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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [UBSAN] Call to function (unknown) through pointer to incorrect function type"
href="https://bugs.llvm.org/show_bug.cgi?id=32692">32692</a>
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<th>Summary</th>
<td>[UBSAN] Call to function (unknown) through pointer to incorrect function type
</td>
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<th>Product</th>
<td>new-bugs
</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>Windows NT
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>new bugs
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>ernest.galix@gmail.com
</td>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=18297" name="attach_18297" title="Source code">attachment 18297</a> <a href="attachment.cgi?id=18297&action=edit" title="Source code">[details]</a></span>
Source code
I have a program that dynamically links against a library.
The program passes a function pointer to that library, to execute.
But the ubsan (Undefined Behavior Sanitizer) specified that the pointer is on
an incorrect function type. And that occurs only
- if the callback function has a class as parameter
- if the callback function has a class as parameter, but only forward declared
- if I specify the compilation flags: -fvisibility=hidden.
I use clang to compile my project.
The attached code is reduced to a simple test case. Check the comments to see
where we can act to remove some warnings. But these fixes seem obvious.</pre>
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