-runtimes docs section stating Python eBPF profiles are sampled: ingested edges carry |
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@greptile-apps Thanks, both reviewed:
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Tip For best results, initiate chat on the files or code changes. 🧩 Analysis chain🏁 Script executed: #!/bin/bash
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git show --stat --oneline b82a4e16
git show --format=fuller --find-renames -- docs/guide/dynamic-tracing.md b82a4e16Length of output: 1535
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Both noted, thanks for the follow-ups.
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…esolve on Windows
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Added 792c1e0: the new convert -> ingest end-to-end test surfaced a pre-existing cross-platform bug on the Windows CI runner. The pprof/eBPF (and V8/Lua/Dart/PHP) converters emit POSIX frame paths, but the frame resolvers gated repo-containment on |
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Inline comments:
In `@codebase_rag/trace/resolution.py`:
- Around line 22-39: Update _repo_relative to resolve the frame path and
repository root as Path objects, use relative_to() for canonical containment
instead of a string prefix check, and return the resulting relative path in
POSIX form; preserve None for frames outside the repository, including invalid
or non-relative paths. Add regression coverage for parent-directory traversal,
Windows case differences, and symlink aliases.
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codebase_rag/trace/resolution.py
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@coderabbitai Partially adopted in eadcb56. Taken: Declined (with reasoning): the full
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Tip For best results, initiate chat on the files or code changes. 🧩 Analysis chain🏁 Script executed: #!/bin/bash
set -euo pipefail
git show --stat --oneline eadcb560
git show --format=fuller --find-renames eadcb560 -- codebase_rag/trace/resolution.py codebase_rag/tests
printf '\n--- resolution outline ---\n'
ast-grep outline codebase_rag/trace/resolution.py --items all --type function,class --match 'repo|FrameResolver|JsFrameResolver|PhpFrameResolver' || true
printf '\n--- helper and test references ---\n'
rg -n -C 8 'def _repo_relative|_repo_relative\(|test_repo_relative_collapses_parent_traversal_and_gates_escapes|_callables_by_path' \
codebase_rag/trace/resolution.py codebase_rag/testsLength of output: 25395
The decision not to use The traversal finding is addressed. ✏️ Learnings added
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…Windows/macOS portability
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Closes the last open follow-up on #1287: interpreted-runtime frames.
What
cgr trace convert --format ebpf --language pythonnow resolves the source-level frames an eBPF profiler (OpenTelemetry, Parca, Pyroscope) unwinds from the interpreter stack in the kernel. Those frames arrive as names against the real.pyfile (<module>, a bareleaf_compute, orService.handle_request), not as native binary addresses, so the native Go/Rust/C++ path could not handle them.How
The native path assumes each frame is an address in the target's own binary: it demangles the symbol and filters frames to a
--build-idmapping. Neither holds for interpreted frames, so--language pythontakes a different route, all automatic:py::prefix the perf-map symbolisation route (which some profilers reuse) prepends. No native demangler runs.--build-idfiltering. Interpreted frames live in the interpreter's mapping, not the target binary, so a native build-id would drop every one. They are scoped to the project by source-path containment instead (the same containment/--path-mapre-anchoring the native path already applies).language=python, so ingestion routes the records to the existing PythonFrameResolver— the same resolver the in-processsys.monitoringtracer feeds. No ingest changes.Verification
The two frame shapes the tests are built against were captured from real profiles of a Python 3.12 workload:
py::Service.handle_request(Class.method,py::-prefixed, definition line inFunction.start_line)leaf_compute(bare name)4 new tests cover
py::stripping + Class.method preservation,<module>binding, seen-through/counted out-of-repo stdlib frames, the build-id bypass, and a full convert -> ingest -> resolve proof that the frames bind to Module/Method/Function graph nodes with zero unresolved. Fulldynamic_tracesuite: 223 passed.Scope
Python only, since that is the shape I could verify against real captures. The machinery is language-parameterised (
_INTERPRETED_NAME_FNS), so JVM/Ruby drop in as small follow-ups once a real profile of each is available to design the frame/label shape against. Docs and--languagehelp updated.Summary by CodeRabbit
New Features
--language pythonoption for tracing Python runtimes.Bug Fixes
Documentation