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Thread: sigsegv ?

  1. 28th November 2009, 15:31 #1
    mero
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    Default sigsegv ?

    Sometimes I got sigsegv in my application and I can't find what is wrong...
    Anyone ?

    Qt Code: 
    1. Program received signal SIGSEGV, Segmentation fault.
    2. malloc_consolidate (av=<value optimized out>) at malloc.c:5089
    3. 5089    malloc.c: No such file or directory.                  
    4.         in malloc.c                                           
    5. Current language:  auto                                       
    6. The current source language is "auto; currently c".           
    7. (gdb) bt                                                      
    8. #0  malloc_consolidate (av=<value optimized out>) at malloc.c:5089
    9. #1  0x00b034b2 in _int_malloc (av=<value optimized out>, bytes=<value optimized out>) at malloc.c:4338
    10. #2  0x00b05868 in *__GI___libc_malloc (bytes=16404) at malloc.c:3638                                  
    11. #3  0x004c56bd in qMalloc (size=16404) at global/qmalloc.cpp:55                                       
    12. #4  0x004ce32b in QByteArray::resize (this=0x8b5b094, size=16384) at tools/qbytearray.cpp:1336        
    13. #5  0x00557693 in QRingBuffer::clear (this=0x8b5ac78) at ../../include/QtCore/private/../../../src/corelib/tools/qringbuffer_p.h:206
    14. #6  QRingBuffer (this=0x8b5ac78) at ../../include/QtCore/private/../../../src/corelib/tools/qringbuffer_p.h:66                      
    15. #7  QIODevicePrivate (this=0x8b5ac78) at io/qiodevice.cpp:121                                                                       
    16. #8  0x0054e71f in QFilePrivate (this=0x8b5ac78) at io/qfile.cpp:93                                                                  
    17. #9  0x0054ebb3 in QFile (this=0xbfffeaf8, name=...) at io/qfile.cpp:383                                                             
    18. #10 0x00586192 in QConfFileSettingsPrivate::syncConfFile (this=0x8115318, confFileNo=1) at io/qsettings.cpp:1443                    
    19. #11 0x005872e3 in QConfFileSettingsPrivate::sync (this=0x8115318) at io/qsettings.cpp:1387                                          
    20. ---Type <return> to continue, or q <return> to quit---                                                                              
    21. #12 0x0057b641 in QConfFileSettingsPrivate::flush (this=0x8115318) at io/qsettings.cpp:1394                                         
    22. #13 0x0057b622 in QSettingsPrivate::update (this=0x8115318) at io/qsettings.cpp:405                                                 
    23. #14 0x0057bc20 in QSettings::event (this=0x8c1d400, event=0xbd73d0) at io/qsettings.cpp:3330                                        
    24. #15 0x01094f54 in QApplicationPrivate::notify_helper (this=0x80d1220, receiver=0xbffff244, e=0x88f35d8) at kernel/qapplication.cpp:4056
    25. #16 0x0109c67c in QApplication::notify (this=0xbffff2d8, receiver=0xbffff244, e=0x88f35d8) at kernel/qapplication.cpp:3603             
    26. #17 0x005bb6cb in QCoreApplication::notifyInternal (this=0xbffff2d8, receiver=0xbffff244, event=0x88f35d8) at kernel/qcoreapplication.cpp:610
    27. #18 0x005bc2b2 in QCoreApplication::sendEvent (receiver=0x0, event_type=0, data=0x80d12f0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:213
    28. #19 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x80d12f0) at kernel/qcoreapplication.cpp:1247                                    
    29. #20 0x005bc47d in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0) at kernel/qcoreapplication.cpp:1140                                             
    30. #21 0x005e63ff in QCoreApplication::sendPostedEvents (s=0x80d9b10) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:218                        
    31. #22 postEventSourceDispatch (s=0x80d9b10) at kernel/qeventdispatcher_glib.cpp:210                                                                                 
    32. #23 0x00c90e78 in g_main_dispatch (context=0x80d9a90) at /build/buildd/glib2.0-2.22.2/glib/gmain.c:1960                                                           
    33. ---Type <return> to continue, or q <return> to quit---
    34. #24 IA__g_main_context_dispatch (context=0x80d9a90) at /build/buildd/glib2.0-2.22.2/glib/gmain.c:2513
    35. #25 0x00c94720 in g_main_context_iterate (context=0x80d9a90, block=<value optimized out>, dispatch=1, self=0x80d72c8) at /build/buildd/glib2.0-2.22.2/glib/gmain.c:2591
    36. #26 0x00c94853 in IA__g_main_context_iteration (context=0x80d9a90, may_block=1) at /build/buildd/glib2.0-2.22.2/glib/gmain.c:2654
    37. #27 0x005e602c in QEventDispatcherGlib::processEvents (this=0x80d7028, flags=...) at kernel/qeventdispatcher_glib.cpp:327
    38. #28 0x01135be5 in QGuiEventDispatcherGlib::processEvents (this=0x80d7028, flags=...) at kernel/qguieventdispatcher_glib.cpp:202
    39. #29 0x005b9c79 in QEventLoop::processEvents (this=0xbffff1c4, flags=DWARF-2 expression error: DW_OP_reg operations must be used either alone or in conjuction with DW_OP_piece.
    40. ) at kernel/qeventloop.cpp:149
    41. #30 0x005ba0ca in QEventLoop::exec (this=0xbffff1c4, flags=...) at kernel/qeventloop.cpp:201
    42. #31 0x005bc53f in QCoreApplication::exec () at kernel/qcoreapplication.cpp:888
    43. #32 0x01094dd7 in QApplication::exec () at kernel/qapplication.cpp:3525
    44. #33 0x0808c067 in main (argc=1, argv=0xbffff3d4) at /home/mero/Projekty_moje/otwarte/sourceforge.net/SCC/scc/src/main.cpp:64
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  2. 28th November 2009, 18:01 #2
    squidge
    squidge is offline Expert
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    Default Re: sigsegv ?

    Since the sigsegv is in malloc.c, I think it's safe to assume you have memory corruption somewhere in your app.
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