<html>
<head>
<base href="https://llvm.org/bugs/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - SEGV when starting thread with empty body"
href="https://llvm.org/bugs/show_bug.cgi?id=31923">31923</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>SEGV when starting thread with empty body
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>3.9
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>C++11
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>llvm@baszerr.eu
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=17962" name="attach_17962" title="example reproducing issue">attachment 17962</a> <a href="attachment.cgi?id=17962&action=edit" title="example reproducing issue">[details]</a></span>
example reproducing issue
starting thread, with empty function/lambda body causes SEGV, when compiled
with optimizations and profiling. adding any delay when starting thread (like
sleep for a nanosecond) fixes the issue.
example code is attached. compile it with:
clang++-3.9 -std=c++11 -O1 -pg -lpthread thread.cpp
i'm observing this behavior on clang++ starting with 3.5 up to 3.9,
inclusively.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>