<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 - Fatal error when compiling with dataflow sanitizer (DFSan) - "fatal error: error in backend: Broken function found, compilation aborted!""
href="https://bugs.llvm.org/show_bug.cgi?id=33870">33870</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Fatal error when compiling with dataflow sanitizer (DFSan) - "fatal error: error in backend: Broken function found, compilation aborted!"
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</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>Common Code Generator Code
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>rtrieu@google.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>$ cat blacklist.txt
fun:snprintf=uninstrumented
fun:snprintf=custom
$ cat reduce.cpp
extern "C" void snprintf(...);
void Foo() {
char a[1];
snprintf(0, a);
}
$ clang -cc1 -emit-obj -O1 -fsanitize=dataflow
-fsanitize-blacklist=dfsan_abilist.txt -x c++ reduce.cpp
Wrong types for attribute: byval inalloca nest noalias nocapture nonnull
readnone readonly sret dereferenceable(1) dereferenceable_or_null(1)
call void (i16*, ...) @__dfsw_snprintf(i16* %3, i32 nonnull 0, i8* %0) #5
fatal error: error in backend: Broken function found, compilation aborted!</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>