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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="A simple `mmap`ed runtime with executable pages."><title>Runtime in juicebox_asm - Rust</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../static.files/SourceSerif4-Regular-46f98efaafac5295.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/SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2"><link rel="stylesheet" href="../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../static.files/rustdoc-ac92e1bbe349e143.css"><meta name="rustdoc-vars" data-root-path="../" data-static-root-path="../static.files/" data-current-crate="juicebox_asm" data-themes="" data-resource-suffix="" data-rustdoc-version="1.76.0 (07dca489a 2024-02-04)" data-channel="1.76.0" data-search-js="search-2b6ce74ff89ae146.js" data-settings-js="settings-4313503d2e1961c2.js" ><script src="../static.files/storage-f2adc0d6ca4d09fb.js"></script><script defer src="sidebar-items.js"></script><script defer src="../static.files/main-305769736d49e732.js"></script><noscript><link rel="stylesheet" href="../static.files/noscript-feafe1bb7466e4bd.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 struct"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="mobile-topbar"><button class="sidebar-menu-toggle">&#9776;</button></nav><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../juicebox_asm/index.html">juicebox_asm</a><span class="version">0.1.0</span></h2></div><h2 class="location"><a href="#">Runtime</a></h2><div class="sidebar-elems"><section><h3><a href="#implementations">Methods</a></h3><ul class="block method"><li><a href="#method.add_code">add_code</a></li><li><a href="#method.dump">dump</a></li><li><a href="#method.new">new</a></li><li><a href="#method.with_profile">with_profile</a></li></ul><h3><a href="#trait-implementations">Trait Implementations</a></h3><ul class="block trait-implementation"><li><a href="#impl-Drop-for-Runtime">Drop</a></li></ul><h3><a href="#synthetic-implementations">Auto Trait Implementations</a></h3><ul class="block synthetic-implementation"><li><a href="#impl-Send-for-Runtime">!Send</a></li><li><a href="#impl-Sync-for-Runtime">!Sync</a></li><li><a href="#impl-RefUnwindSafe-for-Runtime">RefUnwindSafe</a></li><li><a href="#impl-Unpin-for-Runtime">Unpin</a></li><li><a href="#impl-UnwindSafe-for-Runtime">UnwindSafe</a></li></ul><h3><a href="#blanket-implementations">Blanket Implementations</a></h3><ul class="block blanket-implementation"><li><a href="#impl-Any-for-T">Any</a></li><li><a href="#impl-Borrow%3CT%3E-for-T">Borrow&lt;T&gt;</a></li><li><a href="#impl-BorrowMut%3CT%3E-for-T">BorrowMut&lt;T&gt;</a></li><li><a href="#impl-From%3CT%3E-for-T">From&lt;T&gt;</a></li><li><a href="#impl-Into%3CU%3E-for-T">Into&lt;U&gt;</a></li><li><a href="#impl-TryFrom%3CU%3E-for-T">TryFrom&lt;U&gt;</a></li><li><a href="#impl-TryInto%3CU%3E-for-T">TryInto&lt;U&gt;</a></li></ul></section><h2><a href="index.html">In crate juicebox_asm</a></h2></div></nav><div class="sidebar-resizer"></div>
<main><div class="width-limiter"><nav class="sub"><form class="search-form"><span></span><div id="sidebar-button" tabindex="-1"><a href="../juicebox_asm/all.html" title="show sidebar"></a></div><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" tabindex="-1"><a href="../help.html" title="help">?</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-7b819b6101059cd0.svg"></a></div></form></nav><section id="main-content" class="content"><div class="main-heading"><h1>Struct <a href="index.html">juicebox_asm</a>::<wbr><a class="struct" href="#">Runtime</a><button id="copy-path" title="Copy item path to clipboard"><img src="../static.files/clipboard-7571035ce49a181d.svg" width="19" height="18" alt="Copy item path"></button></h1><span class="out-of-band"><a class="src" href="../src/juicebox_asm/rt.rs.html#57-62">source</a> · <button id="toggle-all-docs" title="collapse all docs">[<span>&#x2212;</span>]</button></span></div><pre class="rust item-decl"><code>pub struct Runtime { <span class="comment">/* private fields */</span> }</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>A simple <code>mmap</code>ed runtime with executable pages.</p>
