fn.resolve.html 6.6 KB

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  45. <h1 class='fqn'><span class='in-band'>Function <a href='index.html'>backtrace</a>::<wbr><a class="fn" href=''>resolve</a></span><span class='out-of-band'><span id='render-detail'>
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  50. <pre class='rust fn'>pub fn resolve&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.Symbol.html" title="struct backtrace::Symbol">Symbol</a>)&gt;(addr: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.pointer.html">*mut </a><a class="enum" href="https://doc.rust-lang.org/nightly/std/os/raw/enum.c_void.html" title="enum std::os::raw::c_void">c_void</a>, cb: F)</pre><div class='docblock'><p>Resolve an address to a symbol, passing the symbol to the specified
  51. closure.</p>
  52. <p>This function will look up the given address in areas such as the local
  53. symbol table, dynamic symbol table, or DWARF debug info (depending on the
  54. activated implementation) to find symbols to yield.</p>
  55. <p>The closure may not be called if resolution could not be performed, and it
  56. also may be called more than once in the case of inlined functions.</p>
  57. <p>Symbols yielded represent the execution at the specified <code>addr</code>, returning
  58. file/line pairs for that address (if available).</p>
  59. <h1 id="example" class="section-header"><a href="#example">Example</a></h1>
  60. <pre class="rust rust-example-rendered">
  61. <span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">backtrace</span>;
  62. <span class="kw">fn</span> <span class="ident">main</span>() {
  63. <span class="ident">backtrace</span>::<span class="ident">trace</span>(<span class="op">|</span><span class="ident">frame</span><span class="op">|</span> {
  64. <span class="kw">let</span> <span class="ident">ip</span> <span class="op">=</span> <span class="ident">frame</span>.<span class="ident">ip</span>();
  65. <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> {
  66. <span class="comment">// ...</span>
  67. });
  68. <span class="bool-val">false</span> <span class="comment">// only look at the top frame</span>
  69. });
  70. }</pre>
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