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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - PIC references to __dso_handle should behave as with hidden visibility"
href="https://llvm.org/bugs/show_bug.cgi?id=31932">31932</a>
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<th>Summary</th>
<td>PIC references to __dso_handle should behave as with hidden visibility
</td>
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>All
</td>
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<th>OS</th>
<td>All
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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
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<th>Component</th>
<td>LLVM Codegen
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>roland@hack.frob.com
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org, phosek@chromium.org
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<th>Classification</th>
<td>Unclassified
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<p>
<div>
<pre>When Clang emits calls to __cxa_atexit, it generates references to the symbol
__dso_handle. The sole purpose of this symbol is that it have a different
address in each linked module (shared library or the executable). To that end,
its definition is always made with hidden visibility. So using the GOT
indirection table in PIC mode just adds extra indirection overhead and an extra
dynamic reloc that will always be relaxed into a simple R_*_RELATIVE.
GCC emits references to __dso_handle that do not use the GOT.
I have a patch to fix this, though it might need some cleanup.</pre>
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