[webkit-dev] Random Failures

[Eric Seidel]

Tracking this as:
http://bugzilla.opendarwin.org/show_bug.cgi?id=3896

-eric

On Jul 7, 2005, at 11:29 AM, Eric Seidel wrote:

> libgmalloc didn't seem to produce anything.
>
> This seems to be a timing issue.
>
> I was able to catch it failing in the debugger.
>
> Program received signal EXC_BAD_ACCESS, Could not access memory.
> Reason: KERN_PROTECTION_FAILURE at address: 0x00003ff3
> 0x01040c2c in QString::setLength ()
> (gdb) bt
> #0  0x01040c2c in QString::setLength ()
> #1  0x010414cc in QString::insert ()
> #2  0x010d75c8 in khtml::Decoder::decode ()
> #3  0x0105c7b8 in KHTMLPart::write ()
> #4  0x0022eda8 in -[WebDataSource(WebPrivate) _receivedData:]  
> (self=0x4da3d20, _cmd=0x2ee0, data=0x4da5590) at /Volumes/Stuff/ 
> Projects/WKOpen/WebKit/WebView.subproj/WebDataSource.m:818
> #5  0x0024d564 in -[WebMainResourceLoader addData:]  
> (self=0x4da8450, _cmd=0x2ee0, data=0x4da5590) at /Volumes/Stuff/ 
> Projects/WKOpen/WebKit/WebView.subproj/WebMainResourceLoader.m:155
> #6  0x0022b8e0 in -[WebLoader didReceiveData:lengthReceived:]  
> (self=0x4da8450, _cmd=0x2ee0, data=0x4da5590, lengthReceived=16371)  
> at /Volumes/Stuff/Projects/WKOpen/WebKit/WebView.subproj/ 
> WebLoader.m:528
> #7  0x0024df14 in -[WebMainResourceLoader  
> didReceiveData:lengthReceived:] (self=0x4da8450, _cmd=0x2ee0,  
> data=0x4da5590, lengthReceived=0) at /Volumes/Stuff/Projects/WKOpen/ 
> WebKit/WebView.subproj/WebMainResourceLoader.m:366
> #8  0x0022bdd8 in -[WebLoader  
> connection:didReceiveData:lengthReceived:] (self=0x0, _cmd=0x2ee0,  
> con=0x0, data=0x0, lengthReceived=0) at /Volumes/Stuff/Projects/ 
> WKOpen/WebKit/WebView.subproj/WebLoader.m:631
> #9  0x928af7d8 in -[NSURLConnection(NSURLConnectionInternal)  
> _sendDidReceiveDataCallback] ()
> #10 0x928adc4c in -[NSURLConnection(NSURLConnectionInternal)  
> _sendCallbacks] ()
> #11 0x928ada18 in _sendCallbacks ()
> #12 0x9074bd2c in __CFRunLoopDoSources0 ()
> #13 0x9074b25c in __CFRunLoopRun ()
> #14 0x9074acdc in CFRunLoopRunSpecific ()
> #15 0x9288c164 in -[NSRunLoop runMode:beforeDate:] ()
> #16 0x00002f74 in dumpRenderTree (filename=0x90a19534  
> "runMode:beforeDate:") at /Volumes/Stuff/Projects/WKOpen2/ 
> WebKitTools/DumpRenderTree/DumpRenderTree.m:247
> #17 0x00003274 in main (argc=2, argv=0xbffff504) at /Volumes/Stuff/ 
> Projects/WKOpen2/WebKitTools/DumpRenderTree/DumpRenderTree.m:95
>
>
>
> On Jul 7, 2005, at 8:45 AM, Eric Seidel wrote:
>
>
>> Thanks Mark.
>>
>> One next step is to try running under libgmalloc.  That should  
>> catch whatever this is every time on the same test.
>>
>> I'll try that when I get into work.
>>
>> -eric
>>
>> On Jul 7, 2005, at 5:59 AM, Mark Rowe wrote:
>>
>>
>>
>>>
>>> On 8/07/2005, at 00:41 , Mark Rowe wrote:
>>>
>>>
>>>
>>>
>>>> I've spent the last two hours trying to track down which change  
>>>> causes the test failures + DumpRenderTree crash.  As was  
>>>> mentioned, rolling out the patch for bugs #3882 and #3829 does  
>>>> not resolve the issue.  Rolling out #3826 and #3674 individually  
>>>> didn't help either.  It seemed that removing *both* stopped the  
>>>> crashing but that may have just been luck as the crashes are  
>>>> intermittent at best.  I'm retesting this scenario now.
>>>>
>>>>
>>>>
>>>
>>> It seems I was just lucky...  As far as I can tell none of the  
>>> four patches have any relation to the failing test + crash.  I'm  
>>> not sure which other changes have been checked in recently that I  
>>> could check, so I'll leave that up to someone else.
>>>
>>> Regards,
>>>
>>> Mark Rowe
>>> <http://bdash.net.nz/>
>>>
>>>
>>>
>>
>> _______________________________________________
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>> webkit-dev at opendarwin.org
>> http://www.opendarwin.org/mailman/listinfo/webkit-dev
>>
>>
>
>