About: Reliable and Fast DWARF-Based Stack Unwinding

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type	http://eprints.org/ontology/ArticleEPrint http://eprints.org/ontology/EPrint Article Academic Article
seeAlso	HTML Summary of #76575 Reliable and Fast DWARF-Based Stack Unwinding
sameAs	Reliable and Fast DWARF-Based Stack Unwinding
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http://eprints.org/ontology/hasPublished	Reliable and Fast DWARF-Based Stack Unwinding (PDF)
dc:hasVersion	Reliable and Fast DWARF-Based Stack Unwinding (PDF) Reliable and Fast DWARF-Based Stack Unwinding (PDF)
Title	Reliable and Fast DWARF-Based Stack Unwinding
described by	https://demo.openlinksw.com/about/id/entity/https/www.cs.kent.ac.uk/people/staff/akj22/materials/CO644/export_kar_RDFN3.n3
Date	2019-10-01
Creator	Théophile Bastian Francesco Zappa Nardelli Stephen Kell
status	peer reviewed published
Publisher	Association for Computing Machinery
abstract	Debug information, usually encoded in the DWARF format, is a hidden and obscure component of our computing infrastructure. Debug information is obviously used by debuggers, but it also plays a key role in program analysis tools, and, most surprisingly, it can be relied upon by the runtime of high-level programming languages. For instance the C++ runtime leverages DWARF stack unwind tables to implement exceptions!Alas, generating debug information adds significant burden to compiler implementations, and the debug information itself can be pervaded by subtle bugs, making the whole infrastructure unreliable. Additionally,interpreting the debug tables is a time-consuming task and, for some applications as sampling profilers, it turns out to be a performance bottleneck.In this paper we focus on the DWARF.eh_frame table, that enables stack unwinding in absence of frame-pointers. We will describe two techniques to perform validation and synthesis of the DWARF stack unwinding tables, and their implementation for the x86_64 architecture. The validation tool has proven effective for compiler and inline assembly testing, while the synthesis tool can generate DWARF unwind tables for arbitrary binaries lacking debug information. Additionally, we report on a technique to precompile unwind tables into native x86_64 code, which we have implemented and integrated into libunwind, resulting in 11x-25xDWARF-based unwind speedups.
Is Part Of	Proceedings of the ACM on Programming Languages https://kar.kent.ac.uk/id/repository
Subject	QA 76 Software, computer programming,
list of authors	https://kar.kent.ac.uk/id/eprint/76575#authors
volume	3
is topic of	https://www.cs.kent.ac.uk/people/staff/akj22/materials/CO644/export_kar_RDFN3.n3
is primary topic of	HTML Summary of #76575 Reliable and Fast DWARF-Based Stack Unwinding

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