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Why C Has Always Broken Static Analysis | Blog | Endor Labs
endorlabs.comarticle

Why C Has Always Broken Static Analysis | Blog | Endor Labs

Endor Labs analyzes four structural reasons C/C++ static analysis has historically underperformed: preprocessor/build dependence, hard pointer-aliasing tradeoffs (over- vs under-approximation), pattern rules poorly suited to length/lifetime bugs vs. web-style source-sink flaws, and the lack of dominant frameworks to model (unlike Spring for Java). It cites a study of 8,918 C++ programs showing LLM-generated code triggers confirmed runtime memory-safety violations (CWE-190, -122, -121) at 3.6x the human rate, bugs invisible to static-only CI gates and only caught by sanitizers/model checking. It surveys existing analyzer approaches (Coverity/Klocwork/CodeSonar build-based, Veracode binary-based, build-less scanners, generalist multi-language SAST) and their tradeoffs.

TL;DR A breakdown of why C/C++ static analysis has always been weaker than other languages, and how AI-generated code is amplifying the same old memory-safety bug classes at 3.6x the human rate.
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Technologies named here

Techniques named here

  • Pointer aliasing analysis tradeoff
  • Source-to-sink pattern rules
  • Framework modeling for rule-based analysis
  • AI-generated code pattern imitation
  • Signed integer overflow / buffer overflow

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