-</div></details><h2 id="implementations" class="section-header">Implementations<a href="#implementations" class="anchor">§</a></h2><div id="implementations-list"><details class="toggle implementors-toggle" open><summary><section id="impl-Runtime" class="impl"><a class="src rightside" href="../src/juicebox_asm/rt.rs.html#64-201">source</a><a href="#impl-Runtime" class="anchor">§</a><h3 class="code-header">impl <a class="struct" href="struct.Runtime.html" title="struct juicebox_asm::Runtime">Runtime</a></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.new" class="method"><a class="src rightside" href="../src/juicebox_asm/rt.rs.html#70-91">source</a><h4 class="code-header">pub fn <a href="#method.new" class="fn">new</a>() -&gt; <a class="struct" href="struct.Runtime.html" title="struct juicebox_asm::Runtime">Runtime</a></h4></section></summary><div class="docblock"><p>Create a new <a href="struct.Runtime.html" title="struct juicebox_asm::Runtime">Runtime</a>.</p>
+</div></details><h2 id="implementations" class="section-header">Implementations<a href="#implementations" class="anchor">§</a></h2><div id="implementations-list"><details class="toggle implementors-toggle" open><summary><section id="impl-Runtime" class="impl"><a class="src rightside" href="../src/juicebox_asm/rt.rs.html#64-210">source</a><a href="#impl-Runtime" class="anchor">§</a><h3 class="code-header">impl <a class="struct" href="struct.Runtime.html" title="struct juicebox_asm::Runtime">Runtime</a></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.new" class="method"><a class="src rightside" href="../src/juicebox_asm/rt.rs.html#70-91">source</a><h4 class="code-header">pub fn <a href="#method.new" class="fn">new</a>() -&gt; <a class="struct" href="struct.Runtime.html" title="struct juicebox_asm::Runtime">Runtime</a></h4></section></summary><div class="docblock"><p>Create a new <a href="struct.Runtime.html" title="struct juicebox_asm::Runtime">Runtime</a>.</p>
<h5 id="panics"><a href="#panics">Panics</a></h5>
<p>Panics if the <code>mmap</code> call fails.</p>
-</div></details><section id="method.with_profile" class="method"><a class="src rightside" href="../src/juicebox_asm/rt.rs.html#93-97">source</a><h4 class="code-header">pub fn <a href="#method.with_profile" class="fn">with_profile</a>() -&gt; <a class="struct" href="struct.Runtime.html" title="struct juicebox_asm::Runtime">Runtime</a></h4></section><details class="toggle method-toggle" open><summary><section id="method.add_code" class="method"><a class="src rightside" href="../src/juicebox_asm/rt.rs.html#120-146">source</a><h4 class="code-header">pub unsafe fn <a href="#method.add_code" class="fn">add_code</a>&lt;F&gt;(&amp;mut self, code: impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.AsRef.html" title="trait core::convert::AsRef">AsRef</a>&lt;[<a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.u8.html">u8</a>]&gt;) -&gt; F</h4></section></summary><div class="docblock"><p>Add the block of <code>code</code> to the runtime and a get function pointer of type <code>F</code>.</p>
+</div></details><details class="toggle method-toggle" open><summary><section id="method.with_profile" class="method"><a class="src rightside" href="../src/juicebox_asm/rt.rs.html#102-106">source</a><h4 class="code-header">pub fn <a href="#method.with_profile" class="fn">with_profile</a>() -&gt; <a class="struct" href="struct.Runtime.html" title="struct juicebox_asm::Runtime">Runtime</a></h4></section></summary><div class="docblock"><p>Create a new <a href="struct.Runtime.html" title="struct juicebox_asm::Runtime">Runtime</a> which also generates static perf metat data.</p>
+<p>For each function added to the <a href="struct.Runtime.html" title="struct juicebox_asm::Runtime">Runtime</a>, an entry will be generated in the
+<code>/tmp/perf-&lt;PID&gt;.map</code> file, which <code>perf report</code> uses to symbolicate unknown addresses.
