<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 - msan: incorrect variable names for vla"
href="https://bugs.llvm.org/show_bug.cgi?id=37207">37207</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>msan: incorrect variable names for vla
</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>enhancement
</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>dvyukov@google.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>#include <stdio.h>
int main()
{
volatile int x = 10;
volatile char y[x];
if (y[5])
printf("here\n");
return 0;
}
$ clang -v
clang version 7.0.0 (trunk 326052)
$ clang test.c -fsanitize=memory -fsanitize-memory-track-origins -g
$ ./a.out
==260809==WARNING: MemorySanitizer: use-of-uninitialized-value
#0 0x499e02 in main test.c:7:6
Uninitialized value was created by an allocation of 'vla' in the stack frame
of function 'main'
#0 0x499b10 in main test.c:4
SUMMARY: MemorySanitizer: use-of-uninitialized-value /tmp/test1.c:7:6 in main
The variable is called 'y', not 'vla'.</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>