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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - JSCell::classInfo() shouldn't have a bunch of mitigations for being called during destruction"
href="https://bugs.webkit.org/show_bug.cgi?id=167066">167066</a>
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<th>Summary</th>
<td>JSCell::classInfo() shouldn't have a bunch of mitigations for being called during destruction
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<th>Classification</th>
<td>Unclassified
</td>
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<th>Product</th>
<td>WebKit
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<th>Version</th>
<td>WebKit Nightly Build
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<th>Hardware</th>
<td>All
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>Normal
</td>
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<th>Priority</th>
<td>P2
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<th>Component</th>
<td>JavaScriptCore
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
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<th>Reporter</th>
<td>fpizlo@apple.com
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<pre>Every time you use JSCell::classInfo(), you pay a compile time, code size, and running time cost for mitigations that are there to make that method safe to call from a destructor.
The only reason why we call that method in destructors is:
- Invalid use of jsCast<>. We used to have the discipline to only use static_cast<> in destructors.
- Some isolated uses of the classInfo in specific subclasses. Those can do the mitigations themselves.
We should also assert in classInfo() that we aren't destructing.</pre>
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