<html>
<head>
<base href="https://bugs.llvm.org/">
</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 - Sanitizers don't work with ThinLTO and new pass manager at opt level > 0"
href="https://bugs.llvm.org/show_bug.cgi?id=46418">46418</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Sanitizers don't work with ThinLTO and new pass manager at opt level > 0
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</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>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>new bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>tomasz.miasko@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org, yuanfang.chen@sony.com
</td>
</tr>
<tr>
<th>CC</th>
<td>yuanfang.chen@sony.com
</td>
</tr></table>
<p>
<div>
<pre>When using ThinLTO and -fexperimental-new-pass-manager at optimization
level > 0, sanitizer passes are registered using
registerOptimizerLastEPCallback
but the pre-link pipeline constructed with buildThinLTOPreLinkDefaultPipeline
doesn't include optimization pipeline and those callbacks are never invoked.
Thus the sanitizer instrumentation is not performed at all.
Example:
$ cat a.cpp
#include <string.h>
int main(int argc, char **argv) {
char x[10];
memset(x, 0, 10);
int res = x[argc * 10];
return res;
}
$ clang -fexperimental-new-pass-manager -flto=thin -fsanitize=address -O1 a.cpp
$ ./a.out
$ # No error report.</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>