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This is an automatically generated e-mail. To reply, visit:
<a href="https://reviewboard.asterisk.org/r/4554/">https://reviewboard.asterisk.org/r/4554/</a>
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<p style="margin-top: 0;">On April 3rd, 2015, 4:36 p.m. CDT, <b>rmudgett</b> wrote:</p>
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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;">This is still a nuisance warning that doesn't add much value for the effort.</pre>
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<p>On April 3rd, 2015, 5:02 p.m. CDT, <b>Diederik de Groot</b> wrote:</p>
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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;">We can drop it no problem. I still think it could be useful in detecting _ref/_unref issues, alas it would quite a bit of work but could be beneficial. If there is consensus on the asterisk-developer side, i will make the required Makefile change to suppress this waning. I would like to make sure that you agree to drop the -Wunused-value warning, before i do so. So please report back.</pre>
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<p>On April 3rd, 2015, 5:04 p.m. CDT, <b>Diederik de Groot</b> wrote:</p>
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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;">By the way did you check out this 'Posted 5 days, 21 hours ago (March 29, 2015, 1:49 a.m.)' entry on this page. I tried to explain how this warning could be benifial in finding these used after ..._unref issues.</pre>
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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;">Those findings were not real bugs. See my review of those specific findings.</pre>
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<p>- rmudgett</p>
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<p>On April 3rd, 2015, 4:24 p.m. CDT, Diederik de Groot wrote:</p>
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<div>Review request for Asterisk Developers.</div>
<div>By Diederik de Groot.</div>
<p style="color: grey;"><i>Updated April 3, 2015, 4:24 p.m.</i></p>
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<b style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Bugs: </b>
<a href="https://issues.asterisk.org/jira/browse/ASTERISK-24917">ASTERISK-24917</a>
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<b style="color: #575012; font-size: 10pt;">Repository: </b>
Asterisk
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<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;">clang's static analyzer will throw quite a number warnings / errors during compilation, some of which can be very helpfull in finding corner-case bugs.
clang compiler warning:-Wunused-value
Changes:
apps/app_agent_pool.c
multiple occasions where return value from ast_channel_ref and ast_channel_unref is not checked not used.
return value from AST_LIST_REMOVE should be checked.
Possible issues with leaked logged reference (added remark)
channels/chan_iax2.c
return values from ast_callid_ref and ast_callid_unref can/should be used to update the pointer
return value from AST_SCHED_DEL should be used to update the scheduled variable
return value from AST_LIST_REMOVE should be checked.
channels/iax2/parser.c
return value from AST_LIST_REMOVE should be checked.
include/asterisk/stringfields.h
Quick fix to send the returned value from ast_string_field_ptr_set into the void.
Work in Progress:
There are too many sources issues with "-Wunused-value" for one person to create all the fixes. If we want to actually use this warning we will need a couple of extra hands-on.
Should we suppress "-Wunused-value" ? :
I think some of the issues pointed out by clang could be very helpfull, for example the "unref/ref/AST_LIST_REMOVE" changes that where needed in chan_iax2.c and apps/app_agent_pool.c. Some others a less interesting, for example the SCHED_DEL fixes.</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;">Just to make it clear, this was just a sample / proposal to work through large set of -Wunused-value warnings return. Some of them could be interesting, others might not be be.
Mostly looking for a discussion about which path to follow, and see if we can divvy up the work a little.
Compiles / Untested / Pretty certain it contains issue because of different way of dealing with return value from ..._unref.</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>/branches/13/include/asterisk/stringfields.h <span style="color: grey">(433444)</span></li>
<li>/branches/13/channels/iax2/parser.c <span style="color: grey">(433444)</span></li>
<li>/branches/13/channels/chan_iax2.c <span style="color: grey">(433444)</span></li>
<li>/branches/13/apps/app_agent_pool.c <span style="color: grey">(433444)</span></li>
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<p><a href="https://reviewboard.asterisk.org/r/4554/diff/" style="margin-left: 3em;">View Diff</a></p>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">File Attachments </h1>
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<li><a href="https://reviewboard.asterisk.org/media/uploaded/files/2015/03/28/83f2f382-9ef2-41cf-8e7a-c188c014c17e__make.report">ASTCFLAGS="-Wno-error=unused-value" make &| grep "[-W" -B1 -A2</a></li>
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