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A new builder describes a complete Linux void. Methods allow you to make it less of a void as you see fit. This aligns well with the structure in the write up. Creating a void first then adding only precisely what is needed to it. It&rsquo;s also a much higher level API that&rsquo;s object oriented."><meta name=author content="Jake Hillion"><link rel=canonical href=https://blog.hillion.co.uk/posts/weekly-2022-03-28/><link crossorigin=anonymous href=/assets/css/stylesheet.min.48a18943c2fc15c38a372b8dde1f5e5dc0bc64fa6cb90f5a817d2f8c76b7f3ae.css integrity="sha256-SKGJQ8L8FcOKNyuN3h9eXcC8ZPpsuQ9agX0vjHa3864=" rel="preload stylesheet" as=style><script defer crossorigin=anonymous src=/assets/js/highlight.min.b95bacdc39e37a332a9f883b1e78be4abc1fdca2bc1f2641f55e3cd3dabd4d61.js integrity="sha256-uVus3DnjejMqn4g7Hni+Srwf3KK8HyZB9V4809q9TWE=" onload=hljs.initHighlightingOnLoad()></script>
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A new builder describes a complete Linux void. Methods allow you to make it less of a void as you see fit. This aligns well with the structure in the write up. Creating a void first then adding only precisely what is needed to it. It&rsquo;s also a much higher level API that&rsquo;s object oriented."><meta property="og:type" content="article"><meta property="og:url" content="https://blog.hillion.co.uk/posts/weekly-2022-03-28/"><meta property="article:section" content="posts"><meta property="article:published_time" content="2022-03-28T11:00:00+00:00"><meta property="article:modified_time" content="2022-03-28T11:00:00+00:00"><meta property="og:site_name" content="Jake Hillion"><meta name=twitter:card content="summary"><meta name=twitter:title content="Jake's Weekly - 28th March 2022"><meta name=twitter:description content="Research Project Programming Built a new VoidBuilder struct to better align with how creating a void is described in the writing (void.rs).
A new builder describes a complete Linux void. Methods allow you to make it less of a void as you see fit. This aligns well with the structure in the write up. Creating a void first then adding only precisely what is needed to it. It&rsquo;s also a much higher level API that&rsquo;s object oriented."><script type=application/ld+json>{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Posts","item":"https://blog.hillion.co.uk/posts/"},{"@type":"ListItem","position":2,"name":"Jake's Weekly - 28th March 2022","item":"https://blog.hillion.co.uk/posts/weekly-2022-03-28/"}]}</script><script type=application/ld+json>{"@context":"https://schema.org","@type":"BlogPosting","headline":"Jake's Weekly - 28th March 2022","name":"Jake\u0027s Weekly - 28th March 2022","description":"Research Project Programming Built a new VoidBuilder struct to better align with how creating a void is described in the writing (void.rs).\nA new builder describes a complete Linux void. Methods allow you to make it less of a void as you see fit. This aligns well with the structure in the write up. Creating a void first then adding only precisely what is needed to it. It\u0026rsquo;s also a much higher level API that\u0026rsquo;s object oriented.","keywords":[],"articleBody":"Research Project Programming Built a new VoidBuilder struct to better align with how creating a void is described in the writing (void.rs).\nA new builder describes a complete Linux void. Methods allow you to make it less of a void as you see fit. This aligns well with the structure in the write up. Creating a void first then adding only precisely what is needed to it. Its also a much higher level API thats object oriented. Takes a closure and is easier to reason about than the previous imperative code. Leaves room for optimisations such as sharing an empty namespace in the future. Cleaned up clone3 to better use stack arguments (clone.rs).\nPreviously there were some hidden fields in the input argument. In hindsight these should clearly be on the functions stack. Solved the file dropping problem.\nCombined this with the new VoidBuilder. As it takes a closure rather than control flow, the closure can simply not be dropped in the parent (void.rs#L55-L60). Anything that has been moved into the closure will now only be dropped in the spawned process - probably the intended behaviour. Kind of messy if youve allocated memory to be moved into the closure, but a nice solution for things like Files which only live on the stack but hold a resource. Added CI (Drone).\nBenchmarked creating namespaces (benches/clone3.rs). This was initially working quite well but seems to be hitting some limits now. Will need a bit of debugging. Im still deciding whether to switch to a Jupyter Notebook for this sort of thing, or leave it in Rust/scripts.\nDissertation draft Less obvious progress this time. Ive been writing about the features as Ive been writing the code, so sections like how to create a void have grown quite nicely. I wont attach a new copy here but the Overleaf link is still valid.\nUp Next The code is in a much better spot now than it was last time. The goal for the next week is to get the example applications completed under this near to final shim.