joernio/joern
Oct 2024 – Jul 2026
12 Months active
Languages Used
ScalaJavaPythonC#HOCONXMLConfShell
Technical Skills
Code Property GraphCode RefactoringCompiler DevelopmentCompiler EngineeringData Flow AnalysisFrontend Development
Xavier Pinho
PROFILE
Xavier Pinho
Over the past year, contributed to the joernio/joern repository by engineering advanced language frontends and code analysis features. Developed and enhanced C#, Python, Java, and Rust parsing pipelines, focusing on AST generation, type resolution, and code property graph construction. Improved static and data flow analysis, implemented robust handling for language-specific constructs, and expanded support for modern features such as Rust traits and C# top-level statements. Leveraged Scala, Rust, and C# to deliver reliable backend and frontend components, while refining CI/CD workflows and validation logic. The work enabled more accurate, maintainable, and extensible code analysis across multiple programming languages.
Overall Statistics
Feature vs Bugs
81%Features
Repository Contributions
106Total
Bugs
9
Commits
106
Features
38
Lines of code
18,107
Activity Months12
Your Network
23 peopleShared Repositories
23
Work History
July 2026
12 Commits • 5 Features
Jul 1, 2026July 2026: Delivered foundational Rust frontend enhancements to the Code Property Graph (CPG) with a focus on business value and code correctness. Key progress includes initial Rust trait support and method resolution in CPG, improved self-reference handling during AST creation, and the introduction of detachedAsts to separate inherent implementations for future linker integration. Also added lowering support for Rust range expressions and conditional compilation attributes, backed by tests and tooling upgrades to ensure stability and faster iteration.
12 Commits • 5 Features
Jul 1, 2026July 2026: Delivered foundational Rust frontend enhancements to the Code Property Graph (CPG) with a focus on business value and code correctness. Key progress includes initial Rust trait support and method resolution in CPG, improved self-reference handling during AST creation, and the introduction of detachedAsts to separate inherent implementations for future linker integration. Also added lowering support for Rust range expressions and conditional compilation attributes, backed by tests and tooling upgrades to ensure stability and faster iteration.
July 2026
June 2026
14 Commits • 2 Features
Jun 1, 2026June 2026 monthly summary for joernio/joern: Delivered substantial Rust frontend enhancements and lowering capabilities, with focus on type resolution, AST compatibility, and broad support for Rust constructs. Improvements enable more accurate code property graphs and reduce downstream maintenance by aligning AST generation with updated tooling. Included a bug fix to ensure consistent dispatch by correcting argument indexing and self-receiver handling.
June 2026
14 Commits • 2 Features
Jun 1, 2026June 2026 monthly summary for joernio/joern: Delivered substantial Rust frontend enhancements and lowering capabilities, with focus on type resolution, AST compatibility, and broad support for Rust constructs. Improvements enable more accurate code property graphs and reduce downstream maintenance by aligning AST generation with updated tooling. Included a bug fix to ensure consistent dispatch by correcting argument indexing and self-receiver handling.
