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This is an automatically generated e-mail. To reply, visit:
<a href="https://reviewboard.asterisk.org/r/1714/">https://reviewboard.asterisk.org/r/1714/</a>
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<p style="margin-top: 0;">On February 9th, 2012, 3:42 p.m., <b>Mark Michelson</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/1714/diff/1/?file=23886#file23886line30514" style="color: black; font-weight: bold; text-decoration: underline;">/branches/1.8/channels/chan_sip.c</a>
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(Diff revision 1)
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static int load_module(void)</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="cm">/*</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> * Wait awhile for the TCP/TLS thread container to become empty.</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> *</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> * </span><span class="cs">XXX</span><span class="cm"> This is a hack, but the worker threads cannot be created</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> * joinable. They can die on their own and remove themselves</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> * from the container thus resulting in a huge memory leak.</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> */</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">wait_count</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">while</span> <span class="p">(</span><span class="n">ao2_container_count</span><span class="p">(</span><span class="n">threadt</span><span class="p">)</span> <span class="o">&&</span> <span class="o">++</span><span class="n">wait_count</span> <span class="o"><</span> <span class="mi">1000</span><span class="p">)</span> <span class="p">{</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">sched_yield</span><span class="p">();</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="p">}</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span class="p">(</span><span class="mi">1000</span> <span class="o"><=</span> <span class="n">wait_count</span><span class="p">)</span> <span class="p">{</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">ast_debug</span><span class="p">(</span><span class="mi">2</span><span class="p">,</span> <span class="s">"TCP/TLS thread container did not become empty :(</span><span class="se">\n</span><span class="s">"</span><span class="p">);</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="p">}</span></pre></td>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Let me know if I'm right or wrong here. Is this code block here to make sure the module doesn't get unloaded while the threads in the threadt container are still running?</pre>
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<pre style="margin-left: 1em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Yes. That is the idea.
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<p>- rmudgett</p>
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<p>On February 3rd, 2012, 5:05 p.m., rmudgett wrote:</p>
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<div>Review request for Asterisk Developers.</div>
<div>By rmudgett.</div>
<p style="color: grey;"><i>Updated Feb. 3, 2012, 5:05 p.m.</i></p>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
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<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">There is a thread resource leak in SIP-over-TCP or TLS. If a TCP connection fails
(eg. connection refused), then the thread is torn down, but as the thread is created
'joinable' in chan_sip.c:sip_prepare_socket(), and nothing ever pthread_join()'s to it,
we leak about 240Kb and 2x mmap maps.
The issue description copied above was not quite true. There was a joiner, but if the thread
died on its own, it removed the ability to join it. Also the thread may or may not have been
created joinable.
* _sip_tcp_helper_thread() only needs one parameter since the pvt parameter is only passed in as NULL and never used.</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </h1>
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<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">I don't have a setup to test the patch. However, by not creating the thread as
joinable fixed the issue for the reporter in his original patch.
Otherwise it compiles. :)
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<div style="margin-top: 1.5em;">
<b style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Bugs: </b>
<a href="https://issues.asterisk.org/jira/browse/ASTERISK-19203">ASTERISK-19203</a>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>/branches/1.8/channels/chan_sip.c <span style="color: grey">(354045)</span></li>
<li>/branches/1.8/channels/sip/include/sip.h <span style="color: grey">(354045)</span></li>
<li>/branches/1.8/include/asterisk/tcptls.h <span style="color: grey">(354045)</span></li>
</ul>
<p><a href="https://reviewboard.asterisk.org/r/1714/diff/" style="margin-left: 3em;">View Diff</a></p>
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