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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [MS ABI] Clang doesn't generate local vftables with dllimport"
href="https://llvm.org/bugs/show_bug.cgi?id=23549">23549</a>
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<th>Summary</th>
<td>[MS ABI] Clang doesn't generate local vftables with dllimport
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>unspecified
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
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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>C++
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>david.majnemer@gmail.com
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<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
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<p>
<div>
<pre>consider:
struct _declspec(dllimport) A {
A()
virtual ~A();
};
A *f() { return new A();}
MSVC generates:
This calls 'operator new' and the imported A constructor. However, it also
overwrites the VFPtr with a so-called "local vftable". I suspect this is to
support overriding the global operator new and delete.
More information is available here:
<a href="https://groups.google.com/d/msg/microsoft.public.vc.language/atSh_2VSc2w/EgJ3r_7OzVUJ">https://groups.google.com/d/msg/microsoft.public.vc.language/atSh_2VSc2w/EgJ3r_7OzVUJ</a></pre>
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