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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - WebAssembly: can mprotect ever fail?"
href="https://bugs.webkit.org/show_bug.cgi?id=169890">169890</a>
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<th>Summary</th>
<td>WebAssembly: can mprotect ever fail?
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
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<th>Product</th>
<td>WebKit
</td>
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<th>Version</th>
<td>WebKit Nightly Build
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<th>Hardware</th>
<td>Unspecified
</td>
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<th>OS</th>
<td>Unspecified
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<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>
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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>
<tr>
<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>
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<p>
<div>
<pre>WasmMemory uses mprotect and tries to handle its failure. I'm not sure it should ever fail according to the manpage for MacOS. Linux seems to allow failure if the kernel runs out of memory for its internal data structures, which seems *really* bad.
In both cases I suspect we should just assert out.</pre>
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