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This is an automatically generated e-mail. To reply, visit:
<a href="https://git.reviewboard.kde.org/r/118614/">https://git.reviewboard.kde.org/r/118614/</a>
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<p style="margin-top: 0;">On June 8th, 2014, 1:20 p.m. UTC, <b>Thiago Macieira</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;">QDBusConnection is supposed to be threadsafe.</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;">It's definitely not... https://bugreports.qt-project.org/browse/QTBUG-39528</pre>
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<p>- David</p>
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<p>On June 8th, 2014, 10:11 a.m. UTC, David Faure wrote:</p>
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<div>Review request for KDE Frameworks, Aleix Pol Gonzalez and Thiago Macieira.</div>
<div>By David Faure.</div>
<p style="color: grey;"><i>Updated June 8, 2014, 10:11 a.m.</i></p>
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<b style="color: #575012; font-size: 10pt;">Repository: </b>
kio
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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;">Unittest for kiocore's thread-safety
KIO thread safety: use one DBus connection per thread
KIO thread safety: don't use static buffers.
They obviously lead to data races between threads.
KIO: create one instance of Scheduler per thread.</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;">helgrind'ing the unittest.
I found and fixed many races within Qt by doing that...
Race on QMutex::id --> https://codereview.qt-project.org/86237
Race in QThreadStorage --> https://codereview.qt-project.org/87047
Race in QLoggingCategory --> https://codereview.qt-project.org/87054
Also reported QTBUG-39528 (QDBusConnection::sessionBus race) (but we have KDBusConnectionPool for that)
And there are still more races in Qt:
QMutex::isRecursive, qdbus_loadLibDBus, QDBusConnectionPrivate::connectSignal, qt_message_print....
And a few in our code:
the getenv(KDE_FORK_SLAVES) in KIO, and the dbus interface for klauncher in KDEInitInterface::ensureKdeinitRunning.</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>src/core/scheduler.cpp <span style="color: grey">(e762e369b8d74971831dc1e9f4d083bfd77b8e30)</span></li>
<li>src/core/connectionbackend.cpp <span style="color: grey">(532141af5ab7676d1287379e56ff48bd7fa10c37)</span></li>
<li>autotests/threadtest.cpp <span style="color: grey">(PRE-CREATION)</span></li>
<li>autotests/CMakeLists.txt <span style="color: grey">(81d261b8620e0a0512a5bc021ed189e910c0922a)</span></li>
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<p><a href="https://git.reviewboard.kde.org/r/118614/diff/" style="margin-left: 3em;">View Diff</a></p>
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