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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - WebAssembly: WasmMemory::lastAllocatedMemoryMode is racy"
href="https://bugs.webkit.org/show_bug.cgi?id=169892">169892</a>
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<th>Summary</th>
<td>WebAssembly: WasmMemory::lastAllocatedMemoryMode is racy
</td>
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<th>Classification</th>
<td>Unclassified
</td>
</tr>
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<th>Product</th>
<td>WebKit
</td>
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<th>Version</th>
<td>WebKit Nightly Build
</td>
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<th>Hardware</th>
<td>Unspecified
</td>
</tr>
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<th>OS</th>
<td>Unspecified
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>Normal
</td>
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<th>Priority</th>
<td>P2
</td>
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<th>Component</th>
<td>JavaScriptCore
</td>
</tr>
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
</td>
</tr>
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<th>Reporter</th>
<td>jfbastien@apple.com
</td>
</tr>
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<th>CC</th>
<td>fpizlo@apple.com, jfbastien@apple.com, keith_miller@apple.com, mark.lam@apple.com, msaboff@apple.com, sbarati@apple.com
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<th>Blocks</th>
<td>159775
</td>
</tr></table>
<p>
<div>
<pre>It's a benign race... but you can create two Workers, use wasm, and they clobber the value independently.
I'm not sure TLS is the best thing either. Having the VM may be better?</pre>
</div>
</p>
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