<html>
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<base href="http://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - -fsanitize=address doesn't obey aligned(256)"
href="http://llvm.org/bugs/show_bug.cgi?id=16277">16277</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>-fsanitize=address doesn't obey aligned(256)
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</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>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>-New Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>jyasskin@google.com
</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>$ clang++ --version
clang version 3.4 (trunk 182481)
$ cat test.cc
#include "assert.h"
#include <stdint.h>
__attribute__((noinline)) void foo() {
char c = 0;
__attribute__((aligned(256))) unsigned char data[256];
assert(0 == (reinterpret_cast<uintptr_t>(data) & (256 - 1)));
}
__attribute__((noinline)) void bar() {
char c = 0;
foo();
}
int main() { bar(); }
$ clang++ test.cc -o test && ./test
$ clang++ test.cc -o test -fsanitize=address && ./test
test: test.cc:7: void foo(): Assertion `0 == (reinterpret_cast<uintptr_t>(data)
& (256 - 1))' failed.
Aborted (core dumped)
$</pre>
</div>
</p>
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