[webkit-dev] Crash on start up in Series 60 emulator

[Peter Thomas]

Hi Guys, I ran into a similar problem when using the maintenance SDK.  A 
quick fix to get it running is to comment out the method that obtains 
the user agent string and use the hard-coded value provided.

i.e - in WebKitControl.cpp

// 
-----------------------------------------------------------------------------
// CWebKitControl::UserAgentString
//
// 
-----------------------------------------------------------------------------
//
TPtrC CWebKitControl::UserAgentStringL()
    {
    if( !iUserAgent )
        {
        /*
        // Get User Agent String
        CUserAgent* usrAgnt = CUserAgent::NewL();
        CleanupStack::PushL( usrAgnt );
        //
        HBufC8* buf = usrAgnt->UserAgentL();
        CleanupStack::PushL( buf );
        //
        if( buf )
            {
            // convert the userAgent to 16 bit
            iUserAgent = HBufC::NewL( buf->Length() );
            iUserAgent->Des().Copy( buf->Des() );
            }
        else
            {
            // come up with a hardcoded UA string
            iUserAgent = KHttpUserAgentString().AllocL();
            }
        CleanupStack::PopAndDestroy( 2 ); // usrAgnt, buf
        */
        iUserAgent = KHttpUserAgentString().AllocL();
        }
    return iUserAgent->Des();
    }


bradley.morrison at nokia.com wrote:
> Hi Brad,
>
> This sounds similar to:
>
> http://bugzilla.opendarwin.org/show_bug.cgi?id=10318
>
> But this is the first I've heard of it as at the current S60 trunk,
> all clean builds and stable here. We did see something similar
> last week, but that was fixed in r15827 (see bug history above).
>
> Please let us know your current SDK version - the latest maintenance
> release is not yet supported; I patched the build script and wiki 
> recently for that.
>
> If it still crashes after another 'svn up' to the very latest 
> and full build on SDK 3.0, is it possible to send us a stack trace?
>
> Thanks,
> Bradley
>
>
>
>
>
> ________________________________
>
> From: webkit-dev-bounces at opendarwin.org
> [mailto:webkit-dev-bounces at opendarwin.org] On Behalf Of ext Brad Lassey
> Sent: Wednesday, August 16, 2006 4:51 PM
> To: webkit-dev at opendarwin.org
> Subject: [webkit-dev] Crash on start up in Series 60 emulator
>
>
>
>
> I had a working build of Webkit for Series 60, then I updated my tree.
> Now I get a KERM-EXEC 3 panic on start up.  According to the stack trace
> it happens on line 141 of BrowserSettingsContainer.cpp, in the SettingL
> method.  I've included that source below
>
> MBrCtlSettingInterface& CBrowserSettingsContainer::SettingL(
> TBrCtlDefs::TBrCtlSettings aId )
>     {
>     TInt settingNum = 0;
>     TBool found = EFalse;
>     while(( settingNum < iSettings.Count() ) && !found )
>         {
>         if( aId == (iSettings[settingNum])->SettingId() )  //crash
> happens when evaluating here
>             {
>             found = ETrue;
>             }
>         else
>             {
>             settingNum++;
>             }
>         }
>     // if not found above, then create a new one
>     if( !found )
>         {
>         iSettings.Append( CBrowserSetting::NewL(aId, this) );
>         MarkAsUpdatedL( aId );
>         }
>     return *iSettings[settingNum];
>     }
>
>
> At the time of the crash, settingNum is 0.  I put a breakpoint just
> above.  This method is executed just fine several times, being called
> from InsertDefaultSettingsL.  The crash happens when it is called during
> the construction of a CUserAgent in CWebKitControl::UserAgentStringL.
> The peculur thing is that the iCount of the RArray iSettings is
> 597717828 just before the crash occurs, which seems abnormally high.
> Also, it seems that accessing that array at all will cause the crash.
>
> I have now rebuilt from a fresh pull on a fresh computer with the same
> results.  Has anyone else seen this behavior?  Is there a fix?
>
> Thanks,
>     Brad
>
>
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