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<base href="http://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Static analyzer does not track pointer values across memcpy"
href="http://llvm.org/bugs/show_bug.cgi?id=16731">16731</a>
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<th>Summary</th>
<td>Static analyzer does not track pointer values across memcpy
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Static Analyzer
</td>
</tr>
<tr>
<th>Assignee</th>
<td>kremenek@apple.com
</td>
</tr>
<tr>
<th>Reporter</th>
<td>labath@google.com
</td>
</tr>
<tr>
<th>CC</th>
<td>klimek@google.com, llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>$ cat leak.c
#include <stdlib.h>
char *f() {
void *x = malloc(47);
char *a;
memcpy(&a, &x, sizeof a);
return a;
}
$ clang --analyze leak.c
leak.c:7:3: warning: Potential leak of memory pointed to by 'x'
return a;
^~~~~~~~
1 warning generated.
This warning should not be reported, as the allocated memory is still
accessible using the return value of the function.</pre>
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