Bug 742500 – [gstreamer crashed when log was set 4 or larger]

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Bug 742500 - [gstreamer crashed when log was set 4 or larger]


Summary:	[gstreamer crashed when log was set 4 or larger]


Status:	RESOLVED OBSOLETE

Product:	GStreamer
Classification:	Platform
Component:	gstreamer (core)
Version:	0.10.35
Hardware:	Other Linux

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

URL:
Whiteboard:

Depends on:
Blocks:

Reported:	2015-01-07 01:14 UTC by Michael Xiang
Modified:	2015-01-07 12:09 UTC

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

Attachments
crashed log (6.04 KB, text/plain) 2015-01-07 01:14 UTC, Michael Xiang	Details

Description Michael Xiang 2015-01-07 01:14:35 UTC

Created attachment 293994 [details]
crashed log 

[Enviroment]:
   gcc version 4.6.2 20110630
   gstreamer-0.10.35
[Operation]:
   set log env variable: GST_DEBUG=4 
[Result]:
   gstreamer crashed.
   The call stack shows below:
   Why does the gst always crash at IA__g_strdup_vprintf function? 
 ========================================================================
 #0  gst_debug_print_segment (ptr=0x134) at gstinfo.c:715

+ Trace 234515

#1 _gst_info_printf_extension_segment
at gstinfo.c line 1659
#2 vfprintf
from /lib/libc.so.6
#3 vsnprintf
from /lib/libc.so.6
#4 snprintf
from /lib/libc.so.6
#5 Log_Signal_Data
at support/core/bb_signal_dbg/bb_signal_dbg_imp/_src/signal_dbg.c line 254
#6 Log_Signal_Info
at support/core/bb_signal_dbg/bb_signal_dbg_imp/_src/signal_dbg.c line 309
#7 Signal_Handler
at support/core/bb_signal_dbg/bb_signal_dbg_imp/_src/signal_dbg.c line 333
#8 <signal handler called>
#9 gst_debug_print_segment
at gstinfo.c line 715
#10 _gst_info_printf_extension_segment
at gstinfo.c line 1659
#11 vfprintf
from /lib/libc.so.6
#12 vsnprintf
from /lib/libc.so.6
#13 snprintf
from /lib/libc.so.6
#14 Log_Signal_Data
at support/core/bb_signal_dbg/bb_signal_dbg_imp/_src/signal_dbg.c line 254
#15 Log_Signal_Info
at support/core/bb_signal_dbg/bb_signal_dbg_imp/_src/signal_dbg.c line 309
#16 Signal_Handler
at support/core/bb_signal_dbg/bb_signal_dbg_imp/_src/signal_dbg.c line 333
#17 <signal handler called>
#18 raise
from /lib/libc.so.6
#19 abort
from /lib/libc.so.6
#20 _g_gnulib_vasnprintf
at vasnprintf.c line 1026
#21 _g_gnulib_vasprintf
at printf.c line 144
#22 IA__g_vasprintf
at gprintf.c line 309
#23 IA__g_strdup_vprintf
at gstrfuncs.c line 244
#24 gst_debug_message_get
at gstinfo.c line 553
#25 gst_debug_log_default
at gstinfo.c line 960
#26 gst_debug_log_default
at gstinfo.c line 921
#27 gst_debug_log_valist
#28 gst_debug_log
#29 gst_registry_add_feature
at gstregistry.c line 556
#30 gst_element_register
at gstelementfactory.c line 320
#31 gst_register_core_elements
at gst.c line 628
#32 gst_plugin_register_func
at gstplugin.c line 557
#33 gst_plugin_register_func
at gstplugin.c line 514
#34 gst_plugin_register_static
at gstplugin.c line 254
#35 init_post
at gst.c line 769
#36 init_post
at gst.c line 650
#37 IA__g_option_context_parse
at goption.c line 1947
#38 gst_init_check
at gst.c line 439
#39 gst_init
at gst.c line 493
#40 AVP_Initialize
at support/media/bbc_audio_video_player/bb_audio_video_player/_src/audio_video_player.c line 2976
#41 Process_Message
at support/media/bbc_audio_video_player/bb_avp_proxy/bb_avp_proxy_server/bb_avp_proxy_server_imp/_src/avp_proxy_server.c line 457
#42 AVP_Proxy_Server_Thread_Task
at support/media/bbc_audio_video_player/bb_avp_proxy/bb_avp_proxy_server/bb_avp_proxy_server_imp/_src/avp_proxy_server.c line 538
#43 SAL_I_Start_User_Thread
at support/os/bb_xsal/bb_xsal_src/common/xsal_create_thread.c line 169
#44 start_thread
from /lib/libpthread.so.0
#45 clone
from /lib/libc.so.6

Comment 1 Michael Xiang 2015-01-07 02:19:54 UTC

glib version：glib-2.22.1

Comment 2 Tim-Philipp Müller 2015-01-07 12:09:09 UTC

Thanks for the bug report. However, GStreamer 0.10 is no longer maintained. Feel free to file a new bug or re-open this bug if you can still reproduce the issue with a recent version of GStreamer 1.x, thanks!

Looking at the issue itself, it looks like there's some kind of configure/build-time mismatch.

The debug log string being printed is this:

GST_DEBUG_OBJECT (registry, "adding feature %p (%s)", feature, feature->name);

Which should print a pointer value and a string.

There are no printf extension formats being used here, yet the crash ends up in _gst_info_printf_extension_*. I have no idea why that would be the case.

You  can try if the patch/commit from https://bugzilla.gnome.org/show_bug.cgi?id=638599 helps, otherwise I'm out of ideas, sorry.

This should no longer be an issue in recent 1.x versions, since we do this differently there (with our own printf implementation).