dx-packages team mailing list archive

Thread
Date
[Bug 1337244] Re: compiz crashed with SIGSEGV in nux::WindowThread::ComputeQueuedLayout()

To: dx-packages@xxxxxxxxxxxxxxxxxxx
From: Margarita Manterola <marga@xxxxxxxxxx>
Date: Fri, 04 Jul 2014 08:55:59 -0000
Reply-to: Bug 1337244 <1337244@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
This keeps happening over and over.  Looking at the resolution of the
other bug, I expect the code that needs to be fixed is not here, but in
the handling of some element in this queue.  I suspect some element is
getting deleted and the memory reused without it being removed from the
queue.

Here's the latest stacktrace:
#0  0x0000000000000000 in ?? ()
#1  0x00007fdd0a32c75d in nux::WindowThread::ComputeQueuedLayout (this=this@entry=0x2319f40) at ./WindowThread.cpp:318
#2  0x00007fdd0a32db28 in nux::WindowThread::RenderInterfaceFromForeignCmd (this=0x2319f40, clip=...) at ./WindowThread.cpp:1627
#3  0x00007fdd0ba61389 in unity::UnityScreen::paintDisplay() () from /usr/lib/compiz/libunityshell.so
#4  0x00007fdd0ba61748 in unity::UnityScreen::glPaintOutput(GLScreenPaintAttrib const&, GLMatrix const&, CompRegion const&, CompOutput*, unsigned int) () from /usr/lib/compiz/libunityshell.so
#5  0x00007fdd1b3da272 in GLScreen::glPaintOutput(GLScreenPaintAttrib const&, GLMatrix const&, CompRegion const&, CompOutput*, unsigned int) ()
  from /usr/lib/compiz/libopengl.so
#6  0x00007fdd1b3daed4 in PrivateGLScreen::paintOutputs(std::list<CompOutput*, std::allocator<CompOutput*> >&, unsigned int, CompRegion const&) ()
  from /usr/lib/compiz/libopengl.so
#7  0x00007fdd203e144f in CompositeScreen::paint(std::list<CompOutput*, std::allocator<CompOutput*> >&, unsigned int) ()
  from /usr/lib/compiz/libcomposite.so
#8  0x00007fdd203e4af2 in CompositeScreen::handlePaintTimeout() () from /usr/lib/compiz/libcomposite.so
#9  0x00007fdd2cc6b53d in CompTimer::triggerCallback() () from /usr/lib/libcompiz_core.so.ABI-20140123
#10 0x00007fdd2cc6b5ef in CompTimeoutSource::callback() () from /usr/lib/libcompiz_core.so.ABI-20140123
#11 0x00007fdd2cc6ab4d in CompTimeoutSource::dispatch(sigc::slot_base*) () from /usr/lib/libcompiz_core.so.ABI-20140123
#12 0x00007fdd2b15735f in Glib::Source::dispatch_vfunc(_GSource*, int (*)(void*), void*) () from /usr/lib/x86_64-linux-gnu/libglibmm-2.4.so.1
#13 0x00007fdd2ac49ce5 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#14 0x00007fdd2ac4a048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#15 0x00007fdd2ac4a30a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#16 0x00007fdd2cc260eb in compiz::private_screen::EventManager::startEventLoop(_XDisplay*) () from /usr/lib/libcompiz_core.so.ABI-20140123
#17 0x0000000000401971 in main ()

-- 
You received this bug notification because you are a member of DX
Packages, which is subscribed to unity in Ubuntu.
Matching subscriptions: dx-packages
https://bugs.launchpad.net/bugs/1337244

Title:
  compiz crashed with SIGSEGV in
  nux::WindowThread::ComputeQueuedLayout()

Status in “unity” package in Ubuntu:
  New

Bug description:
  Hi, this is basically the same bug as
  https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1298202, but that
  bug is marked as Fix Released with Unity 7.2.0, and I'm still seeing
  this bug on trusty, with the latest Unity version (unity
  7.2.1+14.04.20140513-0ubuntu2).  I already mentioned in that bug that
  I was still seeing it quite a while ago, but got no reply to that.

  Crashes are being experienced in multiple machines, while unlocking
  the screen.  The stacktraces vary, but they always fail in the same
  function and same line.

