cilium/tetragon
Dec 2024 – Jun 2025
5 Months active
Languages Used
CGoMarkdownYAML
Technical Skills
API DevelopmentBPFBTFData StructuresDebuggingDocumentation
Tristan d'Audibert
PROFILE
Tristan D'audibert
Contributed to the cilium/tetragon repository by developing advanced kernel tracing and observability features, focusing on dynamic argument extraction and robust BTF handling. Leveraged Go and C to implement utilities for resolving nested kernel data fields, enhancing tracing policy flexibility and reliability across Kprobes, LSM hooks, and uprobes. Improved kernel compatibility and data fidelity through targeted bug fixes, comprehensive unit testing, and expanded test infrastructure. Refactored core parsing logic to increase code maintainability and clarity, introducing helpers for capability parsing. Emphasized code quality, regression resistance, and clear documentation, resulting in safer deployments and more efficient debugging in complex system programming environments.
Overall Statistics
Feature vs Bugs
78%Features
Repository Contributions
27Total
Bugs
2
Commits
27
Features
7
Lines of code
1,362
Activity Months5
Your Network
136 peopleSame Organization
@orange.com51
HUE Carine INNOV/IT-SMember
ANIORT Vincent INNOV/IT-SMember
Afrah BOUSSAADAMember
Alexandre VeyrencMember
Benoit SUZANNEMember
Hue CarineMember
Cedric CHEDALEUXMember
Damien GOMEZMember
COMBROUSE DimitriMember
Work History
June 2025
1 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for cilium/tetragon focusing on code quality and maintainability improvements. Delivered a refactor of the ParseMatchCaps function in pkg/selectors to improve maintainability and readability, and introduced a new helper capsStrToUint64 to centralize the parsing of capability strings into a uint64 representation. The change reduces parsing complexity, clarifies intent, and prepares for future capability-related enhancements. Related commit included: 640fff8209ef998f0b9aad9533f18995856bf8dd (pkg/selectors: Move values parsing in `ParseMatchCaps` in specific a func).
1 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for cilium/tetragon focusing on code quality and maintainability improvements. Delivered a refactor of the ParseMatchCaps function in pkg/selectors to improve maintainability and readability, and introduced a new helper capsStrToUint64 to centralize the parsing of capability strings into a uint64 representation. The change reduces parsing complexity, clarifies intent, and prepares for future capability-related enhancements. Related commit included: 640fff8209ef998f0b9aad9533f18995856bf8dd (pkg/selectors: Move values parsing in `ParseMatchCaps` in specific a func).
June 2025
March 2025
8 Commits • 1 Features
Mar 1, 2025March 2025: Delivered reliability-driven improvements for cilium/tetragon, including a critical BPF LSM availability detection bug fix and a substantial upgrade to BTF testing and test infrastructure. The changes improve security enforcement accuracy, expand test coverage across BTF specs, and enhance CI/debug artifacts for faster issue diagnosis and greater product stability.
March 2025
8 Commits • 1 Features
Mar 1, 2025March 2025: Delivered reliability-driven improvements for cilium/tetragon, including a critical BPF LSM availability detection bug fix and a substantial upgrade to BTF testing and test infrastructure. The changes improve security enforcement accuracy, expand test coverage across BTF specs, and enhance CI/debug artifacts for faster issue diagnosis and greater product stability.
February 2025
5 Commits • 2 Features
Feb 1, 2025February 2025 monthly highlights for cilium/tetragon focused on robust BTF handling, kernel compatibility, and expanded test coverage. Key features delivered include BTF Loading and Parameter Extraction Enhancements (LoadBTF with environment-aware paths and FindBtfFuncParamFromHook) and Broadening BTF Validation Testing (genericTestSpecs across all known BTF files). Major bugs fixed include BTF LSM Hook Resolution Compatibility and improved error handling by skipping Resolve-based parameter resolution for kernels older than 5.7 and clarifying alternatives (e.g., kprobes). Overall impact: increased resilience across development and CI environments, reduced kernel-compatibility risks, and stronger test coverage leading to safer deployments and faster debugging. Technologies/skills demonstrated: Go-based BTF handling, kernel ABI awareness, test automation, and clear user guidance for edge cases.
5 Commits • 2 Features
Feb 1, 2025February 2025 monthly highlights for cilium/tetragon focused on robust BTF handling, kernel compatibility, and expanded test coverage. Key features delivered include BTF Loading and Parameter Extraction Enhancements (LoadBTF with environment-aware paths and FindBtfFuncParamFromHook) and Broadening BTF Validation Testing (genericTestSpecs across all known BTF files). Major bugs fixed include BTF LSM Hook Resolution Compatibility and improved error handling by skipping Resolve-based parameter resolution for kernels older than 5.7 and clarifying alternatives (e.g., kprobes). Overall impact: increased resilience across development and CI environments, reduced kernel-compatibility risks, and stronger test coverage leading to safer deployments and faster debugging. Technologies/skills demonstrated: Go-based BTF handling, kernel ABI awareness, test automation, and clear user guidance for edge cases.
February 2025
January 2025
2 Commits • 2 Features
Jan 1, 2025January 2025 monthly summary for cilium/tetragon focusing on kernel data extraction and parsing enhancements. Delivered an Argument Depth Extraction Utility to reliably read data from argument buffers, including pointer fields via probe_read, and added comprehensive unit tests to strengthen BTF parsing reliability (FindBtfFuncParamFromHook). These changes improve data fidelity, observability safety, and regression resistance, enabling faster issue diagnosis and more trustworthy telemetry with safer kernel instrumentation.
January 2025
2 Commits • 2 Features
Jan 1, 2025January 2025 monthly summary for cilium/tetragon focusing on kernel data extraction and parsing enhancements. Delivered an Argument Depth Extraction Utility to reliably read data from argument buffers, including pointer fields via probe_read, and added comprehensive unit tests to strengthen BTF parsing reliability (FindBtfFuncParamFromHook). These changes improve data fidelity, observability safety, and regression resistance, enabling faster issue diagnosis and more trustworthy telemetry with safer kernel instrumentation.
December 2024
11 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for cilium/tetragon focusing on engineering work and business impact. The team delivered a dynamic parameter extraction feature (arg.Resolve) based on BTF paths for Kprobes, LSM hooks, and uprobes, enabling robust tracing of nested data fields and grandparent process command information. This work includes extensive code changes, tests, and documentation to support production use and policy-driven tracing.
11 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for cilium/tetragon focusing on engineering work and business impact. The team delivered a dynamic parameter extraction feature (arg.Resolve) based on BTF paths for Kprobes, LSM hooks, and uprobes, enabling robust tracing of nested data fields and grandparent process command information. This work includes extensive code changes, tests, and documentation to support production use and policy-driven tracing.
December 2024
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Quality Metrics
Correctness86.0%
Maintainability87.4%
Architecture83.6%
Performance75.2%
AI Usage20.0%
Skills & Technologies
Programming Languages
CGoMarkdownYAML
Technical Skills
API DevelopmentBPFBTFBackend DevelopmentCI/CDCode OrganizationCode RefactoringCode StandardsData StructuresDebuggingDocumentationGitHub ActionsGoGo DevelopmentKernel Development
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