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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - scan-build does not recognize custom malloc/free based on dlmalloc"
href="http://llvm.org/bugs/show_bug.cgi?id=22237">22237</a>
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<th>Summary</th>
<td>scan-build does not recognize custom malloc/free based on dlmalloc
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>3.4
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Static Analyzer
</td>
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<th>Assignee</th>
<td>kremenek@apple.com
</td>
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<th>Reporter</th>
<td>simon.brandner@gmail.com
</td>
</tr>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>We use our own set of allocation routines.
They are called dr_malloc and dr_free, and are wrappers of a statically linked
version of dlmalloc (<a href="http://g.oswego.edu/dl/html/malloc.html">http://g.oswego.edu/dl/html/malloc.html</a>).
I intentionally did remove a valid dr_free to see if the problem is detected by
scan-build, but nothing was reported.
This is somehow related to #14819, but I do not find any hints how to annotate
a malloc/free to tell clang which routines do replace normal malloc.
There is also a mailinglist thread requesting such a feature:
<a href="http://lists.cs.uiuc.edu/pipermail/cfe-users/2013-July/000166.html">http://lists.cs.uiuc.edu/pipermail/cfe-users/2013-July/000166.html</a>
It seems it did not end up in a feature request here.
So if it does not exist, a feature to indicate to clang/scan-build which
functions replace malloc/calloc/free so it can run its static analysis on them
would be a great enhancement.</pre>
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