[gstreamer-bugs] [Bug 554460] thumbnailer crash in gst_fake_sink_event() on FLUSH_START event

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gstreamer (core) | Ver: 0.10.x

Tim-Philipp Müller changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |UNCONFIRMED
          Component|don't know                  |gstreamer (core)
         Resolution|INCOMPLETE                  |
   Target Milestone|NONE                        |HEAD




------- Comment #3 from Tim-Philipp Müller  2009-05-30 18:29 UTC -------
Actually, this seems to be just another variant of the infamous
GObject-notify-is-not-thread-safe bug. There's a patch [1], but it seems like
getting GObject patches reviewed is hard these days ...

In any case, this can easily be reproduced using the attached unit test. Crash
is here:

gdb) bt
#0  0x0000000000000000 in ?? ()
#1  0x00002b79b9477901 in IA__g_object_notify (object=0x15580f0,
property_name=<value optimized out>) at
/tmp/cdt.XX50MgKl/build-area/glib2.0-2.20.1/gobject/gobjectnotifyqueue.c:125
#2  0x00002b79bb271c2d in gst_fake_sink_event (bsink=0x15580f0,
event=0x15614c0) at gstfakesink.c:370
#3  0x00002b79b8d480be in gst_base_sink_event (pad=0x1546480, event=0x15614c0)
at gstbasesink.c:2783
#4  0x00002b79b91dae58 in gst_pad_send_event (pad=0x1546480, event=0x15614c0)
at gstpad.c:4983
#5  0x00002b79b91db468 in gst_pad_push_event (pad=0x1546300, event=0x15614c0)
at gstpad.c:4839
#6  0x00002b79bb2807af in gst_queue_handle_sink_event (pad=0x1546180,
event=0x15614c0) at gstqueue.c:800
#7  0x00002b79b91dae58 in gst_pad_send_event (pad=0x1546180, event=0x15614c0)
at gstpad.c:4983
#8  0x00002b79b91db468 in gst_pad_push_event (pad=0x1546000, event=0x15614c0)
at gstpad.c:4839
#9  0x00000000004043c8 in oob_source_create (src=0x1544000,
p_buf=0x2b79bb896030) at elements/fakesink.c:884
#10 0x00002b79b8d4b43a in gst_base_src_get_range (src=0x1544000, offset=0,
length=4096, buf=0x2b79bb896030) at gstbasesrc.c:1945
#11 0x00002b79b8d4d543 in gst_base_src_loop (pad=0x1546000) at
gstbasesrc.c:2188

As ugly as it may be, I think we should just hack around this particular bug in
fakesink until this gets fixed in GLib.

[1] http://bugzilla.gnome.org/show_bug.cgi?id=166020#c61


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