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List:       gstreamer-devel
Subject:    Re: Crash when using glimagesink
From:       Chris Tapp <opensource () keylevel ! com>
Date:       2014-10-31 22:05:54
Message-ID: AD9AEB76-9D07-459B-89B1-8405C78A1BF7 () keylevel ! com
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On 31 Oct 2014, at 09:50, Tim Müller <tim@centricular.com> wrote:

> On Fri, 2014-10-31 at 00:04 +0000, Chris Tapp wrote:
> > I get a crash under 1.4.3 when I run:
> > 
> > gst-launch-1.0 playbin uri=http://dvb:4242/bysid/4352 video-sink="glimagesink"
> > 
> > This only happens when I use glimagesink
> > 
> > The back trace shows:
> > 
> > Got context from element 'glimagesink0': gst.gl.GLDisplay=context, \
> > gst.gl.GLDisplay=(GstGLDisplay)"\(GstGLDisplayX11\)\ gldisplayx11-0"; Caught \
> > SIGSEGV%   #0  0x42c9f291 in poll () at ../sysdeps/unix/syscall-template.S:81
> > #1  0x4229fbbb in g_poll (fds=0x8153468, nfds=2, timeout=-1) at gpoll.c:132
> > #2  0x42291590 in g_main_context_poll (n_fds=2, fds=0x8153468, 
> > #3  g_main_context_iterate (context=0x8153300, block=block@entry=1, 
> > #4  0x42291a63 in g_main_loop_run (loop=0x813f1e8) at gmain.c:3340
> > #5  0x4299afe2 in gst_bus_poll (bus=bus@entry=0x810f628, 
> > #6  0x0804b4ae in event_loop (pipeline=0x8133c30, blocking=blocking@entry=1, 
> > #7  0x0804a985 in main (argc=4, argv=0xbfca0c24) at gst-launch.c:1049
> > 
> > Any idea where I should be looking to try and understand what's causing this? The \
> > system is using GLES2.
> 
> Try getting a stack trace of all threads for starters, with:
> 
> (gdb) thread apply all bt
> 
> I'm pretty sure it does not crash in poll() :)

Hmmm... Lots of stuff... This looks like it may be important:

Thread 2 (Thread 0xadeffb40 (LWP 2059)):
#0  0x42d54b6c in nanosleep () at ../sysdeps/unix/syscall-template.S:81
#1  0x422b71ee in g_usleep (microseconds=microseconds@entry=1000000) at gtimer.c:259
#2  0x0804b304 in fault_spin () at gst-launch.c:109
#3  fault_handler_sighandler (signum=11) at gst-launch.c:90
#4  <signal handler called>
#5  0x00000000 in ?? ()
#6  0xb7583670 in _gen_texture (context=0xb6017800, data=0xb5efe630) at \
gstglutils.c:112 #7  0xb756d448 in _gst_gl_context_thread_run_generic \
(data=0xb5efe604) at gstglcontext.c:949 #8  0xb75818b1 in _run_message_sync \
(message=0xb5efe590) at gstglwindow.c:341 #9  0xb7585fb8 in _run_message \
(message=message@entry=0xb6005460) at gstglwindow_x11.c:598 #10 0x4228ed50 in \
g_idle_dispatch (source=source@entry=0xb6019970, callback=0xb7585f90 <_run_message>, \
user_data=0xb6005460) at gmain.c:4657 #11 0x42291273 in g_main_dispatch \
(context=0xb4dfdda0) at gmain.c:2539 #12 g_main_context_dispatch \
(context=context@entry=0xb4dfdda0) at gmain.c:3075 #13 0x42291610 in \
g_main_context_iterate (context=0xb4dfdda0, block=block@entry=1, \
dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3146 #14 0x42291a63 in \
g_main_loop_run (loop=0xb4debc88) at gmain.c:3340 #15 0xb7586011 in \
gst_gl_window_x11_run (window=0xb6018028) at gstglwindow_x11.c:448 #16 0xb7581ce1 in \
gst_gl_window_run (window=0xb6018028) at gstglwindow.c:296 #17 0xb756e826 in \
gst_gl_context_create_thread (context=0xb6017800) at gstglcontext.c:845 #18 \
0x422b5883 in g_thread_proxy (data=0xb60059b0) at gthread.c:801 #19 0x42d4db37 in \
start_thread (arg=0xadeffb40) at pthread_create.c:311 #20 0x42cad6fe in clone () at \
../sysdeps/unix/sysv/linux/i386/clone.S:132


#5 looks bad to me!
--

Chris Tapp
opensource@keylevel.com
www.keylevel.com

----
You can tell you're getting older when your car insurance gets real cheap!

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