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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Static analyzer false positive of Unix API violation: Improper use of 'open', when 'open is in an alternative namespace"
href="https://llvm.org/bugs/show_bug.cgi?id=28331">28331</a>
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<th>Summary</th>
<td>Static analyzer false positive of Unix API violation: Improper use of 'open', when 'open is in an alternative namespace
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</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>
</tr>
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<th>Reporter</th>
<td>nega@icecube.umd.edu
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<th>Classification</th>
<td>Unclassified
</td>
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=16642" name="attach_16642" title="sample code demonstrating Unix API violation false positive">attachment 16642</a> <a href="attachment.cgi?id=16642&action=edit" title="sample code demonstrating Unix API violation false positive">[details]</a></span>
sample code demonstrating Unix API violation false positive
When the function open() appears in an alternative namespace with an unusual
number of arguments, the static analyzer still reports it as a violation of the
standard Unix function open().
This behavior occurs in checker-278:
clang version 3.8.0 (tags/checker/checker-278)
Target: x86_64-apple-darwin15.2.0
Apple Clang:
Apple LLVM version 7.0.2 (clang-700.1.81)
Target: x86_64-apple-darwin15.2.0
and Ubuntu 16.04 Clang:
clang version 3.8.0-2ubuntu3 (tags/RELEASE_380/final)
Target: x86_64-pc-linux-gnu
The attached code demonstrates this behavior with:
❯ clang++ --analyze main.cc
main.cc:17:3: warning: Call to 'open' with more than three arguments
outer::inner::open(ofs_, "foo");
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 warning generated.</pre>
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