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<!doctype html><html lang=en dir=auto><head><meta charset=utf-8><meta http-equiv=x-ua-compatible content="IE=edge"><meta name=viewport content="width=device-width,initial-scale=1,shrink-to-fit=no"><meta name=robots content="index, follow"><title>Posts | Jake Hillion</title><meta name=keywords content><meta name=description content="Posts - Jake Hillion"><meta name=author content="Jake Hillion"><link rel=canonical href=https://blog.hillion.co.uk/posts/><link crossorigin=anonymous href=/assets/css/stylesheet.min.48a18943c2fc15c38a372b8dde1f5e5dc0bc64fa6cb90f5a817d2f8c76b7f3ae.css integrity="sha256-SKGJQ8L8FcOKNyuN3h9eXcC8ZPpsuQ9agX0vjHa3864=" rel="preload stylesheet" as=style><link rel=icon href=https://blog.hillion.co.uk/favicon.ico><link rel=icon type=image/png sizes=16x16 href=https://blog.hillion.co.uk/favicon-16x16.png><link rel=icon type=image/png sizes=32x32 href=https://blog.hillion.co.uk/favicon-32x32.png><link rel=apple-touch-icon href=https://blog.hillion.co.uk/apple-touch-icon.png><link rel=mask-icon href=https://blog.hillion.co.uk/safari-pinned-tab.svg><meta name=theme-color content="#2e2e33"><meta name=msapplication-TileColor content="#2e2e33"><link rel=alternate type=application/rss+xml href=https://blog.hillion.co.uk/posts/index.xml><noscript><style>#theme-toggle,.top-link{display:none}</style><style>@media(prefers-color-scheme:dark){:root{--theme:rgb(29, 30, 32);--entry:rgb(46, 46, 51);--primary:rgb(218, 218, 219);--secondary:rgb(155, 156, 157);--tertiary:rgb(65, 66, 68);--content:rgb(196, 196, 197);--hljs-bg:rgb(46, 46, 51);--code-bg:rgb(55, 56, 62);--border:rgb(51, 51, 51)}.list{background:var(--theme)}.list:not(.dark)::-webkit-scrollbar-track{background:0 0}.list:not(.dark)::-webkit-scrollbar-thumb{border-color:var(--theme)}}</style></noscript><script async src="https://www.googletagmanager.com/gtag/js?id=G-4CXXF49E7M"></script>
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<span class=logo-switches><button id=theme-toggle accesskey=t title="(Alt + T)"><svg id="moon" xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentcolor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M21 12.79A9 9 0 1111.21 3 7 7 0 0021 12.79z"/></svg><svg id="sun" xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentcolor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><circle cx="12" cy="12" r="5"/><line x1="12" y1="1" x2="12" y2="3"/><line x1="12" y1="21" x2="12" y2="23"/><line x1="4.22" y1="4.22" x2="5.64" y2="5.64"/><line x1="18.36" y1="18.36" x2="19.78" y2="19.78"/><line x1="1" y1="12" x2="3" y2="12"/><line x1="21" y1="12" x2="23" y2="12"/><line x1="4.22" y1="19.78" x2="5.64" y2="18.36"/><line x1="18.36" y1="5.64" x2="19.78" y2="4.22"/></svg></button></span></div><ul id=menu><li><a href=https://blog.hillion.co.uk/categories/ title=categories><span>categories</span></a></li><li><a href=https://blog.hillion.co.uk/tags/ title=tags><span>tags</span></a></li></ul></nav></header><main class=main><header class=page-header><div class=breadcrumbs><a href=https://blog.hillion.co.uk/>Home</a></div><h1>Posts</h1></header><article class=post-entry><header class=entry-header><h2>Jake's Weekly - 17th Jan 2022</h2></header><section class=entry-content><p>Research Project Process Isolation Wrote an OCaml binding for the clone3 syscall (clone_shim.ml/clone3_stub.c).
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Some decisions made to make this feel a bit higher level: List of flags rather than ORed together numbers. Options used where helpful. Looked into using an OCaml callback, but of course this doesn’t work (as expected - OCaml didn’t like Multicore!). Currently execve’s a specific binary (/bin/sh), but should be easy to extend. Tricky to know sometimes what to put in C and what to put in OCaml....</p></section><footer class=entry-footer><span title='2022-01-15 11:00:00 +0000 UTC'>January 15, 2022</span> · 3 min · Jake Hillion</footer><a class=entry-link aria-label="post link to Jake's Weekly - 17th Jan 2022" href=https://blog.hillion.co.uk/posts/weekly-2022-01-17/></a></article><article class=post-entry><header class=entry-header><h2>Jake's Weekly - 3rd Jan 2022</h2></header><section class=entry-content><p>Research Project Process Isolation Setup a Fedora testing VM for easier and consistent testing.
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Fedora 35 uses pure cgroups2 by default - very useful! Sorted out backups for the repo and the above machine. Chose a testing framework for C enabling testing of the assertions to build the project upon.
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Used Unity. Simple and the examples show that it doesn’t do much beyond the minimum - important for this low level code with syscalls....</p></section><footer class=entry-footer><span title='2022-01-01 11:00:00 +0000 UTC'>January 1, 2022</span> · 5 min · Jake Hillion</footer><a class=entry-link aria-label="post link to Jake's Weekly - 3rd Jan 2022" href=https://blog.hillion.co.uk/posts/weekly-2022-01-03/></a></article><footer class=page-footer><nav class=pagination><a class=prev href=https://blog.hillion.co.uk/posts/page/2/>« Prev Page</a></nav></footer></main><footer class=footer><span>© 2024 <a href=https://blog.hillion.co.uk/>Jake Hillion</a></span>
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