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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 --- - [-cxx-abi microsoft] Bad layout for hierarchy involving empty bases and non-empty base with virtual method"
href="http://llvm.org/bugs/show_bug.cgi?id=18215">18215</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[-cxx-abi microsoft] Bad layout for hierarchy involving empty bases and non-empty base with virtual method
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</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>LLVM Codegen
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>david.majnemer@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>#if defined(__clang__) || defined(__GNUC__)
typedef __SIZE_TYPE__ size_t;
#endif
extern "C" int printf(const char *fmt, ...);
static char buffer[419430400];
inline void *operator new(size_t, void *pv) { return pv; }
struct ClassName0 {
bool ClassName0FieldName0;
ClassName0() {
printf(
"ClassName0FieldName0 : %llu\n",
(unsigned long long)((size_t) & ClassName0FieldName0 -
(size_t)buffer));
}
};
struct ClassName1 : public ClassName0 {
virtual void ClassName1Method() {}
};
struct ClassName2 : public ClassName1, public ClassName0 {
virtual void ClassName2Method() {}
};
struct ClassName3 : public ClassName0, public ClassName1, public ClassName2 {};
static void test_layout(const char *class_name, size_t size_of_class,
size_t align_of_class) {}
template <typename Class>
static void init_mem() {
new (buffer) Class;
}
#define test(Class) \
init_mem<Class>(), test_layout(#Class, sizeof(Class), __alignof(Class))
int main() { test(ClassName3); }
clang:
ClassName0FieldName0 : 8
ClassName0FieldName0 : 4
ClassName0FieldName0 : 16
ClassName0FieldName0 : 20
msvc:
ClassName0FieldName0 : 20
ClassName0FieldName0 : 4
ClassName0FieldName0 : 12
ClassName0FieldName0 : 16
This was run on clang r197060.</pre>
</div>
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