Writing a C compiler in 500 lines of Python
A few months ago, I set myself the challenge of writing a C compiler in 500 lines of Python1, after writing my SDF donut post. How hard could it be? The answer was, pretty hard, even when dropping quite a few features. But it was also pretty interesting, and the result is surprisingly functional and not too hard to understand! There's too much code for me to comprehensively cover in a single blog
angr例文集 書いて覚えるバイナリ自動解析技術 - Qiita
これはなに 昨今、DARPA CGC始めネイティブバイナリを対象とした脆弱性自動解析技術はますます進歩の一途を辿っているが、あまりにも急激に進歩するため実際のユースケースやドキュメントが追従できてない様に思う。そのためangrやS2E、Drillerといった基礎ツールを使いこなすまでの壁が高く、何だかんだしてるうちにまた次の研究が登場してしまうといった始末。まあアカデミアのstate-of-artsなんでそんな物だと思うけどもうちょっとマシなTipsは無いのか。 まあ無いなら書いてみるか。って事でコードスニペット集みたいな記事を作ってみた。7割ぐらい自分のメモ目的だけど、まあ研究やら趣味活動やらでオレオレスクリプトコードが溜まってるので汎用的なやつは放出してみる。 今回はangrのスクリプト集。何か新しく書いたら適時更新して行くと思う。あくまで基本を理解してる人向けのTips集。多分研究者
Apache2 Ubuntu Default Page: It works
This is the default welcome page used to test the correct operation of the Apache2 server after installation on Ubuntu systems. It is based on the equivalent page on Debian, from which the Ubuntu Apache packaging is derived. If you can read this page, it means that the Apache HTTP server installed at this site is working properly. You should replace this file (located at /var/www/html/index.html)
Beautiful Native Libraries
Beautiful Native Libraries written on Sunday, August 18, 2013 I'm obsessed with nice APIs. Not just APIs however, also in making the overall experience of using a library as good as possible. For Python there are quite a few best practices around by now but it feels like there is not really a lot of information available about how to properly structure a native library. What do I mean by native li
Analyzing Python C Extensions With CPyChecker
Writing C extension modules for Python is tricky: the programmer must manually manage reference counts and the exception state, in addition to the usual dangers of coding in C. CPyChecker is a new static checker being developed by David Malcom to rescue us from our mistakes. I was introduced to it at PyCon when Malcolm gave his Death By A Thousand Leaks talk. The tool is work in progress, buggy an
LTSV パーサを書いた - Memo
Python の C 言語の拡張で書いてみた(Python2 系でしか動かないはず)。 GitHub - heavenshell/py-pyltsv: Dead simple LTSV parser written in Python C extension 最初 Pure Python で書いてたけど既に作られてたので、どうせならと勉強の意味も兼ねて C 言語の拡張として作ってみた。 LTSV な行とファイルのパースしかできない。 機能は足らないけど、Pure Python で書いた場合のより速度が出てるはず。 # -*- coding: utf-8 -*- def parse_line(string): line = string.decode('utf-8').rstrip() return dict([x.split(':', 1) for x in line.split("\t"
eliben / pycparser — Bitbucket
1.1 What is pycparser? pycparser is a parser for the C language, written in pure Python. It is a module designed to be easily integrated into applications that need to parse C source code. 1.2 What is it good for? Anything that needs C code to be parsed. The following are some uses for pycparser, taken from real user reports: C code obfuscator Front-end for various specialized C compilers Stat
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GitHub - bourguet/operator_precedence_parsing: C89 expressions parsed with the shunting yard algorithm in Python
実践 C 拡張モジュール開発
pycparser v2.10 released - Eli Bendersky's website
Speeding Up Your Python Code - Max Burstein's Blog