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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - ASAN Instrumentation removed when using optimizations"
href="https://bugs.llvm.org/show_bug.cgi?id=52382">52382</a>
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<th>Summary</th>
<td>ASAN Instrumentation removed when using optimizations
</td>
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<th>Product</th>
<td>new-bugs
</td>
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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
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>new bugs
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>mvanotti@google.com
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<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org
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<p>
<div>
<pre>The following code does not emit clang instrumentation when compiling with
optimizations:
```c
#include <cstdlib>
int global_array[100] = {-1};
int main(int argc, char **argv) {
return global_array[std::atoi("3") + 100]; // global buffer overflow
}
```
Code generated with `-fsanitize=address -O -g`
```
main: # @main
mov eax, dword ptr [rip + global_array+412]
ret
```
Shouldn't the code have asan instrumentation? When compiling with `-O0` the
instrumentation is there, as well as compiling with `-flegacy-pass-manager`</pre>
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