[mythtv-commits] Ticket #7011: segfault on startup of mythfrontend - win32 - backtrace attached.

MythTV mythtv at cvs.mythtv.org
Wed Sep 16 07:13:57 UTC 2009 

#7011: segfault on startup of mythfrontend - win32 - backtrace attached.
---------------------------------+------------------------------------------
 Reporter:  davidbuzz at gmail.com  |        Owner:  nigel   
     Type:  defect               |       Status:  assigned
 Priority:  major                |    Milestone:  0.22    
Component:  Ports - Windows      |      Version:  head    
 Severity:  medium               |   Resolution:          
  Mlocked:  0                    |  
---------------------------------+------------------------------------------
Changes (by nigel):

  * status:  new => assigned


Old description:

> using the standard mythfrontend.cmd file for debugging my
> mythfrontend.exe give me this backtrace on startup.  version is a newly
> downloaded 21709 ( ie current head).
>
> GNU gdb 6.8
> Copyright (C) 2008 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later
> <http://gnu.org/licenses/gpl.html>
> This is free software: you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law.  Type "show
> copying"
> and "show warranty" for details.
> This GDB was configured as "i686-pc-mingw32"...
> [New thread 1628.0x82c]
> 2009-09-08 10:54:52.596 mythfrontend version: trunk [21709]
> www.mythtv.org
> [New thread 1628.0x208]
> [New thread 1628.0x494]
> [New thread 1628.0x508]
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x09666434 in TriggeredConfigurationGroup::Save (this=0xf12dbb0) at
> mythconfiggr
> oups.cpp:521
> 521             configStack->Save();
>
> Thread 4 (thread 1628.0x508):
> #0  0x7c90e514 in ntdll!LdrAccessResource () from
> C:\WINDOWS\system32\ntdll.dll
> No symbol table info available.
> #1  0x7c90df4a in ntdll!ZwWaitForMultipleObjects () from
> C:\WINDOWS\system32\ntd
> ll.dll
> No symbol table info available.
> #2  0x7c809590 in KERNEL32!CreateFileMappingA () from
> C:\WINDOWS\system32\kernel
> 32.dll
> No symbol table info available.
> #3  0x7c80a115 in WaitForMultipleObjects () from
> C:\WINDOWS\system32\kernel32.dl
> l
> No symbol table info available.
> #4  0x6a114bf4 in qt_adopted_thread_watcher_function () at
> thread/qthread_win.cp
> p:203
>         handlesCopy = {{p = 0xf12ffb8, d = 0xf12ffb8}}
>         ret = 258
>         loops = 1
>         offset = 0
>         count = 2
>         handleIndex = 0
> #5  0x77c3a243 in msvcrt!_endthread () from
> C:\WINDOWS\system32\msvcrt.dll
> No symbol table info available.
> #6  0x00000000 in ?? ()
> No symbol table info available.
>
> Thread 3 (thread 1628.0x494):
> #0  0x7c90e514 in ntdll!LdrAccessResource () from
> C:\WINDOWS\system32\ntdll.dll
> No symbol table info available.
> #1  0x7c90df5a in ntdll!ZwWaitForSingleObject () from
> C:\WINDOWS\system32\ntdll.
> dll
> No symbol table info available.
> #2  0x7c8025db in WaitForSingleObjectEx () from
> C:\WINDOWS\system32\kernel32.dll
>
> No symbol table info available.
> #3  0x00000528 in ?? ()
> No symbol table info available.
> #4  0x00000000 in ?? ()
> No symbol table info available.
>
> Thread 1 (thread 1628.0x82c):
> #0  0x09666434 in TriggeredConfigurationGroup::Save (this=0xf12dbb0) at
> mythconf
> iggroups.cpp:521
>         this = (class TriggeredConfigurationGroup * const) 0xf12dbb0
> #1  0x0f135bdc in ?? ()
> No symbol table info available.
> #2  0x0f135be0 in ?? ()
> No symbol table info available.
> #3  0x0965f5c2 in ConfigurationGroup::Save (this=0x7c90e920) at
> mythconfiggroups
> .cpp:99
>         this = (class ConfigurationGroup * const) 0xf10e5e8
> #4  0x00000000 in ?? ()
> No symbol table info available.
> (gdb)

