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Preprint Sep 2026

CONCURDEP: Event-Guided Analysis of Dependency Invalidation in CPython Concurrency

Removing CPython's Global Interpreter Lock (GIL) exposes native code to concurrency absent from ordinary C types. Mutation or re-entry can revoke a borrowed object, storage pointer, traversal state, or lease between acquisition and use while its owner remains alive, causing native memory errors and runtime-state corrup...

Bai-Hong Chen, Hadley Westover, Wen Li · 0 citations
Preprint Sep 2026

CPyGraph: A Version-Aware Static Analysis Framework for Native CPython Bytecode

Static analysis of Python packages must recover both program structure and object flow across first-class functions, dynamic dispatch, implicit protocol calls, exceptions, closures, and module execution. Native CPython bytecode provides the executable lowering of these behaviors, but its instruction, call, stack, and e...

Bai-Hong Chen, Wen Li · 0 citations
Preprint Sep 2026

Python Import as an Execution Boundary: An Empirical Study of Bugs, Vulnerabilities, and Analysis Gaps

Python import does more than resolve dependencies: it executes code during module and package initialization. This behavior can trigger failures, load dynamic or native code, access resources, or change security-sensitive state before an application calls a package API. Prior work studies package selection, malicious p...

Bai-Hong Chen, Wen Li · 0 citations

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