249 lines
No EOL
12 KiB
HTML
249 lines
No EOL
12 KiB
HTML
<!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 `backtrace` crate.">
|
||
<meta name="keywords" content="rust, rustlang, rust-lang, backtrace">
|
||
|
||
<title>backtrace - 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 mod">
|
||
<!--[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>
|
||
|
||
<p class='location'>Crate backtrace</p><div class="sidebar-elems"><div class="block items"><ul><li><a href="#structs">Structs</a></li><li><a href="#functions">Functions</a></li></ul></div><p class='location'></p><script>window.sidebarCurrent = {name: 'backtrace', ty: 'mod', relpath: '../'};</script></div>
|
||
</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'>Crate <a class="mod" href=''>backtrace</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'>−</span>]
|
||
</a>
|
||
</span><a class='srclink' href='../src/backtrace/lib.rs.html#1-178' title='goto source code'>[src]</a></span></h1>
|
||
<div class='docblock'><p>A library for acquiring a backtrace at runtime</p>
|
||
<p>This library is meant to supplement the <code>RUST_BACKTRACE=1</code> support of the
|
||
standard library by allowing an acquisition of a backtrace at runtime
|
||
programmatically. The backtraces generated by this library do not need to be
|
||
parsed, for example, and expose the functionality of multiple backend
|
||
implementations.</p>
|
||
<h1 id="implementation" class="section-header"><a href="#implementation">Implementation</a></h1>
|
||
<p>This library makes use of a number of strategies for actually acquiring a
|
||
backtrace. For example unix uses libgcc's libunwind bindings by default to
|
||
acquire a backtrace, but coresymbolication or dladdr is used on OSX to
|
||
acquire symbol names while linux uses gcc's libbacktrace.</p>
|
||
<p>When using the default feature set of this library the "most reasonable" set
|
||
of defaults is chosen for the current platform, but the features activated
|
||
can also be controlled at a finer granularity.</p>
|
||
<h1 id="platform-support" class="section-header"><a href="#platform-support">Platform Support</a></h1>
|
||
<p>Currently this library is verified to work on Linux, OSX, and Windows, but
|
||
it may work on other platforms as well. Note that the quality of the
|
||
backtrace may vary across platforms.</p>
|
||
<h1 id="api-principles" class="section-header"><a href="#api-principles">API Principles</a></h1>
|
||
<p>This library attempts to be as flexible as possible to accommodate different
|
||
backend implementations of acquiring a backtrace. Consequently the currently
|
||
exported functions are closure-based as opposed to the likely expected
|
||
iterator-based versions. This is done due to limitations of the underlying
|
||
APIs used from the system.</p>
|
||
<h1 id="usage" class="section-header"><a href="#usage">Usage</a></h1>
|
||
<p>First, add this to your Cargo.toml</p>
|
||
<pre><code class="language-toml">[dependencies]
|
||
backtrace = "0.2"
|
||
</code></pre>
|
||
<p>Next:</p>
|
||
|
||
<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="kw">let</span> <span class="ident">ip</span> <span class="op">=</span> <span class="ident">frame</span>.<span class="ident">ip</span>();
|
||
<span class="kw">let</span> <span class="ident">symbol_address</span> <span class="op">=</span> <span class="ident">frame</span>.<span class="ident">symbol_address</span>();
|
||
|
||
<span class="comment">// Resolve this instruction pointer to a symbol name</span>
|
||
<span class="ident">backtrace</span>::<span class="ident">resolve</span>(<span class="ident">ip</span>, <span class="op">|</span><span class="ident">symbol</span><span class="op">|</span> {
|
||
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">name</span>) <span class="op">=</span> <span class="ident">symbol</span>.<span class="ident">name</span>() {
|
||
<span class="comment">// ...</span>
|
||
}
|
||
<span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">filename</span>) <span class="op">=</span> <span class="ident">symbol</span>.<span class="ident">filename</span>() {
|
||
<span class="comment">// ...</span>
|
||
}
|
||
});
|
||
|
||
<span class="bool-val">true</span> <span class="comment">// keep going to the next frame</span>
|
||
});
|
||
}</pre>
|
||
</div><h2 id='structs' class='section-header'><a href="#structs">Structs</a></h2>
|
||
<table>
|
||
<tr class=' module-item'>
|
||
<td><a class="struct" href="struct.Backtrace.html"
|
||
title='struct backtrace::Backtrace'>Backtrace</a></td>
|
||
<td class='docblock-short'>
|
||
<p>Representation of an owned and self-contained backtrace.</p>
|
||
|
||
</td>
|
||
</tr>
|
||
<tr class=' module-item'>
|
||
<td><a class="struct" href="struct.BacktraceFrame.html"
|
||
title='struct backtrace::BacktraceFrame'>BacktraceFrame</a></td>
|
||
<td class='docblock-short'>
|
||
<p>Captured version of a frame in a backtrace.</p>
|
||
|
||
</td>
|
||
</tr>
|
||
<tr class=' module-item'>
|
||
<td><a class="struct" href="struct.BacktraceSymbol.html"
|
||
title='struct backtrace::BacktraceSymbol'>BacktraceSymbol</a></td>
|
||
<td class='docblock-short'>
|
||
<p>Captured version of a symbol in a backtrace.</p>
|
||
|
||
</td>
|
||
</tr>
|
||
<tr class=' module-item'>
|
||
<td><a class="struct" href="struct.Frame.html"
|
||
title='struct backtrace::Frame'>Frame</a></td>
|
||
<td class='docblock-short'>
|
||
<p>A trait representing one frame of a backtrace, yielded to the <code>trace</code>
|
||
function of this crate.</p>
|
||
|
||
</td>
|
||
</tr>
|
||
<tr class=' module-item'>
|
||
<td><a class="struct" href="struct.Symbol.html"
|
||
title='struct backtrace::Symbol'>Symbol</a></td>
|
||
<td class='docblock-short'>
|
||
<p>A trait representing the resolution of a symbol in a file.</p>
|
||
|
||
</td>
|
||
</tr>
|
||
<tr class=' module-item'>
|
||
<td><a class="struct" href="struct.SymbolName.html"
|
||
title='struct backtrace::SymbolName'>SymbolName</a></td>
|
||
<td class='docblock-short'>
|
||
<p>A wrapper around a symbol name to provide ergonomic accessors to the
|
||
demangled name, the raw bytes, the raw string, etc.</p>
|
||
|
||
</td>
|
||
</tr></table><h2 id='functions' class='section-header'><a href="#functions">Functions</a></h2>
|
||
<table>
|
||
<tr class=' module-item'>
|
||
<td><a class="fn" href="fn.resolve.html"
|
||
title='fn backtrace::resolve'>resolve</a></td>
|
||
<td class='docblock-short'>
|
||
<p>Resolve an address to a symbol, passing the symbol to the specified
|
||
closure.</p>
|
||
|
||
</td>
|
||
</tr>
|
||
<tr class=' module-item'>
|
||
<td><a class="fn" href="fn.trace.html"
|
||
title='fn backtrace::trace'>trace</a></td>
|
||
<td class='docblock-short'>
|
||
<p>Inspects the current call-stack, passing all active frames into the closure
|
||
provided to calculate a stack trace.</p>
|
||
|
||
</td>
|
||
</tr></table></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>⏎</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> |