<html>
<head>
<base href="http://llvm.org/bugs/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - ASAN on ARM fails on fast unwind"
href="http://llvm.org/bugs/show_bug.cgi?id=22741">22741</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>ASAN on ARM fails on fast unwind
</td>
</tr>
<tr>
<th>Product</th>
<td>compiler-rt
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>compiler-rt
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>renato.golin@linaro.org
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=13964" name="attach_13964" title="stack traces: stage1, stage2, no-fast-unwind">attachment 13964</a> <a href="attachment.cgi?id=13964&action=edit" title="stack traces: stage1, stage2, no-fast-unwind">[details]</a></span>
stack traces: stage1, stage2, no-fast-unwind
When walking the stack, ASAN fails to get the proper frames on ARM. On stage1
(GCC compiled ASAN), the stack unwinds with the right size (three), but the
addresses are bogus. On stage2 (Clang's), the stack doesn't even have the right
size and all you can see is the current frame.
When using ASAN_OPTIONS=fast_unwind_on_malloc=0, the stack is correctly
unwounded (correct.out attached).</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>