RESOLVED INVALID 51123
[Qt][WK2][Symbian] Crash in QLocalSocket/QLocalServer based implementation of IPC 
https://bugs.webkit.org/show_bug.cgi?id=51123
Summary [Qt][WK2][Symbian] Crash in QLocalSocket/QLocalServer based implementation of...
Siddharth Mathur
Reported 2010-12-15 11:43:01 PST
Qt MiniBrowser and QtWebProcess fail to communicate due to a null pointer deref (R0 is zero). I will gather the call stack later after returning from my vacation. Based purely on trace messages, the cause might be: (a) the socket used by the (unix domain) socket server/client was closed by the "hack" code in qeventdispatcher_symbian.cpp (see the debug message "[Qt Message] exception on 8 [will close the socket handle - hack]") (b) one of the Platsec messages preventing QtWebProcess working with the File Server had something to do with the issue. Unfortunately traceCore truncated the messages, grr! 00:06:59.627 *PlatSec* ERROR - Capability check failed - A Message (function number=0x00000016) from Thread QtWebProcess[a000e543]0004::QtWebProcess, sent to Server !FileServer, was checked by Thread efile.exe[100039e3]0001::Main and was found to be missing 00:06:59.629 *PlatSec* ERROR - Capability check failed - A Message (function number=0x00000016) from Thread QtWebProcess[a000e543]0004::QtWebProcess, sent to Server !FileServer, was checked by Thread efile.exe[100039e3]0001::Main and was found to be missing 00:07:00.087 Exc 1 Cpsr=60000010 FAR=00000000 FSR=00000805 00:07:00.087 R0=00000000 R1=00515944 R2=00000002 R3=00000000 00:07:00.087 R4=005159a0 R5=00000000 R6=00000000 R7=00632230 00:07:00.087 R8=7c76ad50 R9=00633474 R10=00515a54 R11=00000000 00:07:00.087 R12=0062ed98 R13=00515938 R14=7d3279d3 R15=7c76ad30 00:07:00.087 R13Svc=92682000 R14Svc=80060ab0 SpsrSvc=60000010 00:07:00.087 Thread QtWebProcess::QtWebProcess, KernCSLocked=0 00:07:00.087 Thread full name=QtWebProcess::QtWebProcess 00:07:00.087 Thread ID=706, KernCSLocked=0 00:07:00.087 Thread QtWebProcess::QtWebProcess Panic KERN-EXEC 3 00:07:00.088 Thread QtWebProcess::Local-c87a1b20 Panic KERN-EXEC 3 00:07:00.088 Thread QtWebProcess::0c601e0008200e5d Panic KERN-EXEC 3 00:07:00.088 Thread QtWebProcess::0c6028c85569abf9 Panic KERN-EXEC 3 00:07:00.088 Thread QtWebProcess::0c602e18b8170acb Panic KERN-EXEC 3 00:07:00.249 [Qt Message] exception on 8 [will close the socket handle - hack]
Attachments
Add attachment proposed patch, testcase, etc.
Siddharth Mathur
Comment 1 2010-12-15 11:46:51 PST
For Symbian, we may have to do the CoreIPC using native Symbian RSocket API, or move Qt's implementation of QLocalServer and QLocalSocket to use TCP sockets rather than Unix-domain sockets as is currently the case. OpenC != mission critical stuff. (It seems we need reliable as well as asynch message passing here, with a variable size payload, so Symbian message queues don't look like an option)
Markus Goetz
Comment 2 2011-01-05 02:35:33 PST
Related to http://bugreports.qt.nokia.com/browse/QTBUG-16441
Siddharth Mathur
Comment 3 2011-03-03 12:30:45 PST
The Symbian port of WebKit2 is being reworked, so this bug report doesn't need to clog the system at this time. I will reopen later if necessary.
Note You need to log in before you can comment on or make changes to this bug.