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List: kde-panel-devel
Subject: Re: Review Request 124877: fix corruption of startupconfig(files) in Qt5.6
From: "Takahiro Hashimoto" <kenya888 () gmail ! com>
Date: 2015-08-31 17:24:20
Message-ID: 20150831172420.10622.24083 () mimi ! kde ! org
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> On 9月 1, 2015, 2 a.m., Aleix Pol Gonzalez wrote:
> > To be honest, I don't see how this should make a difference...
I'm sorry for lacking of my explanation...
Please see the difference of QString::fromLocal8Bit(const QByteArray &str) \
implementation between Qt 5.5 and 5.6
(5.5) http://code.qt.io/cgit/qt/qtbase.git/tree/src/corelib/tools/qstring.h?h=5.5#n541
(5.6) http://code.qt.io/cgit/qt/qtbase.git/tree/src/corelib/tools/qstring.h#n545
QString::fromLocal8Bit(const QByteArray &str) no longer use qstrlen() so \
that the padding data in QByteArray is included in the return value. It's \
the root cause of this problem.
If we want to use QString::fromLocal8Bit() with QByteArray excluding \
padding data with Qt 5.6, we can use inline function \
QString::fromLocal8Bit(const char *str, int size = -1)
http://code.qt.io/cgit/qt/qtbase.git/tree/src/corelib/tools/qstring.h#n536
I don't know the clear reason for the text buffer in kdostartupconfig being \
initialized with 1024bytes. But I think my patch is the smallest change to \
avoid the side effects.
- Takahiro
-----------------------------------------------------------
This is an automatically generated e-mail. To reply, visit:
https://git.reviewboard.kde.org/r/124877/#review84659
-----------------------------------------------------------
On 9月 1, 2015, 1:33 a.m., Takahiro Hashimoto wrote:
>
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://git.reviewboard.kde.org/r/124877/
> -----------------------------------------------------------
>
> (Updated 9月 1, 2015, 1:33 a.m.)
>
>
> Review request for Plasma.
>
>
> Bugs: 351609
> https://bugs.kde.org/show_bug.cgi?id=351609
>
>
> Repository: plasma-workspace
>
>
> Description
> -------
>
> Building Plasma5 with Qt 5.6 branch, kstartupconfig5/kdostartupconfig5 \
> generates corrupted files.
> $HOME/.config/startupconfigfiles
> $HOME/.config/startupconfig
>
>
> Diffs
> -----
>
> startkde/kstartupconfig/kdostartupconfig.cpp 3944c06
>
> Diff: https://git.reviewboard.kde.org/r/124877/diff/
>
>
> Testing
> -------
>
> works for me.
>
> 1. execute kstartupconfig5
> 2. check if both files are not corrupted.
>
>
> Thanks,
>
> Takahiro Hashimoto
>
>
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<td>
This is an automatically generated e-mail. To reply, visit:
<a href="https://git.reviewboard.kde.org/r/124877/">https://git.reviewboard.kde.org/r/124877/</a>
</td>
</tr>
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<br />
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; \
padding-left: 10px;"> <p style="margin-top: 0;">On 9月 1st, 2015, 2 a.m. \
JST, <b>Aleix Pol Gonzalez</b> wrote:</p> <blockquote style="margin-left: \
1em; border-left: 2px solid #d0d0d0; padding-left: 10px;"> <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;">To be honest, I don't see how this should \
make a difference...</p></pre> </blockquote>
</blockquote>
<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;">I'm sorry for lacking of my \
explanation...</p> <p style="padding: 0;text-rendering: inherit;margin: \
0;line-height: inherit;white-space: inherit;">Please see the difference of \
QString::fromLocal8Bit(const QByteArray &str) implementation between Qt \
5.5 and 5.6</p> <p style="padding: 0;text-rendering: inherit;margin: \
0;line-height: inherit;white-space: inherit;">(5.5) \
http://code.qt.io/cgit/qt/qtbase.git/tree/src/corelib/tools/qstring.h?h=5.5#n541
(5.6) http://code.qt.io/cgit/qt/qtbase.git/tree/src/corelib/tools/qstring.h#n545</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: \
inherit;white-space: inherit;">QString::fromLocal8Bit(const QByteArray \
&str) no longer use qstrlen() so that the padding data in QByteArray is \
included in the return value. It's the root cause of this problem.</p> <p \
style="padding: 0;text-rendering: inherit;margin: 0;line-height: \
inherit;white-space: inherit;">If we want to use QString::fromLocal8Bit() \
with QByteArray excluding padding data with Qt 5.6, we can use inline \
function QString::fromLocal8Bit(const char *str, int size = -1)</p> <p \
style="padding: 0;text-rendering: inherit;margin: 0;line-height: \
inherit;white-space: \
inherit;">http://code.qt.io/cgit/qt/qtbase.git/tree/src/corelib/tools/qstring.h#n536</p>
<p style="padding: 0;text-rendering: inherit;margin: 0;line-height: \
inherit;white-space: inherit;">I don't know the clear reason for the text \
buffer in kdostartupconfig being initialized with 1024bytes. But I think my \
patch is the smallest change to avoid the side effects.</p></pre> <br />
<p>- Takahiro</p>
<br />
<p>On 9月 1st, 2015, 1:33 a.m. JST, Takahiro Hashimoto wrote:</p>
<table bgcolor="#fefadf" width="100%" cellspacing="0" cellpadding="12" \
style="border: 1px #888a85 solid; border-radius: 6px; -moz-border-radius: \
6px; -webkit-border-radius: 6px;"> <tr>
<td>
<div>Review request for Plasma.</div>
<div>By Takahiro Hashimoto.</div>
<p style="color: grey;"><i>Updated 9月 1, 2015, 1:33 a.m.</i></p>
<div style="margin-top: 1.5em;">
<b style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Bugs: </b>
<a href="https://bugs.kde.org/show_bug.cgi?id=351609">351609</a>
</div>
<div style="margin-top: 1.5em;">
<b style="color: #575012; font-size: 10pt;">Repository: </b>
plasma-workspace
</div>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description \
</h1> <table width="100%" bgcolor="#ffffff" cellspacing="0" \
cellpadding="10" style="border: 1px solid #b8b5a0"> <tr>
<td>
<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;">Building Plasma5 with Qt 5.6 branch, \
kstartupconfig5/kdostartupconfig5 generates corrupted files.
$HOME/.config/startupconfigfiles
$HOME/.config/startupconfig</pre>
</td>
</tr>
</table>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing \
</h1> <table width="100%" bgcolor="#ffffff" cellspacing="0" \
cellpadding="10" style="border: 1px solid #b8b5a0"> <tr>
<td>
<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;">works for me. </p> <ol \
style="padding: 0;text-rendering: inherit;margin: 0 0 0 2em;line-height: \
inherit;white-space: normal;"> <li style="padding: 0;text-rendering: \
inherit;margin: 0;line-height: inherit;white-space: normal;">execute \
kstartupconfig5</li> <li style="padding: 0;text-rendering: inherit;margin: \
0;line-height: inherit;white-space: normal;">check if both files are not \
corrupted.</li> </ol></pre>
</td>
</tr>
</table>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> \
</h1> <ul style="margin-left: 3em; padding-left: 0;">
<li>startkde/kstartupconfig/kdostartupconfig.cpp <span style="color: \
grey">(3944c06)</span></li>
</ul>
<p><a href="https://git.reviewboard.kde.org/r/124877/diff/" \
style="margin-left: 3em;">View Diff</a></p>
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