May 2026
13 Commits • 1 Features
May 1, 2026May 2026 – Joern Rust AST/CPG Core Enhancements and Bug Fixes Overview: Focused on strengthening Rust code analysis, expanding AST/CPG capabilities, and stabilizing cross-platform tests to deliver more accurate Rust queries, faster investigations, and higher developer productivity. Key outcomes: - Strengthened Rust AST/CPG Core: enhanced AST generation, naming, type resolution, module handling, structs, tuples, and parsing, with expanded test coverage validating Rust AST/CPG behavior. Included support for mod { } declarations, lower-cased structs, and improved handling of control structures. - Upgraded and leveraged Rust tooling: introduced rust_ast_gen 0.7.0 and implemented rust_ast_gen-based methodFullNames and typeFullNames for accurate symbol resolution and naming, complemented by tests for control structures and complex Rust constructs. - Additional feature work: added tests for let without RHS, lower tuple-like struct declarations, and lower tuple accessors as field accesses to strengthen edge-case coverage. - Major bug fixes: removed the VIRTUAL modifier from global methods to align Rust semantics and updated tests accordingly; addressed issues around global method modifiers and edge cases in AST generation. - Reliability and test stability: fixed platform-agnostic test path handling, improving cross-environment test reliability and reducing flakiness. Impact and business value: - More accurate Rust code analysis in the CodePropertyGraph foundation enables reliable code search, vulnerability detection, and governance for Rust projects. - Reduced debugging time and faster iteration for Rust-driven features due to higher confidence in AST/CPG representations and broader test coverage. - Strengthened developers’ toolchain with updated rust_ast_gen and enhanced symbol resolution, supporting downstream capabilities like smarter queries and automated code intelligence. Technologies and skills demonstrated: - Rust language analysis, AST/CPG core engineering, symbol extraction (methodFullNames, typeFullNames) - Test-driven development and cross-platform test stabilization - Tooling upgrades (rust_ast_gen 0.7.0) and enduring code quality improvements
13 Commits • 1 Features
May 1, 2026May 2026 – Joern Rust AST/CPG Core Enhancements and Bug Fixes Overview: Focused on strengthening Rust code analysis, expanding AST/CPG capabilities, and stabilizing cross-platform tests to deliver more accurate Rust queries, faster investigations, and higher developer productivity. Key outcomes: - Strengthened Rust AST/CPG Core: enhanced AST generation, naming, type resolution, module handling, structs, tuples, and parsing, with expanded test coverage validating Rust AST/CPG behavior. Included support for mod { } declarations, lower-cased structs, and improved handling of control structures. - Upgraded and leveraged Rust tooling: introduced rust_ast_gen 0.7.0 and implemented rust_ast_gen-based methodFullNames and typeFullNames for accurate symbol resolution and naming, complemented by tests for control structures and complex Rust constructs. - Additional feature work: added tests for let without RHS, lower tuple-like struct declarations, and lower tuple accessors as field accesses to strengthen edge-case coverage. - Major bug fixes: removed the VIRTUAL modifier from global methods to align Rust semantics and updated tests accordingly; addressed issues around global method modifiers and edge cases in AST generation. - Reliability and test stability: fixed platform-agnostic test path handling, improving cross-environment test reliability and reducing flakiness. Impact and business value: - More accurate Rust code analysis in the CodePropertyGraph foundation enables reliable code search, vulnerability detection, and governance for Rust projects. - Reduced debugging time and faster iteration for Rust-driven features due to higher confidence in AST/CPG representations and broader test coverage. - Strengthened developers’ toolchain with updated rust_ast_gen and enhanced symbol resolution, supporting downstream capabilities like smarter queries and automated code intelligence. Technologies and skills demonstrated: - Rust language analysis, AST/CPG core engineering, symbol extraction (methodFullNames, typeFullNames) - Test-driven development and cross-platform test stabilization - Tooling upgrades (rust_ast_gen 0.7.0) and enduring code quality improvements
May 2026
April 2026
3 Commits • 1 Features
Apr 1, 2026April 2026 (2026-04) focused on expanding Joern’s code analysis capabilities to Rust by delivering a Rust frontend that can generate Code Property Graphs (CPGs) from Rust sources. This work integrates the Rust AST generator into existing analysis workflows and adds a RustJsonParser to parse Rust ASTs from JSON. CI/workflow updates were made to accommodate Rust frontend changes, enabling broader language coverage and earlier detection of Rust-related issues.
April 2026
3 Commits • 1 Features
Apr 1, 2026April 2026 (2026-04) focused on expanding Joern’s code analysis capabilities to Rust by delivering a Rust frontend that can generate Code Property Graphs (CPGs) from Rust sources. This work integrates the Rust AST generator into existing analysis workflows and adds a RustJsonParser to parse Rust ASTs from JSON. CI/workflow updates were made to accommodate Rust frontend changes, enabling broader language coverage and earlier detection of Rust-related issues.
February 2026
1 Commits
Feb 1, 2026February 2026 monthly summary for joern/joern: Strengthened Semantic Code Property Graph (SCPG) validation by introducing a duplicate order check for CFG nodes and extending it to non-CFG/AST nodes, improving data integrity and robustness. The change enforces order > -1, handles -1 safely, and updates the post-frontend validator accordingly. This delivered higher reliability for downstream analyses and reduced debugging time associated with CFG order collisions.
