[mythtv-commits] Ticket #1807: mythfrontend 0.19-fixes svn 9926 crashing in OSDImageCacheValue::GetSize()

[MythTV]

#1807: mythfrontend 0.19-fixes svn 9926 crashing in OSDImageCacheValue::GetSize()
--------------------------------+-------------------------------------------
 Reporter:  dscoular at gmail.com  |       Owner:  danielk
     Type:  defect              |      Status:  new    
 Priority:  minor               |   Milestone:  unknown
Component:  mythtv              |     Version:  0.19   
 Severity:  medium              |  
--------------------------------+-------------------------------------------
 Hi,

 I just downloaded the latest 9926 svn of 0.19-fixes and I get a 100%
 repeatable frontend
 crash whenever I hit the menu key in livetv. Note that the menu works fine
 on recordings.

 I recompiled with debug and got rid of xvmc and friends... in fact I only
 enable dvb and
 the debug compile options to reduce the variables. It still 100%
 reproducable on live-tv only.


 {{{
 Program received signal SIGSEGV, Segmentation fault.
 [Switching to Thread 131080 (LWP 7979)]
 0xb7a4474e in OSDImageCacheValue::GetSize (this=0xf3e95c0)
     at osdimagecache.h:23
 23          uint    GetSize(void) const { return m_size_in_bytes; }
 }}}
 (gdb) '''p m_size_in_bytes'''
 {{{
 Cannot access memory at address 0xa00905be
 }}}


 Not sure why I cannot access m_size_in_bytes... this would seem to be the
 crux
 of the problem.

 Here's the gdb backtrace:

 (gdb) bt

 {{{
 #0  0xb7a4474e in OSDImageCacheValue::GetSize (this=0xf3e95c0)
     at osdimagecache.h:23
 #1  0xb7a4347f in OSDImageCache::Insert (this=0xb7ec49c0, value=0xf3e95c0)
     at osdimagecache.cpp:224
 #2  0xb7a2b25e in OSDTypeImage::LoadImage (this=0x876c4a0,
     filename=@0xb2a57874, wmult=0.824999988, hmult=1.20208335, scalew=-1,
     scaleh=-1) at osdtypes.cpp:873
 #3  0xb7a3d239 in OSDListBtnType::LoadPixmap (this=0x876c1e0,
 pix=@0x876c4a0,
     fileName=@0xb2a57904) at osdlistbtntype.cpp:679
 #4  0xb7a3c8bd in OSDListBtnType::Init (this=0x876c1e0)
     at osdlistbtntype.cpp:601
 #5  0xb7a3d98e in OSDListBtnTypeItem (this=0x89324b0, lbtype=0x876c1e0,
     text=@0xb2a57a64, pixmap=0x0, checkable=false, showArrow=false,
     state=NotChecked) at osdlistbtntype.cpp:695
 #6  0xb7a39ecd in OSDListTreeType::FillLevelFromTree (this=0x834af40,
     item=0x8979418, level_num=0) at osdlistbtntype.cpp:296
 #7  0xb7a39163 in OSDListTreeType::SetAsTree (this=0x834af40,
     toplevel=0x8979418, select_list=0x0) at osdlistbtntype.cpp:184
 #8  0xb7a208b5 in OSD::ShowTreeMenu (this=0x8958bc8, name=@0xb2a57bc4,
     treeToShow=0x8979418) at osd.cpp:2355
 #9  0xb79b1d40 in TV::ShowOSDTreeMenu (this=0xb3a11030) at
 tv_play.cpp:5532
 #10 0xb7996f6b in TV::ProcessKeypress (this=0xb3a11030, e=0xaef00540)
     at tv_play.cpp:2372

 }}}

 Also:

 5
 {{{
 532            OSDListTreeType *tree = GetOSD()->ShowTreeMenu("menu",
 treeMenu);
 }}}


 The parameters passed to ShowTreeMenu appear to be a static string "menu"
 and
 a treeMenu object which contains the following prior to the SIGSEGV:

 (gdb) p *treeMenu
 $2 = {<GenericTree> = {_vptr.GenericTree = 0xb7efe820, m_string = {
       static null = {
         static null = <same as static member of an already seen type>,
         d = 0x817ee00, static shared_null = 0x817ee00}, d = 0xaef02c30,
       static shared_null = 0x817ee00}, m_int = 0, m_subnodes = 0xaef02dc0,
     m_ordered_subnodes = 0xaef02df0, m_flatened_subnodes = 0xaef02e20,
     m_selected_subnode = 0x0, m_attributes = 0xaef02c48, m_parent = 0x0,
     m_selectable = false, m_current_ordering_index = -1}, m_image = 0x0,
   m_action = {static null = {
       static null = <same as static member of an already seen type>,
       d = 0x817ee00, static shared_null = 0x817ee00}, d = 0xaef02b90,
     static shared_null = 0x817ee00}, m_group = {static null = {
       static null = <same as static member of an already seen type>,
       d = 0x817ee00, static shared_null = 0x817ee00}, d = 0xaef02b90,
     static shared_null = 0x817ee00}, m_checkable = -1, m_parentButton =
 0x0}

 The call before the GetSize looks like this in the debugger:

 Breakpoint 1, OSDTypeImage::LoadImage (this=0x855ede0,
 filename=@0x855ee34,
     wmult=0.824999988, hmult=1.20208335, scalew=-1, scaleh=-1)
     at osdtypes.cpp:792
 792         QString ckey;

 I'm running a gentoo system with qt-3.3.4 and a 2.6.15-gentoo-r5 SMP
 kernel. The card is
 an old Hauppauge Nova-T DVB-T card with the tda1004x frontend.

 If I can be of any more help please do not hesitate to contact me!

 Cheers,

 Doug

-- 
Ticket URL: <http://svn.mythtv.org/trac/ticket/1807>
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