New description:

 using the standard mythfrontend.cmd file for debugging my mythfrontend.exe
 give me this backtrace on startup.  version is a newly downloaded 21709 (
 ie current head).
 {{{
 GNU gdb 6.8
 Copyright (C) 2008 Free Software Foundation, Inc.
 License GPLv3+: GNU GPL version 3 or later
 <http://gnu.org/licenses/gpl.html>
 This is free software: you are free to change and redistribute it.
 There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
 and "show warranty" for details.
 This GDB was configured as "i686-pc-mingw32"...
 [New thread 1628.0x82c]
 2009-09-08 10:54:52.596 mythfrontend version: trunk [21709] www.mythtv.org
 [New thread 1628.0x208]
 [New thread 1628.0x494]
 [New thread 1628.0x508]

 Program received signal SIGSEGV, Segmentation fault.
 0x09666434 in TriggeredConfigurationGroup::Save (this=0xf12dbb0) at
 mythconfiggr
 oups.cpp:521
 521             configStack->Save();

 Thread 4 (thread 1628.0x508):
 #0  0x7c90e514 in ntdll!LdrAccessResource () from
 C:\WINDOWS\system32\ntdll.dll
 No symbol table info available.
 #1  0x7c90df4a in ntdll!ZwWaitForMultipleObjects () from
 C:\WINDOWS\system32\ntd
 ll.dll
 No symbol table info available.
 #2  0x7c809590 in KERNEL32!CreateFileMappingA () from
 C:\WINDOWS\system32\kernel
 32.dll
 No symbol table info available.
 #3  0x7c80a115 in WaitForMultipleObjects () from
 C:\WINDOWS\system32\kernel32.dl
 l
 No symbol table info available.
 #4  0x6a114bf4 in qt_adopted_thread_watcher_function () at
 thread/qthread_win.cp
 p:203
         handlesCopy = {{p = 0xf12ffb8, d = 0xf12ffb8}}
         ret = 258
         loops = 1
         offset = 0
         count = 2
         handleIndex = 0
 #5  0x77c3a243 in msvcrt!_endthread () from C:\WINDOWS\system32\msvcrt.dll
 No symbol table info available.
 #6  0x00000000 in ?? ()
 No symbol table info available.

 Thread 3 (thread 1628.0x494):
 #0  0x7c90e514 in ntdll!LdrAccessResource () from
 C:\WINDOWS\system32\ntdll.dll
 No symbol table info available.
 #1  0x7c90df5a in ntdll!ZwWaitForSingleObject () from
 C:\WINDOWS\system32\ntdll.
 dll
 No symbol table info available.
 #2  0x7c8025db in WaitForSingleObjectEx () from
 C:\WINDOWS\system32\kernel32.dll

 No symbol table info available.
 #3  0x00000528 in ?? ()
 No symbol table info available.
 #4  0x00000000 in ?? ()
 No symbol table info available.

 Thread 1 (thread 1628.0x82c):
 #0  0x09666434 in TriggeredConfigurationGroup::Save (this=0xf12dbb0) at
 mythconf
 iggroups.cpp:521
         this = (class TriggeredConfigurationGroup * const) 0xf12dbb0
 #1  0x0f135bdc in ?? ()
 No symbol table info available.
 #2  0x0f135be0 in ?? ()
 No symbol table info available.
 #3  0x0965f5c2 in ConfigurationGroup::Save (this=0x7c90e920) at
 mythconfiggroups
 .cpp:99
         this = (class ConfigurationGroup * const) 0xf10e5e8
 #4  0x00000000 in ?? ()
 No symbol table info available.
 (gdb)
 }}}

--

Comment:

 Haven't looked closely at BT or tried to reproduce, but I have seen that
 happen when mythfrontend is run against an empty database (i.e.
 mythconverg with no tables)

-- 
Ticket URL: <http://svn.mythtv.org/trac/ticket/7011#comment:1>
MythTV <http://www.mythtv.org/>
MythTV

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