1 Commits
Feb 1, 2026February 2026 monthly summary for joern/joern: Strengthened Semantic Code Property Graph (SCPG) validation by introducing a duplicate order check for CFG nodes and extending it to non-CFG/AST nodes, improving data integrity and robustness. The change enforces order > -1, handles -1 safely, and updates the post-frontend validator accordingly. This delivered higher reliability for downstream analyses and reduced debugging time associated with CFG order collisions.
February 2026
January 2026
1 Commits • 1 Features
Jan 1, 2026Month: 2026-01 — Focus on delivering and validating code analysis improvements in the joernio/joern repository. Key deliverable this month: Block Node Support for the Control Dependence Graph (CDG) pass, enabling more precise analysis of block-structured code. No major bugs fixed this month. Remaining items were stability and quality improvements tied to the new CDGBlockNode support, with fixes addressed in subsequent iterations as needed. Overall impact: The CDG pass now handles block nodes, increasing the accuracy of control flow analyses and downstream query results, which improves developer confidence when analyzing complex codebases and enables more reliable security and correctness checks. Technologies/skills demonstrated: Code analysis pipelines, Control Dependence Graph and CDGPass enhancements, x2cpg workflow indicator in commit, and PR-driven collaboration within joernio/joern.
January 2026
1 Commits • 1 Features
Jan 1, 2026Month: 2026-01 — Focus on delivering and validating code analysis improvements in the joernio/joern repository. Key deliverable this month: Block Node Support for the Control Dependence Graph (CDG) pass, enabling more precise analysis of block-structured code. No major bugs fixed this month. Remaining items were stability and quality improvements tied to the new CDGBlockNode support, with fixes addressed in subsequent iterations as needed. Overall impact: The CDG pass now handles block nodes, increasing the accuracy of control flow analyses and downstream query results, which improves developer confidence when analyzing complex codebases and enables more reliable security and correctness checks. Technologies/skills demonstrated: Code analysis pipelines, Control Dependence Graph and CDGPass enhancements, x2cpg workflow indicator in commit, and PR-driven collaboration within joernio/joern.
April 2025
1 Commits
Apr 1, 2025April 2025 monthly summary for the joernio/joern repository focused on delivering a critical C# frontend bug fix and strengthening AST code extraction fidelity. Upgraded the dotnetastgen_version and refined the extraction logic to ensure the .code property accurately reflects the source across AST nodes, including multi-line statements and comments. This improvement reduces parsing errors, enhances code snippet reliability, and improves downstream analysis and documentation workflows.
1 Commits
Apr 1, 2025April 2025 monthly summary for the joernio/joern repository focused on delivering a critical C# frontend bug fix and strengthening AST code extraction fidelity. Upgraded the dotnetastgen_version and refined the extraction logic to ensure the .code property accurately reflects the source across AST nodes, including multi-line statements and comments. This improvement reduces parsing errors, enhances code snippet reliability, and improves downstream analysis and documentation workflows.
April 2025
February 2025
12 Commits • 5 Features
Feb 1, 2025February 2025: Major C# parsing/AST/CPG enhancements in joernio/joern delivering higher fidelity code analysis and business value. Implemented key features and fixes across anonymous types naming, nested local functions, property setter/compound assignment translation, enhanced invocation/field access and null-conditional AST handling, and top-level statements/object creation. These changes improve accuracy of the Code Property Graph, reduce false positives/negatives in analyses, and enable more reliable security and maintenance workflows for C# codebases. Delivered through coordinated commits across five feature areas with concrete refactoring and tests to support robust parsing and analysis.
February 2025
12 Commits • 5 Features
Feb 1, 2025February 2025: Major C# parsing/AST/CPG enhancements in joernio/joern delivering higher fidelity code analysis and business value. Implemented key features and fixes across anonymous types naming, nested local functions, property setter/compound assignment translation, enhanced invocation/field access and null-conditional AST handling, and top-level statements/object creation. These changes improve accuracy of the Code Property Graph, reduce false positives/negatives in analyses, and enable more reliable security and maintenance workflows for C# codebases. Delivered through coordinated commits across five feature areas with concrete refactoring and tests to support robust parsing and analysis.