  First stacktrace:
  #0  0x0000000000000410 in ?? ()
  #1  0x00007fd4bf4eb75d in nux::WindowThread::ComputeQueuedLayout (this=this@entry=0x22c1990) at ./WindowThread.cpp:318
  #2  0x00007fd4bf4ecb28 in nux::WindowThread::RenderInterfaceFromForeignCmd (this=0x22c1990, clip=...) at ./WindowThread.cpp:1627
  #3  0x00007fd4c0c20389 in unity::UnityScreen::paintDisplay() () from /usr/lib/compiz/libunityshell.so
  #4  0x00007fd4c0c20748 in unity::UnityScreen::glPaintOutput(GLScreenPaintAttrib const&, GLMatrix const&, CompRegion const&, CompOutput*, unsigned int)
     () from /usr/lib/compiz/libunityshell.so
  #5  0x00007fd4d4f2e272 in GLScreen::glPaintOutput(GLScreenPaintAttrib const&, GLMatrix const&, CompRegion const&, CompOutput*, unsigned int) ()
    from /usr/lib/compiz/libopengl.so
  #6  0x00007fd4d4f2eed4 in PrivateGLScreen::paintOutputs(std::list<CompOutput*, std::allocator<CompOutput*> >&, unsigned int, CompRegion const&) ()
    from /usr/lib/compiz/libopengl.so
  #7  0x00007fd4d556944f in CompositeScreen::paint(std::list<CompOutput*, std::allocator<CompOutput*> >&, unsigned int) ()
    from /usr/lib/compiz/libcomposite.so
  #8  0x00007fd4d556caf2 in CompositeScreen::handlePaintTimeout() () from /usr/lib/compiz/libcomposite.so
  #9  0x00007fd4e12c053d in CompTimer::triggerCallback() () from /usr/lib/libcompiz_core.so.ABI-20140123
  #10 0x00007fd4e12c05ef in CompTimeoutSource::callback() () from /usr/lib/libcompiz_core.so.ABI-20140123
  #11 0x00007fd4e12bfb4d in CompTimeoutSource::dispatch(sigc::slot_base*) () from /usr/lib/libcompiz_core.so.ABI-20140123
  #12 0x00007fd4df7ac35f in Glib::Source::dispatch_vfunc(_GSource*, int (*)(void*), void*) () from /usr/lib/x86_64-linux-gnu/libglibmm-2.4.so.1
  #13 0x00007fd4df29ece5 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
  #14 0x00007fd4df29f048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
  #15 0x00007fd4df29f30a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
  #16 0x00007fd4e127b0eb in compiz::private_screen::EventManager::startEventLoop(_XDisplay*) () from /usr/lib/libcompiz_core.so.ABI-20140123
  #17 0x0000000000401971 in main ()

  Second stacktrace (different machine):
  #0  0x00007f0058407ed0 in nux_area_accessible_check_pending_notification () from /usr/lib/compiz/libunityshell.so
  #1  0x00007f0056cb175d in nux::WindowThread::ComputeQueuedLayout (this=this@entry=0x1d530e0) at ./WindowThread.cpp:318
  #2  0x00007f0056cb2b28 in nux::WindowThread::RenderInterfaceFromForeignCmd (this=0x1d530e0, clip=...) at ./WindowThread.cpp:1627
  #3  0x00007f00583e6389 in unity::UnityScreen::paintDisplay() () from /usr/lib/compiz/libunityshell.so
  #4  0x00007f00583e6748 in unity::UnityScreen::glPaintOutput(GLScreenPaintAttrib const&, GLMatrix const&, CompRegion const&, CompOutput*, unsigned int) () from /usr/lib/compiz/libunityshell.so
  #5  0x00007f00705e2272 in GLScreen::glPaintOutput(GLScreenPaintAttrib const&, GLMatrix const&, CompRegion const&, CompOutput*, unsigned int) ()
    from /usr/lib/compiz/libopengl.so
  #6  0x00007f00705e2ed4 in PrivateGLScreen::paintOutputs(std::list<CompOutput*, std::allocator<CompOutput*> >&, unsigned int, CompRegion const&) ()
    from /usr/lib/compiz/libopengl.so
  #7  0x00007f0070c1d44f in CompositeScreen::paint(std::list<CompOutput*, std::allocator<CompOutput*> >&, unsigned int) ()
    from /usr/lib/compiz/libcomposite.so
  #8  0x00007f0070c20af2 in CompositeScreen::handlePaintTimeout() () from /usr/lib/compiz/libcomposite.so
  #9  0x00007f007879b53d in CompTimer::triggerCallback() () from /usr/lib/libcompiz_core.so.ABI-20140123
  #10 0x00007f007879b5ef in CompTimeoutSource::callback() () from /usr/lib/libcompiz_core.so.ABI-20140123
  #11 0x00007f007879ab4d in CompTimeoutSource::dispatch(sigc::slot_base*) () from /usr/lib/libcompiz_core.so.ABI-20140123
  #12 0x00007f0076c8735f in Glib::Source::dispatch_vfunc(_GSource*, int (*)(void*), void*) () from /usr/lib/x86_64-linux-gnu/libglibmm-2.4.so.1
  #13 0x00007f0076779ce5 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
  #14 0x00007f007677a048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
  #15 0x00007f007677a30a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
  #16 0x00007f00787560eb in compiz::private_screen::EventManager::startEventLoop(_XDisplay*) () from /usr/lib/libcompiz_core.so.ABI-20140123
  #17 0x0000000000401971 in main ()

  I have more, but I don't know how useful it is to add them all.

  All stacktraces have this as #1:
  #1 0x00007fd4bf4eb75d in nux::WindowThread::ComputeQueuedLayout (this=this@entry=0x22c1990) at ./WindowThread.cpp:318

  This is the affected code:

  void WindowThread::ComputeQueuedLayout()
   {
     StartLayoutCycle();
     std::list<Area *>::iterator it;

     for (it = _queued_layout_list.begin(); it != _queued_layout_list.end(); ++it)
     {
       Area *area = *it;

       if (area->Type().IsDerivedFromType(View::StaticObjectType))

  The last line is 318.

  I expect there is some item in the _queued_layout_list that is getting
  corrupted.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1337244/+subscriptions
References

[Bug 1337244] [NEW] compiz crashed with SIGSEGV in nux::WindowThread::ComputeQueuedLayout()
From: Margarita Manterola, 2014-07-03