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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Size of a struct or a union is not limited"
href="https://llvm.org/bugs/show_bug.cgi?id=28009">28009</a>
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<th>Summary</th>
<td>Size of a struct or a union is not limited
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<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>-New Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>ch3root@openwall.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>While size of an array is limited this is not the case for structs and unions.
For example, on x86-32, structs larger than SIZE_MAX bytes are accepted. Or, on
x86-64, clang aborts on the following definitions:
struct { char a[-1ul / 8]; char b; } s;
union { char a[-1ul / 8]; int b; } u;
clang-3.9: .../llvm/tools/clang/lib/CodeGen/CGRecordLayoutBuilder.cpp:557: void
{anonymous}::CGRecordLowering::clipTailPadding(): Assertion `Prior->Kind ==
MemberInfo::Field && !Prior->FD && "Only storage fields have tail padding!"'
failed.
clang version: clang version 3.9.0 (trunk 271312)</pre>
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</p>
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