<!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 to the Rust file `libstd/sys/unix/backtrace/printing/dladdr.rs`."> <meta name="keywords" content="rust, rustlang, rust-lang"> <title>dladdr.rs.html -- source</title> <link rel="stylesheet" type="text/css" href="../../../../../../normalize.css"> <link rel="stylesheet" type="text/css" href="../../../../../../rustdoc.css" id="mainThemeStyle"> <link rel="stylesheet" type="text/css" href="../../../../../../dark.css"> <link rel="stylesheet" type="text/css" href="../../../../../../main.css" id="themeStyle"> <script src="../../../../../../storage.js"></script> <link rel="shortcut icon" href="https://doc.rust-lang.org/favicon.ico"> </head> <body class="rustdoc source"> <!--[if lte IE 8]> <div class="warning"> This old browser is unsupported and will most likely display funky things. </div> <![endif]--> <nav class="sidebar"> <div class="sidebar-menu">☰</div> <a href='../../../../../../std/index.html'><img src='https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png' alt='logo' width='100'></a> </nav> <div class="theme-picker"> <button id="theme-picker" aria-label="Pick another theme!"> <img src="../../../../../../brush.svg" width="18" alt="Pick another theme!"> </button> <div id="theme-choices"></div> </div> <script src="../../../../../../theme.js"></script> <nav class="sub"> <form class="search-form js-only"> <div class="search-container"> <input class="search-input" name="search" autocomplete="off" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"> </div> </form> </nav> <section id='main' class="content"><pre class="line-numbers"><span id="1"> 1</span> <span id="2"> 2</span> <span id="3"> 3</span> <span id="4"> 4</span> <span id="5"> 5</span> <span id="6"> 6</span> <span id="7"> 7</span> <span id="8"> 8</span> <span id="9"> 9</span> <span id="10">10</span> <span id="11">11</span> <span id="12">12</span> <span id="13">13</span> <span id="14">14</span> <span id="15">15</span> <span id="16">16</span> <span id="17">17</span> <span id="18">18</span> <span id="19">19</span> <span id="20">20</span> <span id="21">21</span> <span id="22">22</span> <span id="23">23</span> <span id="24">24</span> <span id="25">25</span> <span id="26">26</span> <span id="27">27</span> <span id="28">28</span> <span id="29">29</span> <span id="30">30</span> <span id="31">31</span> <span id="32">32</span> <span id="33">33</span> <span id="34">34</span> <span id="35">35</span> <span id="36">36</span> <span id="37">37</span> <span id="38">38</span> <span id="39">39</span> <span id="40">40</span> <span id="41">41</span> <span id="42">42</span> <span id="43">43</span> <span id="44">44</span> <span id="45">45</span> </pre><pre class="rust "> <span class="comment">// Copyright 2014-2015 The Rust Project Developers. See the COPYRIGHT</span> <span class="comment">// file at the top-level directory of this distribution and at</span> <span class="comment">// http://rust-lang.org/COPYRIGHT.</span> <span class="comment">//</span> <span class="comment">// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or</span> <span class="comment">// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license</span> <span class="comment">// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your</span> <span class="comment">// option. This file may not be copied, modified, or distributed</span> <span class="comment">// except according to those terms.</span> <span class="kw">use</span> <span class="ident">io</span>; <span class="kw">use</span> <span class="ident">intrinsics</span>; <span class="kw">use</span> <span class="ident">ffi</span>::<span class="ident">CStr</span>; <span class="kw">use</span> <span class="ident">libc</span>; <span class="kw">use</span> <span class="ident">sys</span>::<span class="ident">backtrace</span>::<span class="ident">BacktraceContext</span>; <span class="kw">use</span> <span class="ident">sys_common</span>::<span class="ident">backtrace</span>::<span class="ident">Frame</span>; <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">resolve_symname</span><span class="op"><</span><span class="ident">F</span><span class="op">></span>(<span class="ident">frame</span>: <span class="ident">Frame</span>, <span class="ident">callback</span>: <span class="ident">F</span>, _: <span class="kw-2">&</span><span class="ident">BacktraceContext</span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> <span class="kw">where</span> <span class="ident">F</span>: <span class="ident">FnOnce</span>(<span class="prelude-ty">Option</span><span class="op"><</span><span class="kw-2">&</span><span class="ident">str</span><span class="op">></span>) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { <span class="kw">unsafe</span> { <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">info</span>: <span class="ident">Dl_info</span> <span class="op">=</span> <span class="ident">intrinsics</span>::<span class="ident">init</span>(); <span class="kw">let</span> <span class="ident">symname</span> <span class="op">=</span> <span class="kw">if</span> <span class="ident">dladdr</span>(<span class="ident">frame</span>.<span class="ident">exact_position</span> <span class="kw">as</span> <span class="kw-2">*</span><span class="kw-2">mut</span> _, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">info</span>) <span class="op">==</span> <span class="number">0</span> <span class="op">||</span> <span class="ident">info</span>.<span class="ident">dli_sname</span>.<span class="ident">is_null</span>() { <span class="prelude-val">None</span> } <span class="kw">else</span> { <span class="ident">CStr</span>::<span class="ident">from_ptr</span>(<span class="ident">info</span>.<span class="ident">dli_sname</span>).<span class="ident">to_str</span>().<span class="ident">ok</span>() }; <span class="ident">callback</span>(<span class="ident">symname</span>) } } <span class="attribute">#[<span class="ident">repr</span>(<span class="ident">C</span>)]</span> <span class="kw">struct</span> <span class="ident">Dl_info</span> { <span class="ident">dli_fname</span>: <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">libc</span>::<span class="ident">c_char</span>, <span class="ident">dli_fbase</span>: <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">libc</span>::<span class="ident">c_void</span>, <span class="ident">dli_sname</span>: <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">libc</span>::<span class="ident">c_char</span>, <span class="ident">dli_saddr</span>: <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">libc</span>::<span class="ident">c_void</span>, } <span class="kw">extern</span> { <span class="kw">fn</span> <span class="ident">dladdr</span>(<span class="ident">addr</span>: <span class="kw-2">*</span><span class="kw">const</span> <span class="ident">libc</span>::<span class="ident">c_void</span>, <span class="ident">info</span>: <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">Dl_info</span>) <span class="op">-></span> <span class="ident">libc</span>::<span class="ident">c_int</span>; 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