January 2025
30 Commits • 16 Features
Jan 1, 2025January 2025 monthly summary for joernio/joern focusing on business value and technical achievements across the codebase. Key features delivered: - AST and member access refactor: finished refactoring astForSimpleMemberAccess to improve accuracy of member access analysis. Commit ec2b51785385e947fc9e4fecb30301748bcc7b5c. This enables more reliable code understanding for complex expressions and reduces downstream analysis fixes. - Namespace and nested field access support: added support for namespace references in nested field accesses, enabling correct analysis across modular code boundaries. Commit 2d0281bc1329d3cdb9ba2a190af543ef4e7db69c. - Implicit constructors for field initializers: introduced implicit constructors for field and static field initializers to simplify representation and analysis. Commits 76dd74a1ec31ad3b477715ef2edece0506a1a6c1 and 277fc6c896047979bf15bed241858ac0efb9d581. - Fully-qualified name resolution without imports: enabled resolving fully-qualified names without prior imports, reducing friction for cross-namespace references. Commit 4034bb68762ed427f3999d548d18dcf280b8918e. - Top-level method declarations: added support for top-level method declarations in C#, broadening language feature coverage. Commit 457d8d815d4840c53dae6abfb426e8b57553f464. Major bugs fixed: - Warning fix for MemberBindingExpression: corrected an erroneous not-handled-yet warning, improving stability of member binding analysis. Commit 3d82f38a4d1847f78f513d3087a338d784eb2a62. Overall impact and accomplishments: - Expanded language feature coverage and robustness of the code analysis, enabling deeper insights into modern C# code bases with fewer manual adjustments. - Laid foundation for improved interoperability with complex namespaces, getters, and extension methods, aligning with user expectations for accurate code intelligence. - Strengthened cross-platform readiness with tooling upgrades and foundational changes that support Linux ARM64 builds. Technologies/skills demonstrated: - C# language features and AST transformations, including getter/accessor mapping, implicit constructors, and top-level declarations. - Advanced static analysis concepts such as fully-qualified name resolution and namespace handling. - Build tooling and platform readiness improvements, including dotnetastgen upgrades and Linux ARM64 support.
30 Commits • 16 Features
Jan 1, 2025January 2025 monthly summary for joernio/joern focusing on business value and technical achievements across the codebase. Key features delivered: - AST and member access refactor: finished refactoring astForSimpleMemberAccess to improve accuracy of member access analysis. Commit ec2b51785385e947fc9e4fecb30301748bcc7b5c. This enables more reliable code understanding for complex expressions and reduces downstream analysis fixes. - Namespace and nested field access support: added support for namespace references in nested field accesses, enabling correct analysis across modular code boundaries. Commit 2d0281bc1329d3cdb9ba2a190af543ef4e7db69c. - Implicit constructors for field initializers: introduced implicit constructors for field and static field initializers to simplify representation and analysis. Commits 76dd74a1ec31ad3b477715ef2edece0506a1a6c1 and 277fc6c896047979bf15bed241858ac0efb9d581. - Fully-qualified name resolution without imports: enabled resolving fully-qualified names without prior imports, reducing friction for cross-namespace references. Commit 4034bb68762ed427f3999d548d18dcf280b8918e. - Top-level method declarations: added support for top-level method declarations in C#, broadening language feature coverage. Commit 457d8d815d4840c53dae6abfb426e8b57553f464. Major bugs fixed: - Warning fix for MemberBindingExpression: corrected an erroneous not-handled-yet warning, improving stability of member binding analysis. Commit 3d82f38a4d1847f78f513d3087a338d784eb2a62. Overall impact and accomplishments: - Expanded language feature coverage and robustness of the code analysis, enabling deeper insights into modern C# code bases with fewer manual adjustments. - Laid foundation for improved interoperability with complex namespaces, getters, and extension methods, aligning with user expectations for accurate code intelligence. - Strengthened cross-platform readiness with tooling upgrades and foundational changes that support Linux ARM64 builds. Technologies/skills demonstrated: - C# language features and AST transformations, including getter/accessor mapping, implicit constructors, and top-level declarations. - Advanced static analysis concepts such as fully-qualified name resolution and namespace handling. - Build tooling and platform readiness improvements, including dotnetastgen upgrades and Linux ARM64 support.
