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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Using `__builtin_frame_address(-1)` causes infinite loop."
href="https://llvm.org/bugs/show_bug.cgi?id=25497">25497</a>
</td>
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<th>Summary</th>
<td>Using `__builtin_frame_address(-1)` causes infinite loop.
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>3.7
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Macintosh
</td>
</tr>
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<th>OS</th>
<td>MacOS X
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>-New Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>richardross@fb.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>Created <span class=""><a href="attachment.cgi?id=15268" name="attach_15268" title="clang-backtrace">attachment 15268</a> <a href="attachment.cgi?id=15268&action=edit" title="clang-backtrace">[details]</a></span>
clang-backtrace
This simple snippet of code:
int main() {
void *x = __builtin_frame_address(-1);
}
Will cause the compiler to run infinitely, or at least until the systems'
memory limit is reached.
Obviously, __builtin_frame_address(-1) is an invalid operation and undefined
behavior, but there should probably be a better reporting mechanism than to
cause the compiler to hang.
Attached is a stack trace as provided by OSX's activity monitor sampler. Also
tested with latest trunk 3.7, unfortunately the precompiled version has no
symbol information.</pre>
</div>
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