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This is an automatically generated e-mail. To reply, visit:
<a href="https://git.reviewboard.kde.org/r/125123/">https://git.reviewboard.kde.org/r/125123/</a>
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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;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">where does it crash? we get the warnings even on linux but it never crashes. are there parts of this patch you want us to include or not?</p></pre>
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<a href="https://git.reviewboard.kde.org/r/125123/diff/2/?file=402393#file402393line227" style="color: black; font-weight: bold; text-decoration: underline;">projectmanagers/cmake/cmakecommitchangesjob.cpp</a>
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">void CMakeCommitChangesJob::start()</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">qFatal</span><span class="p">(</span> <span class="s">"In the wrong thread, %s:%d"</span><span class="p">,</span> <span class="n">__FILE__</span><span class="p">,</span> <span class="n">__LINE__</span> <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;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">wth? just use the assert above. if you hit that in a release build then you'll hit it in a debug build - and that should <em style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: normal;">not</em> happen. thus assertion is fine no need to add this for release only</p></pre>
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<a href="https://git.reviewboard.kde.org/r/125123/diff/2/?file=402393#file402393line233" style="color: black; font-weight: bold; text-decoration: underline;">projectmanagers/cmake/cmakecommitchangesjob.cpp</a>
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">void CMakeCommitChangesJob::start()</pre></td>
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<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">m_manager</span><span class="o">-></span><span class="n">addWatcher</span><span class="p">(</span><span class="n">m_project</span><span class="p">,</span> <span class="n">m_path</span><span class="p">.</span><span class="n">toLocalFile</span><span class="p">());</span></pre></td>
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<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">m_manager</span><span class="o">-></span><span class="n">addWatcher</span><span class="p">(</span><span class="n">m_project</span><span class="p">,</span> <span class="n">m_path</span><span class="p">.</span><span class="n">toLocalFile</span><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;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">in Qt 5 you can simply use the return value of this function. Why do you keep working on Qt 4 based KDevplatform on Mac - I really don't get it... You are making your life unneccessarily complicated.</p></pre>
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<a href="https://git.reviewboard.kde.org/r/125123/diff/2/?file=402393#file402393line256" style="color: black; font-weight: bold; text-decoration: underline;">projectmanagers/cmake/cmakecommitchangesjob.cpp</a>
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">void CMakeCommitChangesJob::start()</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="o">!</span><span class="n">folder</span><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;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">again, assertion is enough</p></pre>
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<a href="https://git.reviewboard.kde.org/r/125123/diff/2/?file=402393#file402393line460" style="color: black; font-weight: bold; text-decoration: underline;">projectmanagers/cmake/cmakecommitchangesjob.cpp</a>
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">void CMakeCommitChangesJob::folderAvailable(ProjectFolderItem* item)</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="o">!</span><span class="n">m_parentItem</span> <span class="o">||</span> <span class="n">m_project</span><span class="o">-></span><span class="kr">thread</span><span class="p">()</span> <span class="o">!=</span> <span class="n">QThread</span><span class="o">::</span><span class="n">currentThread</span><span class="p">()){</span></pre></td>
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<a href="https://git.reviewboard.kde.org/r/125123/diff/2/?file=402394#file402394line176" style="color: black; font-weight: bold; text-decoration: underline;">projectmanagers/cmake/cmakemanager.h</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">static</span> <span class="kt">size_t</span> <span class="n">m_MaxAllowedWatchedPaths</span><span class="p">,</span> <span class="n">m_TotalWatchedPaths</span><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;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">static should be prefixed with <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">s_</code></p></pre>
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<p>- Milian Wolff</p>
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<p>On September 9th, 2015, 8:18 p.m. UTC, René J.V. Bertin wrote:</p>
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<div>Review request for KDE Software on Mac OS X and KDevelop.</div>
<div>By René J.V. Bertin.</div>
<p style="color: grey;"><i>Updated Sept. 9, 2015, 8:18 p.m.</i></p>
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<b style="color: #575012; font-size: 10pt;">Repository: </b>
kdevelop
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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;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">This is a confirmed bug in the 4.7 branch (and possibly in the KF5 version) where the cmake project importer can add (many) more paths to QFileSystemWatcher objects than the maximum supported number of open files (https://bugs.kde.org/show_bug.cgi?id=341551). On OS X at least this leads almost inevitably to a crash.</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">This patch prevents this by keeping track of the number of added paths, and by not adding more than a preconfigured maximum (determined empirically in this draft implementation).
The crash occurs in <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">folder = dynamic_cast<CMakeFolderItem*>(f);</code> in <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">CMakeCommitChangesJob::makeChanges()</code>; as an additional protection that function watches the <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">errno</code> variable for errors occurring during the <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">addPath()</code> operation; if an error is signalled, <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">folder</code> is not obtained by dynamic casting but by initialision a new <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">CMakeFolderItem</code>.
<code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">makeChanges()</code> also contains a few ASSERT statements that should remain effective even when building with <code style="text-rendering: inherit;color: #4444cc;padding: 0;white-space: normal;margin: 0;line-height: inherit;">QT_NO_DEBUG</code>; the patch takes care of that as well.</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">I'm presenting this mostly for reference, in hope it may be useful for Kdevelop/KF5 too. In a real implementation the maximum number of patch watchers would of course be configurable.</p></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;"><p style="padding: 0;text-rendering: inherit;margin: 0;line-height: inherit;white-space: inherit;">On OS X 10.9.5 with kdelibs 4.14.11 and Qt 4.8.7 .
m_MaxAllowedWatchedPaths is set to a value that is reasonably close to the limit where errors start occurring, and large enough to allow loading for instance kdepimlibs, kdepim and kdepim-runtime in a single session.</p></pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>projectmanagers/cmake/cmakecommitchangesjob.cpp <span style="color: grey">(7ce24fb)</span></li>
<li>projectmanagers/cmake/cmakemanager.h <span style="color: grey">(19fc0c1)</span></li>
<li>projectmanagers/cmake/cmakemanager.cpp <span style="color: grey">(2caecdb)</span></li>
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<p><a href="https://git.reviewboard.kde.org/r/125123/diff/" style="margin-left: 3em;">View Diff</a></p>
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