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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 --- - [ASan] Implement use-after-scope check."
href="https://llvm.org/bugs/show_bug.cgi?id=27453">27453</a>
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<th>Summary</th>
<td>[ASan] Implement use-after-scope check.
</td>
</tr>
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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>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>new bugs
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
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<th>Reporter</th>
<td>vitalybuka@google.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Some local variables can have lifetime smaller then function execution.
E.g.:
int main() {
int *p = nullptr;
{
int x = 0;
p = &x;
}
return *p;
}
Usually such cases does not crash, as stack frame still has region allocated
for such variables. Still content of such variables after lifetime end is
undefined.
Asan is can detect such cases by poisoning/poisoning memory according lifetime
markers.</pre>
</div>
</p>
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