January 2025
December 2024
10 Commits • 4 Features
Dec 1, 2024December 2024 monthly summary for joernio/joern: Focused on simplifying maintenance, accelerating C# code analysis, and improving AST accuracy. Key outcomes include the removal of the deprecated Ruby frontend, a substantial expansion of the C# frontend with a new source parser and rich configuration, and cross-language AST standardization for reliable code-property graph generation. The work reduces maintenance overhead, improves analysis accuracy for modern C# features, and sets a foundation for future language frontends.
December 2024
10 Commits • 4 Features
Dec 1, 2024December 2024 monthly summary for joernio/joern: Focused on simplifying maintenance, accelerating C# code analysis, and improving AST accuracy. Key outcomes include the removal of the deprecated Ruby frontend, a substantial expansion of the C# frontend with a new source parser and rich configuration, and cross-language AST standardization for reliable code-property graph generation. The work reduces maintenance overhead, improves analysis accuracy for modern C# features, and sets a foundation for future language frontends.
November 2024
5 Commits • 2 Features
Nov 1, 2024November 2024: Key features delivered and stability improvements across the joern frontend suite, with measurable business value in data flow analysis reliability and test stability. Delivered cross-language data flow analysis enhancements and Kotlin frontend improvements that reduce runtime issues and streamline dependency handling for faster CI feedback and more accurate code property graphs.
5 Commits • 2 Features
Nov 1, 2024November 2024: Key features delivered and stability improvements across the joern frontend suite, with measurable business value in data flow analysis reliability and test stability. Delivered cross-language data flow analysis enhancements and Kotlin frontend improvements that reduce runtime issues and streamline dependency handling for faster CI feedback and more accurate code property graphs.
November 2024
October 2024
4 Commits • 1 Features
Oct 1, 2024Month: 2024-10 focused on strengthening static analysis capabilities and frontend reliability across the Joern project. Key features delivered include dataflow engine enhancements adding modulo operator semantics and improved array initializer taint propagation, with tests validating taint flow and ensuring non-tainting between operands while results taint propagate. Frontend improvements fixed Kotlin source file extension handling in the Console frontend to align with standard .kt usage, and improved Python module handling in the pysrc2cpg frontend by refining constants for module constructs and __init__ methods. Major bugs fixed include Kotlin extension handling correction and refined Python constants for module-level constructs and __init__ recognition. Overall impact: increased taint-analysis accuracy, reduced false positives/negatives, and more reliable Kotlin and Python source processing, enabling safer code analysis and faster onboarding for new repos. Technologies/skills demonstrated: static dataflow analysis, taint propagation testing, Kotlin/Python frontend debugging, cross-repo PR collaboration and review.
October 2024
4 Commits • 1 Features
Oct 1, 2024Month: 2024-10 focused on strengthening static analysis capabilities and frontend reliability across the Joern project. Key features delivered include dataflow engine enhancements adding modulo operator semantics and improved array initializer taint propagation, with tests validating taint flow and ensuring non-tainting between operands while results taint propagate. Frontend improvements fixed Kotlin source file extension handling in the Console frontend to align with standard .kt usage, and improved Python module handling in the pysrc2cpg frontend by refining constants for module constructs and __init__ methods. Major bugs fixed include Kotlin extension handling correction and refined Python constants for module-level constructs and __init__ recognition. Overall impact: increased taint-analysis accuracy, reduced false positives/negatives, and more reliable Kotlin and Python source processing, enabling safer code analysis and faster onboarding for new repos. Technologies/skills demonstrated: static dataflow analysis, taint propagation testing, Kotlin/Python frontend debugging, cross-repo PR collaboration and review.
Activity
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Quality Metrics
Correctness94.8%
Maintainability90.4%
Architecture90.2%
Performance80.4%
AI Usage33.0%
Skills & Technologies
Programming Languages
C#ConfHOCONJavaPythonRustScalaShellXMLYAML
Technical Skills
API DesignAST AnalysisAST CreationAST GenerationAST ManipulationAST ParsingAST TransformationAST generationAST manipulationAST parsingAbstract Syntax Tree (AST)Abstract Syntax Tree (AST) CreationAbstract Syntax Tree (AST) ManipulationAbstract Syntax TreesAbstract Syntax Trees (AST)
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline