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<body><span class="vcard"><a class="email" href="mailto:steve.langasek@canonical.com" title="Steve Langasek <steve.langasek@canonical.com>"> <span class="fn">Steve Langasek</span></a>
</span> changed
<a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - [llvmpipe] SIGFPE pthread_barrier_destroy.c:40"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94088">bug 94088</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<tr>
<td style="text-align:right;">Resolution</td>
<td>FIXED
</td>
<td>---
</td>
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<td style="text-align:right;">Status</td>
<td>RESOLVED
</td>
<td>REOPENED
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<b><a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - [llvmpipe] SIGFPE pthread_barrier_destroy.c:40"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94088#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - [llvmpipe] SIGFPE pthread_barrier_destroy.c:40"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94088">bug 94088</a>
from <span class="vcard"><a class="email" href="mailto:steve.langasek@canonical.com" title="Steve Langasek <steve.langasek@canonical.com>"> <span class="fn">Steve Langasek</span></a>
</span></b>
<pre>Hello,
The patch for this bug is incomplete. In between the calls to
pipe_barrier_init() and pipe_barrier_destroy() are calls to
pipe_barrier_wait(), which is implemented on top of pthread_barrier_wait().
Since pipe_barrier_init() has not been called, the calls to
pthread_barrier_wait() have undefined behavior, as per
<<a href="http://pubs.opengroup.org/onlinepubs/009695399/functions/pthread_barrier_wait.html">http://pubs.opengroup.org/onlinepubs/009695399/functions/pthread_barrier_wait.html</a>>,
<<a href="http://linux.die.net/man/3/pthread_barrier_wait">http://linux.die.net/man/3/pthread_barrier_wait</a>>.
The applied commit is sufficient to fix the immediate SIGFPE problem with
glibc, but the API is still being used incorrectly and could result in future
crashes on other implementations.</pre>
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