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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [tsan] false positive report for dup and mmap/sem_open"
href="https://bugs.llvm.org/show_bug.cgi?id=51038">51038</a>
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<th>Summary</th>
<td>[tsan] false positive report for dup and mmap/sem_open
</td>
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<th>Product</th>
<td>compiler-rt
</td>
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<th>Version</th>
<td>12.0
</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>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>tsan
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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</tr>
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<th>Reporter</th>
<td>krizan@eset.sk
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=25013" name="attach_25013" title="sample test program">attachment 25013</a> <a href="attachment.cgi?id=25013&action=edit" title="sample test program">[details]</a></span>
sample test program
Thread sanitizer falsely reports a "data race on file descriptor X" between
parallel dup and mmap (called from sem_open), although those were separate
descriptors accessed properly.
See sample test program for details.
Note, that this report cannot be neither suppressed with a blacklist on dup,
mmap nor sem_open functions.</pre>
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