Bug 746648 – deadlock when going to GST_STATE_NULL (download buffer?)

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Bug 746648 - deadlock when going to GST_STATE_NULL (download buffer?)


Summary:	deadlock when going to GST_STATE_NULL (download buffer?)


Status:	RESOLVED OBSOLETE

Product:	GStreamer
Classification:	Platform
Component:	gstreamer (core)
Version:	1.4.5
Hardware:	Other Linux

Importance:	Normal normal
Target Milestone:	NONE
Assigned To:	GStreamer Maintainers
QA Contact:	GStreamer Maintainers

URL:
Whiteboard:

Depends on:
Blocks:

Reported:	2015-03-23 14:09 UTC by Dirk-Jan C. Binnema
Modified:	2018-05-15 09:09 UTC

See Also:
GNOME target:	---
GNOME version:	---

Description Dirk-Jan C. Binnema 2015-03-23 14:09:23 UTC

Most of the deadlocks in saw with 1.4.4 (due to bug #736969) seem to have gone in 1.4.5, but I'm still seeing the below one. This is on ARM; 1.2.x does not show this behavior.


gdb% thread apply all bt
[New Thread 603]
[New Thread 605]
[New Thread 628]
[New Thread 663]
[New Thread 687]
[New Thread 688]
[New Thread 689]

+ Trace 234879

Thread 8 (Thread 689)

#0 syscall
from output/target/lib/libc.so.6
#1 g_mutex_lock_slowpath
from output/target/usr/lib/libglib-2.0.so.0
#2 gst_play_bin_handle_message
from output/target/usr/lib/gstreamer-1.0/libgstplayback.so
#3 bin_bus_handler
from output/target/usr/lib/libgstreamer-1.0.so.0
#4 gst_bus_post
from output/target/usr/lib/libgstreamer-1.0.so.0
#5 gst_element_post_message_default
from output/target/usr/lib/libgstreamer-1.0.so.0
#6 gst_bin_post_message
from output/target/usr/lib/libgstreamer-1.0.so.0
#7 gst_bin_handle_message_func
from output/target/usr/lib/libgstreamer-1.0.so.0
#8 handle_message
from output/target/usr/lib/gstreamer-1.0/libgstplayback.so
#9 bin_bus_handler
from output/target/usr/lib/libgstreamer-1.0.so.0
#10 gst_bus_post
from output/target/usr/lib/libgstreamer-1.0.so.0
#11 gst_element_post_message_default
from output/target/usr/lib/libgstreamer-1.0.so.0
#12 update_buffering
from output/target/usr/lib/gstreamer-1.0/libgstcoreelements.so
#13 ??
#14 ??

Thread 7 (Thread 688)

#0 syscall
from output/target/lib/libc.so.6
#1 g_cond_wait
from output/target/usr/lib/libglib-2.0.so.0
#2 ??
#3 ??

Thread 6 (Thread 687)

