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<base href="http://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - MS ABI: dllexport'd VFTable name differs between CL and clang"
href="http://llvm.org/bugs/show_bug.cgi?id=21031">21031</a>
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<th>Summary</th>
<td>MS ABI: dllexport'd VFTable name differs between CL and clang
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Windows NT
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>LLVM Codegen
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>david.majnemer@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>consider:
struct __declspec(dllexport) A {};
struct __declspec(dllexport) B {
virtual void f(void);
};
struct __declspec(dllexport) C : virtual B {
virtual void g(void);
};
struct __declspec(dllexport) D : virtual B, C {};
our VFTable's differ like so:
--- different.cpp_clang.obj.dump 2014-09-22 14:12:46.712804100 -0700
+++ different.cpp_vs.obj.dump 2014-09-22 14:12:46.758808700 -0700
@@ -1,7 +1,7 @@
const B::`vftable'[0]: public: virtual void __thiscall B::f(void)
const C::`vftable'{for `C'}[0]: public: virtual void __thiscall C::g(void)
const C::`vftable'{for `B'}[0]: public: virtual void __thiscall B::f(void)
-const D::`vftable'{for `B'}[0]: public: virtual void __thiscall B::f(void)
+const D::`vftable'[0]: public: virtual void __thiscall B::f(void)
const D::`vftable'{for `C'}[0]: public: virtual void __thiscall C::g(void)
const C::`vbtable'[0]: -4
const C::`vbtable'[4]: 4</pre>
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