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ExeBench-FHD: Addressing Fidelity Issues in Decompiler Evaluation

Akarsh Ashok, Dinil Mon Divakaran, Vivek Balachandran · 2026 · arXiv (Cornell University)

DOI: 10.48550/arxiv.2610.28212 · cited by 0 works (OpenAlex) · open-access PDF

Hindi

ExeBench का विश्लेषण करते हुए हम ExeBench का विश्लेषण करते हैं और नौ मुद्दों को पहचानते हैं जो प्रभावित करते हैं कि एक परीक्षण मिक्सर एक decompiler को कितनी ईमानदारी से मापता है। उनमें से तीन एलएलएम decompilers को ExeBench के कार्य से सी कोड को पुनर्प्राप्त करने से रोकते हैं। ये अविश्वसनीय पैरामीटर क्रम हैं जब पूरे और फ्लोटिंग बिंदु प्रकार मिश्रित होते हैं, अप्रयुक्त पैरामीटर जो अनुकूलित असेंबली को कम कर सकते हैं, और कार्य के असेंबली कोड के बाहर संग्रहीत निरंतर। छह और परीक्षण वैधता को प्रभावित करते हैं: एक वापसी के बिना गैर-वॉयड फ़ंक्शन, स्थान धारक प्रकार, अनुकूल

Machine translation (Meta M2M100); the English original follows.

Abstract

ExeBench is one of the most widely used benchmarks for evaluating LLM-based decompilers. We analyze ExeBench and identify nine issues that affect how faithfully a test measures a decompiler. Three of them prevent LLM decompilers from recovering C code from ExeBench's function. These are ambiguous parameter order when integer and floating-point types are mixed, unused parameters that optimized assembly may drop, and constants stored outside the function's assembly code. Six more affect test validity: non-void functions without a return, placeholder types, static or inline functions removed by the optimizer, functions named main, trivial bodies and truncated definitions. We present ExeBench-FHD, a backward-compatible revision of ExeBench that adds 16 new fields: call-site assembly, data sections, test wrappers, linked-binary disassembly and five warning flags. In ExeBench, 38.9% of functions have at least one of the five flags; dropping records with any of the four warning flags (all except unused_param, which marks functions that the new wrappers make evaluable) keeps 63.9% of the corpus. In an evaluation at -O2 on four architectures, the new fields raise GPT 6 Sol's re-execution rate by up to 26.5%, 19.1% and 21.0% on functions that read data sections, mix parameter types and have unused parameters, respectively.

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Topics: Computer science, Fidelity, Code (set theory), Test (biology), Integer (computer science), Order (exchange)

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