<html>
<head>
<base href="https://bugs.webkit.org/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Give the heap object iterators the ability to return early."
href="https://bugs.webkit.org/show_bug.cgi?id=144011">144011</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Give the heap object iterators the ability to return early.
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>Product</th>
<td>WebKit
</td>
</tr>
<tr>
<th>Version</th>
<td>528+ (Nightly build)
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Unspecified
</td>
</tr>
<tr>
<th>OS</th>
<td>Unspecified
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>Normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P2
</td>
</tr>
<tr>
<th>Component</th>
<td>JavaScriptCore
</td>
</tr>
<tr>
<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>mark.lam@apple.com
</td>
</tr></table>
<p>
<div>
<pre>JSDollarVMPrototype::isValidCell() uses a heap object iterator to validate candidate cell pointers, and, when in use, is called a lot more often than the normal way those iterators are used. As a result, I see my instrumented VM killed with a SIGXCPU (CPU time limit exceeded). This patch gives the callback functor the ability to tell the iterators to return early when the functor no longer needs to continue iterating. With this, my instrumented VM is useful again for debugging.
Since heap iteration is not something that we do in a typical fast path, I don’t expect this to have any noticeable impact on performance.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the assignee for the bug.</li>
</ul>
</body>
</html>