Bus error on QWebkit

[geoffroylaca]

Hi everybody,

I'm currently working on an sh4 architecture with Qt Embedded 4.6.2.
All Qt's examples and demos works well except the webkit based binaries.
The browser demo crash with a bus error.

I found with gdb that it's libQtWebkit that crashed, without more explanations.
It's the same thing every time I'm using a QWebkit object. I can instantiate it but it crash when I want to set a property or calling a method.

If someone have any idea of how to fix this problem it would be very cool to share it.

Thx

[spirou]

Got the same issue last week, trying to launch WebKit examples on sh4 board with Qt Embedded 4.6.2
I wonder if you managed to get it running since August?

[chenzx]

hi, QT-4.7.3 webkit porting to SH-4（7785）, still the "Bus error".

---

Added after 51 minutes:

Hi, SH-4 can do un-aligned integer access,
But cant deal with un-aligned float/double,

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=545925

so, there may be a problem in WebKit WebCore/rendering/RenderArena.cpp（https://bugs.webkit.org/show_bug.cgi?id=19946）

QtWebKit（Qt-4.7.3）seems not fixed？Trying fix this, But not approved now.

[chenzx]

i can't find the WebKit SVN version for Qt-4.7.3, can some one help me?
figured out a method to validate the alignment problem under Win32 desktop for SH4-embedded：

TimerBase::TimerBase()
: m_nextFireTime(0)
, m_repeatInterval(0)
, m_heapIndex(-1)
#ifndef NDEBUG
, m_thread(currentThread())
#endif
{
+ ASSERT( (unsigned int)&m_nextFireTime % 8 == 0 );//perhaps need to check other places?
}