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This is an automatically generated e-mail. To reply, visit:
<a href="http://svn.reviewboard.kde.org/r/6022/">http://svn.reviewboard.kde.org/r/6022/</a>
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<p style="margin-top: 0;">On December 1st, 2010, 5:23 p.m., <b>Kevin Ottens</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;">Well, if the job is explicitely isAutoDelete() then I'd say it's a bug in the caller to try to delete it in the first place...</pre>
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<p>On December 1st, 2010, 8:24 p.m., <b>Aurélien Gâteau</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;">I see your point, but on the other hand if the job is not *autodelete* and the slot connected to result() deletes the job, then the code will crash because the call to isAutoDelete() will access freed memory.</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;">This code shows to problems:
1) code after emit is dangerous
2) nobody should delete the sender in a slot, or if it does at least is should use deleteLater
Because of 1) and that this is in a library I agree with the extra guard, but the caller should also be fixed.</pre>
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<p>- Andras</p>
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<p>On December 1st, 2010, 5:01 p.m., Aurélien Gâteau wrote:</p>
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<div>Review request for kdelibs and Kevin Ottens.</div>
<div>By Aurélien Gâteau.</div>
<p style="color: grey;"><i>Updated 2010-12-01 17:01:44</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;">If a someone calls "delete job" on a slot connected to the KJob::result() signal, KJob crashes because the job does not exist anymore when execution comes back to KJob::emitResult(). I added a guard to prevent that. An alternative would be to call deleteLater() before emitting the signals but I was afraid it would cause trouble if slots connected to the emitted signals used event loops.</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;">Wrote a unit-test to demonstrate the problem. This also helps with bug #241562 although I have another request prepared to hopefully definitely nail it down.</pre>
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<b style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Bugs: </b>
<a href="https://bugs.kde.org/show_bug.cgi?id=241562">241562</a>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>trunk/KDE/kdelibs/kdecore/jobs/kjob.cpp <span style="color: grey">(1202165)</span></li>
<li>trunk/KDE/kdelibs/kdecore/tests/kjobtest.h <span style="color: grey">(1202165)</span></li>
<li>trunk/KDE/kdelibs/kdecore/tests/kjobtest.cpp <span style="color: grey">(1202165)</span></li>
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<p><a href="http://svn.reviewboard.kde.org/r/6022/diff/" style="margin-left: 3em;">View Diff</a></p>
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