#0 syscall
from output/target/lib/libc.so.6
#1 g_mutex_lock_slowpath
from output/target/usr/lib/libglib-2.0.so.0
#2 gst_download_buffer_handle_src_event
from output/target/usr/lib/gstreamer-1.0/libgstcoreelements.so
#3 gst_pad_send_event_unchecked
from output/target/usr/lib/libgstreamer-1.0.so.0
#4 gst_pad_push_event_unchecked
from output/target/usr/lib/libgstreamer-1.0.so.0
#5 gst_pad_push_event
from output/target/usr/lib/libgstreamer-1.0.so.0
#6 event_forward_func
from output/target/usr/lib/libgstreamer-1.0.so.0
#7 gst_pad_forward
from output/target/usr/lib/libgstreamer-1.0.so.0
#8 gst_pad_event_default
from output/target/usr/lib/libgstreamer-1.0.so.0
#9 gst_pad_send_event_unchecked
from output/target/usr/lib/libgstreamer-1.0.so.0
#10 gst_pad_push_event_unchecked
from output/target/usr/lib/libgstreamer-1.0.so.0
#11 gst_pad_push_event
from output/target/usr/lib/libgstreamer-1.0.so.0
#12 gst_type_find_element_src_event
from output/target/usr/lib/gstreamer-1.0/libgstcoreelements.so
#13 gst_pad_send_event_unchecked
from output/target/usr/lib/libgstreamer-1.0.so.0
#14 gst_pad_push_event_unchecked
from output/target/usr/lib/libgstreamer-1.0.so.0
#15 gst_pad_push_event
from output/target/usr/lib/libgstreamer-1.0.so.0
#16 event_forward_func
from output/target/usr/lib/libgstreamer-1.0.so.0
#17 gst_pad_forward
from output/target/usr/lib/libgstreamer-1.0.so.0
#18 gst_pad_event_default
from output/target/usr/lib/libgstreamer-1.0.so.0
#19 gst_qtdemux_handle_src_event
from output/target/usr/lib/gstreamer-1.0/libgstisomp4.so
#20 gst_pad_send_event_unchecked
from output/target/usr/lib/libgstreamer-1.0.so.0
#21 gst_pad_push_event_unchecked
from output/target/usr/lib/libgstreamer-1.0.so.0
#22 gst_pad_push_event
#23 gst_pad_send_event_unchecked
from output/target/usr/lib/libgstreamer-1.0.so.0
#24 gst_pad_push_event_unchecked
from output/target/usr/lib/libgstreamer-1.0.so.0
#25 gst_pad_push_event
from output/target/usr/lib/libgstreamer-1.0.so.0
#26 event_forward_func
from output/target/usr/lib/libgstreamer-1.0.so.0
#27 gst_pad_forward
from output/target/usr/lib/libgstreamer-1.0.so.0
#28 gst_pad_event_default
from output/target/usr/lib/libgstreamer-1.0.so.0
#29 gst_base_parse_src_event_default
from output/target/usr/lib/libgstbase-1.0.so.0
#30 ??
#31 ??

Thread 5 (Thread 663)

#0 syscall
from output/target/lib/libc.so.6
#1 g_mutex_lock_slowpath
from output/target/usr/lib/libglib-2.0.so.0
#2 gst_download_buffer_chain
from output/target/usr/lib/gstreamer-1.0/libgstcoreelements.so
#3 gst_pad_push_data
from output/target/usr/lib/libgstreamer-1.0.so.0
#4 gst_pad_push_data
from output/target/usr/lib/libgstreamer-1.0.so.0
#5 gst_base_src_loop
from output/target/usr/lib/libgstbase-1.0.so.0
#6 gst_task_func
from output/target/usr/lib/libgstreamer-1.0.so.0
#7 g_thread_pool_thread_proxy
from output/target/usr/lib/libglib-2.0.so.0
#8 g_thread_proxy
from output/target/usr/lib/libglib-2.0.so.0
#9 start_thread
from output/target/lib/libpthread.so.0
#10 ??
from output/target/lib/libc.so.6
#11 ??
from output/target/lib/libc.so.6

Thread 4 (Thread 628)

#0 syscall
from output/target/lib/libc.so.6
#1 g_cond_wait_until
from output/target/usr/lib/libglib-2.0.so.0
#2 g_cond_wait_until
from output/target/usr/lib/libglib-2.0.so.0

Thread 1 (Thread 601)

#0 syscall
from output/target/lib/libc.so.6
#1 g_mutex_lock_slowpath
from output/target/usr/lib/libglib-2.0.so.0
#2 gst_play_bin_change_state
from output/target/usr/lib/gstreamer-1.0/libgstplayback.so
#3 gst_element_change_state
from output/target/usr/lib/libgstreamer-1.0.so.0
#4 gst_element_set_state_func
from output/target/usr/lib/libgstreamer-1.0.so.0
#5 tune_pipe_set_state
at tune-pipe.c line 1332
#6 tune_pipe_stop
at tune-pipe.c line 1545
#7 tune_player_stop

Comment 1 Edward Hervey 2018-05-11 12:52:17 UTC

Hi, do you still get this deadlock with current gstreamer ?

Comment 2 Dirk-Jan C. Binnema 2018-05-15 08:56:30 UTC

Haven't seen this in a long time. Feel free to close.

Comment 3 Tim-Philipp Müller 2018-05-15 09:09:06 UTC

Thanks.