\nAdd the needed handling to gzip to run under the shim.\nEdit the source. Write a specification. Write about it in the write up. Create a decent explanatory figure. Build a TLS server in Rust under the shim.\nWrite the server. Write a specification. Write about it in the write up. Create a decent explanatory figure. Extension: finish the macros for better integration with Rust.\nWrite the helper functions alongside the TLS server. Design the macros alongside the TLS server. Write the macros once its already working without. ","wordCount":"432","inLanguage":"en","datePublished":"2022-03-28T11:00:00Z","dateModified":"2022-03-28T11:00:00Z","author":{"@type":"Person","name":"Jake Hillion"},"mainEntityOfPage":{"@type":"WebPage","@id":"https://blog.hillion.co.uk/posts/weekly-2022-03-28/"},"publisher":{"@type":"Organization","name":"Jake Hillion","logo":{"@type":"ImageObject","url":"https://blog.hillion.co.uk/favicon.ico"}}}</script></head><body id=top><script>localStorage.getItem("pref-theme")==="dark"?document.body.classList.add("dark"):localStorage.getItem("pref-theme")==="light"?document.body.classList.remove("dark"):window.matchMedia("(prefers-color-scheme: dark)").matches&&document.body.classList.add("dark")</script><header class=header><nav class=nav><div class=logo><a href=https://blog.hillion.co.uk/ accesskey=h title="Jake Hillion (Alt + H)">Jake Hillion</a>
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Methods allow you to make it less of a void as you see fit.</li><li>This aligns well with the structure in the write up. Creating a void first then adding only precisely what is needed to it.</li><li>It&rsquo;s also a much higher level API that&rsquo;s object oriented. Takes a closure and is easier to reason about than the previous imperative code.</li><li>Leaves room for optimisations such as sharing an empty namespace in the future.</li></ul></li><li><p>Cleaned up <code>clone3</code> to better use stack arguments (<a href=https://gitea.hillion.co.uk/JakeHillion/clone-shim/commit/fe05cf1fef8c4fd2d1fc0f4a1126fa74f9eda6bf>clone.rs</a>).</p><ul><li>Previously there were some hidden fields in the input argument. In hindsight these should clearly be on the function&rsquo;s stack.</li></ul></li><li><p>Solved the file dropping problem.</p><ul><li>Combined this with the new <code>VoidBuilder</code>. As it takes a closure rather than control flow, the closure can simply not be dropped in the parent (<a href=https://gitea.hillion.co.uk/JakeHillion/clone-shim/src/commit/23f5761d05f65cc4d6f8d0388ea72cec30ea5ed2/src/void.rs#L55-L60>void.rs#L55-L60</a>).</li><li>Anything that has been moved into the closure will now only be dropped in the spawned process - probably the intended behaviour. Kind of messy if you&rsquo;ve allocated memory to be moved into the closure, but a nice solution for things like <code>File</code>s which only live on the stack but hold a resource.</li></ul></li><li><p>Added CI (<a href=https://drone.hillion.co.uk/JakeHillion/clone-shim>Drone</a>).</p></li><li><p>Benchmarked creating namespaces (<a href=https://gitea.hillion.co.uk/JakeHillion/clone-shim/src/commit/23f5761d05f65cc4d6f8d0388ea72cec30ea5ed2/benches/clone3.rs>benches/clone3.rs</a>). This was initially working quite well but seems to be hitting some limits now. Will need a bit of debugging. I&rsquo;m still deciding whether to switch to a Jupyter Notebook for this sort of thing, or leave it in Rust/scripts.</p></li></ul><h3 id=dissertation-draft>Dissertation draft<a hidden class=anchor aria-hidden=true href=#dissertation-draft>#</a></h3><p>Less obvious progress this time. I&rsquo;ve been writing about the features as I&rsquo;ve been writing the code, so sections like how to create a void have grown quite nicely. I won&rsquo;t attach a new copy here but the <a href=https://www.overleaf.com/project/6227c8e96fcdc06e56454f24>Overleaf link</a> is still valid.</p><h3 id=up-next>Up Next<a hidden class=anchor aria-hidden=true href=#up-next>#</a></h3><p>The code is in a much better spot now than it was last time. The goal for the next week is to get the example applications completed under this near to final shim.</p><ul><li><p>Add the needed handling to <code>gzip</code> to run under the shim.</p><ul><li>Edit the source.</li><li>Write a specification.</li><li>Write about it in the write up.</li><li>Create a decent explanatory figure.</li></ul></li><li><p>Build a TLS server in Rust under the shim.</p><ul><li>Write the server.</li><li>Write a specification.</li><li>Write about it in the write up.</li><li>Create a decent explanatory figure.</li></ul></li><li><p>Extension: finish the macros for better integration with Rust.</p><ul><li>Write the helper functions alongside the TLS server.</li><li>Design the macros alongside the TLS server.</li><li>Write the macros once it&rsquo;s already working without.</li></ul></li></ul></div><footer class=post-footer><nav class=paginav><a class=prev href=https://blog.hillion.co.uk/posts/weekly-2022-04-25/><span class=title>« Prev Page</span><br><span>Jake's Weekly - 25th April 2022</span></a>
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