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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - ShadowCallStack crashing with exception handling"
href="https://bugs.llvm.org/show_bug.cgi?id=44095">44095</a>
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<th>Summary</th>
<td>ShadowCallStack crashing with exception handling
</td>
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<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
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<th>Version</th>
<td>trunk
</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>enhancement
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Backend: AArch64
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>leonardchan@google.com
</td>
</tr>
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<th>CC</th>
<td>arnaud.degrandmaison@arm.com, llvm-bugs@lists.llvm.org, peter.smith@linaro.org, Ties.Stuij@arm.com
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<p>
<div>
<pre>Shadow call stack seems to be conflicting with exception handling:
```
#include <iostream>
int main () {
try {
throw 20;
} catch (int e) {
std::cout << "An exception occurred. Exception Nr. " << e << '\n';
}
return 0;
}
```
In this case, compiling with
```
$ prebuilt/third_party/clang/linux-x64/bin/clang++ -std=c++17 ~/misc/test.cpp
-fno-sanitize=safe-stack -target aarch64-unknown-linux-gnu -ffixed-x18
--sysroot=prebuilt/third_party/sysroot/linux/ -g
```
then running prints 20 normally, but appending `-fsanitize=shadow-call-stack`
to the end causes a segfault.</pre>
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