+This is applicable for static runtimes only.</p>
<h5 id="panics-1"><a href="#panics-1">Panics</a></h5>
+<p>Panics if the <code>mmap</code> call fails.</p>
+</div></details><details class="toggle method-toggle" open><summary><section id="method.add_code" class="method"><a class="src rightside" href="../src/juicebox_asm/rt.rs.html#129-155">source</a><h4 class="code-header">pub unsafe fn <a href="#method.add_code" class="fn">add_code</a>&lt;F&gt;(&amp;mut self, code: impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/convert/trait.AsRef.html" title="trait core::convert::AsRef">AsRef</a>&lt;[<a class="primitive" href="https://doc.rust-lang.org/1.76.0/std/primitive.u8.html">u8</a>]&gt;) -&gt; F</h4></section></summary><div class="docblock"><p>Add the block of <code>code</code> to the runtime and a get function pointer of type <code>F</code>.</p>
+<h5 id="panics-2"><a href="#panics-2">Panics</a></h5>
<p>Panics if the <code>code</code> does not fit on the <code>mmap</code>ed pages or is empty.</p>
<h5 id="safety"><a href="#safety">Safety</a></h5>
<p>The code added must fulfill the ABI of the specified function <code>F</code> and the returned function
@@ -16,14 +22,14 @@ pointer is only valid until the <a href="struct.Runtime.html" title="struct juic
<span class="kw">let </span>nop = <span class="kw">unsafe </span>{ rt.add_code::&lt;<span class="kw">extern </span><span class="string">"C" </span><span class="kw">fn</span>()&gt;(<span class="kw-2">&amp;</span>code) };
nop();</code></pre></div>
-</div></details><details class="toggle method-toggle" open><summary><section id="method.dump" class="method"><a class="src rightside" href="../src/juicebox_asm/rt.rs.html#160-164">source</a><h4 class="code-header">pub fn <a href="#method.dump" class="fn">dump</a>(&amp;self)</h4></section></summary><div class="docblock"><p>Dump the code added so far to the runtime into a file called <code>jit.asm</code> in the processes
+</div></details><details class="toggle method-toggle" open><summary><section id="method.dump" class="method"><a class="src rightside" href="../src/juicebox_asm/rt.rs.html#169-173">source</a><h4 class="code-header">pub fn <a href="#method.dump" class="fn">dump</a>(&amp;self)</h4></section></summary><div class="docblock"><p>Dump the code added so far to the runtime into a file called <code>jit.asm</code> in the processes
current working directory.</p>
<p>The code can be inspected with a disassembler as for example <code>ndiasm</code> from
<a href="https://nasm.us/index.php">nasm.us</a>.</p>
<div class="example-wrap"><pre class="language-sh"><code>ndisasm -b 64 jit.asm
-</code></pre></div><h5 id="panics-2"><a href="#panics-2">Panics</a></h5>
+</code></pre></div><h5 id="panics-3"><a href="#panics-3">Panics</a></h5>
<p>Panics if writing the file failed.</p>
-</div></details></div></details></div><h2 id="trait-implementations" class="section-header">Trait Implementations<a href="#trait-implementations" class="anchor">§</a></h2><div id="trait-implementations-list"><details class="toggle implementors-toggle" open><summary><section id="impl-Drop-for-Runtime" class="impl"><a class="src rightside" href="../src/juicebox_asm/rt.rs.html#203-211">source</a><a href="#impl-Drop-for-Runtime" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/ops/drop/trait.Drop.html" title="trait core::ops::drop::Drop">Drop</a> for <a class="struct" href="struct.Runtime.html" title="struct juicebox_asm::Runtime">Runtime</a></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.drop" class="method trait-impl"><a class="src rightside" href="../src/juicebox_asm/rt.rs.html#206-210">source</a><a href="#method.drop" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/ops/drop/trait.Drop.html#tymethod.drop" class="fn">drop</a>(&amp;mut self)</h4></section></summary><div class="docblock"><p>Unmaps the code page. This invalidates all the function pointer returned by
+</div></details></div></details></div><h2 id="trait-implementations" class="section-header">Trait Implementations<a href="#trait-implementations" class="anchor">§</a></h2><div id="trait-implementations-list"><details class="toggle implementors-toggle" open><summary><section id="impl-Drop-for-Runtime" class="impl"><a class="src rightside" href="../src/juicebox_asm/rt.rs.html#212-220">source</a><a href="#impl-Drop-for-Runtime" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/ops/drop/trait.Drop.html" title="trait core::ops::drop::Drop">Drop</a> for <a class="struct" href="struct.Runtime.html" title="struct juicebox_asm::Runtime">Runtime</a></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.drop" class="method trait-impl"><a class="src rightside" href="../src/juicebox_asm/rt.rs.html#215-219">source</a><a href="#method.drop" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/ops/drop/trait.Drop.html#tymethod.drop" class="fn">drop</a>(&amp;mut self)</h4></section></summary><div class="docblock"><p>Unmaps the code page. This invalidates all the function pointer returned by
