From 872cf6d06f4d77637b4627fdc583bab79ee2372f Mon Sep 17 00:00:00 2001
From: johannst <johannst@users.noreply.github.com>
Date: Mon, 27 Feb 2023 22:52:40 +0000
Subject: deploy: 6486b862edc2750dba83848f62d6c9f3d4c6d3c2

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+<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `src/rt.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>rt.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceSerif4-Regular-1f7d512b176f0f72.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/FiraSans-Regular-018c141bf0843ffd.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/FiraSans-Medium-8f9a781e4970d388.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceSerif4-Bold-124a1ca42af929b6.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2"><link rel="stylesheet" href="../../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../../static.files/rustdoc-6827029ac823cab7.css" id="mainThemeStyle"><link rel="stylesheet" id="themeStyle" href="../../static.files/light-ebce58d0a40c3431.css"><link rel="stylesheet" disabled href="../../static.files/dark-f23faae4a2daf9a6.css"><link rel="stylesheet" disabled href="../../static.files/ayu-8af5e100b21cd173.css"><script id="default-settings" ></script><script src="../../static.files/storage-d43fa987303ecbbb.js"></script><script defer src="../../static.files/source-script-5cf2e01a42cc9858.js"></script><script defer src="../../source-files.js"></script><script defer src="../../static.files/main-c55e1eb52e1886b4.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-13285aec31fa243e.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-16x16-8b506e7a72182f1c.png"><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-422f7d1d52889060.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-2c020d218678b618.svg"></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"></nav><main><div class="width-limiter"><nav class="sub"><a class="sub-logo-container" href="../../juicebox_asm/index.html"><img class="rust-logo" src="../../static.files/rust-logo-151179464ae7ed46.svg" alt="logo"></a><form class="search-form"><span></span><input class="search-input" name="search" aria-label="Run search in the documentation" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><div id="help-button" title="help" tabindex="-1"><a href="../../help.html">?</a></div><div id="settings-menu" tabindex="-1"><a href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../static.files/wheel-5ec35bf9ca753509.svg"></a></div></form></nav><section id="main-content" class="content"><div class="example-wrap"><pre class="src-line-numbers"><a href="#1" id="1">1</a>
+<a href="#2" id="2">2</a>
+<a href="#3" id="3">3</a>
+<a href="#4" id="4">4</a>
+<a href="#5" id="5">5</a>
+<a href="#6" id="6">6</a>
+<a href="#7" id="7">7</a>
+<a href="#8" id="8">8</a>
+<a href="#9" id="9">9</a>
+<a href="#10" id="10">10</a>
+<a href="#11" id="11">11</a>
+<a href="#12" id="12">12</a>
+<a href="#13" id="13">13</a>
+<a href="#14" id="14">14</a>
+<a href="#15" id="15">15</a>
+<a href="#16" id="16">16</a>
+<a href="#17" id="17">17</a>
+<a href="#18" id="18">18</a>
+<a href="#19" id="19">19</a>
+<a href="#20" id="20">20</a>
+<a href="#21" id="21">21</a>
+<a href="#22" id="22">22</a>
+<a href="#23" id="23">23</a>
+<a href="#24" id="24">24</a>
+<a href="#25" id="25">25</a>
+<a href="#26" id="26">26</a>
+<a href="#27" id="27">27</a>
+<a href="#28" id="28">28</a>
+<a href="#29" id="29">29</a>
+<a href="#30" id="30">30</a>
+<a href="#31" id="31">31</a>
+<a href="#32" id="32">32</a>
+<a href="#33" id="33">33</a>
+<a href="#34" id="34">34</a>
+<a href="#35" id="35">35</a>
+<a href="#36" id="36">36</a>
+<a href="#37" id="37">37</a>
+<a href="#38" id="38">38</a>
+<a href="#39" id="39">39</a>
+<a href="#40" id="40">40</a>
+<a href="#41" id="41">41</a>
+<a href="#42" id="42">42</a>
+<a href="#43" id="43">43</a>
+<a href="#44" id="44">44</a>
+<a href="#45" id="45">45</a>
+<a href="#46" id="46">46</a>
+<a href="#47" id="47">47</a>
+<a href="#48" id="48">48</a>
+<a href="#49" id="49">49</a>
+<a href="#50" id="50">50</a>
+<a href="#51" id="51">51</a>
+</pre><pre class="rust"><code><span class="kw">use </span>core::ffi::c_void;
+<span class="kw">use </span>nix::sys::mman::{mmap, munmap, MapFlags, ProtFlags};
+
+<span class="doccomment">/// A simple `mmap`ed runtime with executable pages.
+</span><span class="kw">pub struct </span>Runtime {
+    buf: <span class="kw-2">*mut </span>c_void,
+    len: usize,
+}
+
+<span class="kw">impl </span>Runtime {
+    <span class="doccomment">/// Create a new [Runtime].
+    </span><span class="kw">pub fn </span>new(code: <span class="kw-2">&amp;</span>[u8]) -&gt; Runtime {
+        <span class="comment">// Allocate a single page.
+        </span><span class="kw">let </span>len = core::num::NonZeroUsize::new(<span class="number">4096</span>).unwrap();
+        <span class="kw">let </span>buf = <span class="kw">unsafe </span>{
+            mmap(
+                <span class="prelude-val">None</span>,
+                len,
+                ProtFlags::PROT_WRITE | ProtFlags::PROT_READ | ProtFlags::PROT_EXEC,
+                MapFlags::MAP_PRIVATE | MapFlags::MAP_ANONYMOUS,
+                <span class="number">0</span>, <span class="comment">/* fd */
+                </span><span class="number">0</span>, <span class="comment">/* off */
+            </span>)
+            .unwrap()
+        };
+        {
+            <span class="comment">// Copy over code.
+            </span><span class="macro">assert!</span>(code.len() &lt; len.get());
+            <span class="kw">unsafe </span>{ std::ptr::copy_nonoverlapping(code.as_ptr(), buf.cast(), len.get()) };
+        }
+
+        Runtime {
+            buf,
+            len: len.get(),
+        }
+    }
+
+    <span class="doccomment">/// Reinterpret the block of code as `F`.
+    </span><span class="attr">#[inline]
+    </span><span class="kw">pub unsafe fn </span>as_fn&lt;F&gt;(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; F {
+        <span class="kw">unsafe </span>{ std::mem::transmute_copy(<span class="kw-2">&amp;</span><span class="self">self</span>.buf) }
+    }
+}
+
+<span class="kw">impl </span>Drop <span class="kw">for </span>Runtime {
+    <span class="kw">fn </span>drop(<span class="kw-2">&amp;mut </span><span class="self">self</span>) {
+        <span class="kw">unsafe </span>{
+            munmap(<span class="self">self</span>.buf, <span class="self">self</span>.len).expect(<span class="string">&quot;Failed to munmap Runtime&quot;</span>);
+        }
+    }
+}
+</code></pre></div>
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