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Single-stepping a REP STOS...
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Stigmergy in programming
7 Jul 2022 |
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Ants are known to leave invisible pheromones on their paths in order to inform both themselves and their fellow ants where to go to find food or signal that a path leads to danger. In biology, this phenomenon is known as stigmergy: the act of modifying your environment to manipulate the future behaviour of yourself or others. From the Wikipedia...
Using C-Reduce to debug LaTeX errors
13 Dec 2021 |
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My wife is currently writing her HDR thesis (in France, this is an "accreditation to supervise research"). As part of this, she asked me if it would be possible to split her bibliography into two parts: one containing her own publications and another for the rest of her references. After a tiny bit of searching, I found this stackoverflow answer:...
Compiler fuzzing, part 1
25 Jun 2018 |
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Much has been written about fuzzing compilers already, but there is not a lot that I could find about fuzzing compilers using more modern fuzzing techniques where coverage information is fed back into the fuzzer to find more bugs. If you know me at all, you know I'll throw anything I can get my hands on at AFL. So I tried gcc. (And clang, and...
Writing a reverb filter from first principles
26 Mar 2017 |
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WARNING/DISCLAIMER: Audio programming always carries the risk of damaging your speakers and/or your ears if you make a mistake. Therefore, remember to always turn down the volume completely before and after testing your program. And whatever you do, don't use headphones or earphones. I take no responsibility for damage that may occur as a result...
Fuzzing the OpenSSH daemon using AFL
26 Mar 2017 |
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(EDIT 2017-03-25: All my patches to make OpenSSH more amenable to fuzzing with AFL are available at https://github.com/vegard/openssh-portable. This also includes improvements to the patches found in this post.)American Fuzzy Lop is a great tool. It does take a little bit of extra setup and tweaking if you want to go into advanced usage, but...