<a href="struct.Runtime.html#method.add_code" title="method juicebox_asm::Runtime::add_code"><code>Runtime::add_code</code></a>.</p>
</div></details></div></details></div><h2 id="synthetic-implementations" class="section-header">Auto Trait Implementations<a href="#synthetic-implementations" class="anchor">§</a></h2><div id="synthetic-implementations-list"><section id="impl-RefUnwindSafe-for-Runtime" class="impl"><a href="#impl-RefUnwindSafe-for-Runtime" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/panic/unwind_safe/trait.RefUnwindSafe.html" title="trait core::panic::unwind_safe::RefUnwindSafe">RefUnwindSafe</a> for <a class="struct" href="struct.Runtime.html" title="struct juicebox_asm::Runtime">Runtime</a></h3></section><section id="impl-Send-for-Runtime" class="impl"><a href="#impl-Send-for-Runtime" class="anchor">§</a><h3 class="code-header">impl !<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Send.html" title="trait core::marker::Send">Send</a> for <a class="struct" href="struct.Runtime.html" title="struct juicebox_asm::Runtime">Runtime</a></h3></section><section id="impl-Sync-for-Runtime" class="impl"><a href="#impl-Sync-for-Runtime" class="anchor">§</a><h3 class="code-header">impl !<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sync.html" title="trait core::marker::Sync">Sync</a> for <a class="struct" href="struct.Runtime.html" title="struct juicebox_asm::Runtime">Runtime</a></h3></section><section id="impl-Unpin-for-Runtime" class="impl"><a href="#impl-Unpin-for-Runtime" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Unpin.html" title="trait core::marker::Unpin">Unpin</a> for <a class="struct" href="struct.Runtime.html" title="struct juicebox_asm::Runtime">Runtime</a></h3></section><section id="impl-UnwindSafe-for-Runtime" class="impl"><a href="#impl-UnwindSafe-for-Runtime" class="anchor">§</a><h3 class="code-header">impl <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/panic/unwind_safe/trait.UnwindSafe.html" title="trait core::panic::unwind_safe::UnwindSafe">UnwindSafe</a> for <a class="struct" href="struct.Runtime.html" title="struct juicebox_asm::Runtime">Runtime</a></h3></section></div><h2 id="blanket-implementations" class="section-header">Blanket Implementations<a href="#blanket-implementations" class="anchor">§</a></h2><div id="blanket-implementations-list"><details class="toggle implementors-toggle"><summary><section id="impl-Any-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/any.rs.html#140">source</a><a href="#impl-Any-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/any/trait.Any.html" title="trait core::any::Any">Any</a> for T<div class="where">where
T: 'static + ?<a class="trait" href="https://doc.rust-lang.org/1.76.0/core/marker/trait.Sized.html" title="trait core::marker::Sized">Sized</a>,</div></h3></section></summary><div class="impl-items"><details class="toggle method-toggle" open><summary><section id="method.type_id" class="method trait-impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/any.rs.html#141">source</a><a href="#method.type_id" class="anchor">§</a><h4 class="code-header">fn <a href="https://doc.rust-lang.org/1.76.0/core/any/trait.Any.html#tymethod.type_id" class="fn">type_id</a>(&amp;self) -&gt; <a class="struct" href="https://doc.rust-lang.org/1.76.0/core/any/struct.TypeId.html" title="struct core::any::TypeId">TypeId</a></h4></section></summary><div class='docblock'>Gets the <code>TypeId</code> of <code>self</code>. <a href="https://doc.rust-lang.org/1.76.0/core/any/trait.Any.html#tymethod.type_id">Read more</a></div></details></div></details><details class="toggle implementors-toggle"><summary><section id="impl-Borrow%3CT%3E-for-T" class="impl"><a class="src rightside" href="https://doc.rust-lang.org/1.76.0/src/core/borrow.rs.html#208">source</a><a href="#impl-Borrow%3CT%3E-for-T" class="anchor">§</a><h3 class="code-header">impl&lt;T&gt; <a class="trait" href="https://doc.rust-lang.org/1.76.0/core/borrow/trait.Borrow.html" title="trait core::borrow::Borrow">Borrow</a>&lt;T&gt; for T<div class="where">where