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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - False positives when using std::condition_variable::wait_for"
href="https://bugs.llvm.org/show_bug.cgi?id=46656">46656</a>
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<th>Summary</th>
<td>False positives when using std::condition_variable::wait_for
</td>
</tr>
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<th>Product</th>
<td>compiler-rt
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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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>enhancement
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>tsan
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>jchorko+clang@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=23709" name="attach_23709" title="Example program that demonstrates issue">attachment 23709</a> <a href="attachment.cgi?id=23709&action=edit" title="Example program that demonstrates issue">[details]</a></span>
Example program that demonstrates issue
Thread sanitizer reports false positive double locks and data races when
std::condition_variable::wait_for is used.
std::condition_variable::wait_for is implemented using pthread_cond_clockwait
when available (GLIBC >= 2.30 or Android API >= 30, see
<a href="https://reviews.llvm.org/D65339">https://reviews.llvm.org/D65339</a>) instead of pthread_cond_timedwait, but there
is no interceptor for this function in
compiler-rt/lib/tsan/rtl/tsan_interceptors_posix.cpp
Issue can be reproduced with attached program test_case.cpp, compiled with
-fsanitize=thread -stdlib=libc++ flags on current trunk (tested on
fb75451775f83c04d53e4e94bb4bd298ea9a882f)</pre>
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