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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - clang inserts stack protector in function with inline assembly "m" constraint"
href="https://bugs.llvm.org/show_bug.cgi?id=37583">37583</a>
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<th>Summary</th>
<td>clang inserts stack protector in function with inline assembly "m" constraint
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<th>Product</th>
<td>clang
</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
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<th>Status</th>
<td>NEW
</td>
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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>libclang
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>ndesaulniers@google.com
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<th>CC</th>
<td>klimek@google.com, llvm-bugs@lists.llvm.org
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<pre><a href="https://godbolt.org/g/TmLd9z">https://godbolt.org/g/TmLd9z</a>
The two examples show that clang will insert a stack guard in a function with
inline assembly and the "m" constraint compiled with -fstack-protector-strong.
Is there a good reason to do so, or this a bug in clang?
I know the function attribute no_stack_protector was recently added to clang.
That seems to help.
It just seems weird the just "=r" generates no stack protector, but "=rm" does.
>From discussion:
<a href="https://lkml.org/lkml/2018/5/24/1389">https://lkml.org/lkml/2018/5/24/1389</a></pre>
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