mentat/backtrace/fn.trace.html
2018-08-22 17:04:13 +00:00

154 lines
No EOL
6.6 KiB
HTML
Raw Permalink Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

<!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="API documentation for the Rust `trace` fn in crate `backtrace`.">
<meta name="keywords" content="rust, rustlang, rust-lang, trace">
<title>backtrace::trace - Rust</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>
</head>
<body class="rustdoc fn">
<!--[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">&#9776;</div>
<p class='location'><a href='index.html'>backtrace</a></p><script>window.sidebarCurrent = {name: 'trace', ty: 'fn', relpath: ''};</script><script defer src="sidebar-items.js"></script>
</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">
<h1 class='fqn'><span class='in-band'>Function <a href='index.html'>backtrace</a>::<wbr><a class="fn" href=''>trace</a></span><span class='out-of-band'><span id='render-detail'>
<a id="toggle-all-docs" href="javascript:void(0)" title="collapse all docs">
[<span class='inner'>&#x2212;</span>]
</a>
</span><a class='srclink' href='../src/backtrace/backtrace/mod.rs.html#41-43' title='goto source code'>[src]</a></span></h1>
<pre class='rust fn'>pub fn trace&lt;F:&nbsp;<a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(&amp;<a class="struct" href="../backtrace/struct.Frame.html" title="struct backtrace::Frame">Frame</a>) -&gt; <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>&gt;(cb: F)</pre><div class='docblock'><p>Inspects the current call-stack, passing all active frames into the closure
provided to calculate a stack trace.</p>
<p>This function is the workhorse of this library in calculating the stack
traces for a program. The given closure <code>cb</code> is yielded instances of a
<code>Frame</code> which represent information about that call frame on the stack. The
closure is yielded frames in a top-down fashion (most recently called
functions first).</p>
<p>The closure's return value is an indication of whether the backtrace should
continue. A return value of <code>false</code> will terminate the backtrace and return
immediately.</p>
<p>Once a <code>Frame</code> is acquired you will likely want to call <code>backtrace::resolve</code>
to convert the <code>ip</code> (instruction pointer) or symbol address to a <code>Symbol</code>
through which the name and/or filename/line number can be learned.</p>
<p>Note that this is a relatively low-level function and if you'd like to, for
example, capture a backtrace to be inspected later, then the <code>Backtrace</code>
type may be more appropriate.</p>
<h1 id="example" class="section-header"><a href="#example">Example</a></h1>
<pre class="rust rust-example-rendered">
<span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">backtrace</span>;
<span class="kw">fn</span> <span class="ident">main</span>() {
<span class="ident">backtrace</span>::<span class="ident">trace</span>(<span class="op">|</span><span class="ident">frame</span><span class="op">|</span> {
<span class="comment">// ...</span>
<span class="bool-val">true</span> <span class="comment">// continue the backtrace</span>
});
}</pre>
</div></section>
<section id='search' class="content hidden"></section>
<section class="footer"></section>
<aside id="help" class="hidden">
<div>
<h1 class="hidden">Help</h1>
<div class="shortcuts">
<h2>Keyboard Shortcuts</h2>
<dl>
<dt><kbd>?</kbd></dt>
<dd>Show this help dialog</dd>
<dt><kbd>S</kbd></dt>
<dd>Focus the search field</dd>
<dt><kbd></kbd></dt>
<dd>Move up in search results</dd>
<dt><kbd></kbd></dt>
<dd>Move down in search results</dd>
<dt><kbd></kbd></dt>
<dd>Switch tab</dd>
<dt><kbd>&#9166;</kbd></dt>
<dd>Go to active search result</dd>
<dt><kbd>+</kbd></dt>
<dd>Expand all sections</dd>
<dt><kbd>-</kbd></dt>
<dd>Collapse all sections</dd>
</dl>
</div>
<div class="infos">
<h2>Search Tricks</h2>
<p>
Prefix searches with a type followed by a colon (e.g.
<code>fn:</code>) to restrict the search to a given type.
</p>
<p>
Accepted types are: <code>fn</code>, <code>mod</code>,
<code>struct</code>, <code>enum</code>,
<code>trait</code>, <code>type</code>, <code>macro</code>,
and <code>const</code>.
</p>
<p>
Search functions by type signature (e.g.
<code>vec -> usize</code> or <code>* -> vec</code>)
</p>
</div>
</div>
</aside>
<script>
window.rootPath = "../";
window.currentCrate = "backtrace";
</script>
<script src="../main.js"></script>
<script defer src="../search-index.js"></script>
</body>
</html>