crash of the libcef runnin a gstcef pipeline on a VM

Hi,

Because i wanted to upgrade the cef version i needed to add the h264 support for webrtc usage.

I have used the following version :

CEF 76.0.1+g763dfe6+chromium-76.0.3809.62
Chromium 76.0.3809.62

The build of this cef version that include the h264 support works fine.

Your gstcef module works fine with the cef version that you declare within your CMakelist.txt buy when i overrride yours by replacing your cef files by ours it work file on a computer, not on an Amazon server (Virtualized).

When i start your pipeline test, i always crash with the following trace :+1:

gst-launch-1.0 cefsrc url="https://soundcloud.com/platform/sama" ! queue ! cefdemux name=d   d.video ! video/x-raw ! queue ! videoconvert ! fakesink dump=true
Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
Received signal 11 SEGV_MAPERR 000000000020
#0 0x7fac4492f489 base::debug::CollectStackTrace()
#1 0x7fac448899b3 base::debug::StackTrace::StackTrace()
#2 0x7fac4492f001 base::debug::(anonymous namespace)::StackDumpSignalHandler()
#3 0x7fac3f523890 <unknown>
#4 0x7fac3f51afa0 <unknown>
#5 0x7fac4493a3c8 base::internal::LockImpl::Lock()
#6 0x7fac447b41ba CefFrameHostImpl::RefreshAttributes()
#7 0x7fac44789941 CefBrowserHostImpl::DidFinishNavigation()
#8 0x7fac434a1000 content::WebContentsImpl::DidFinishNavigation()
#9 0x7fac431d4609 content::NavigationHandleImpl::~NavigationHandleImpl()
#10 0x7fac431d491e content::NavigationHandleImpl::~NavigationHandleImpl()
#11 0x7fac431d80dc content::NavigationRequest::~NavigationRequest()
#12 0x7fac431d856e content::NavigationRequest::~NavigationRequest()
#13 0x7fac431afb7d content::FrameTreeNode::ResetNavigationRequest()
#14 0x7fac431d8cf2 content::NavigationRequest::OnRequestFailedInternal()
#15 0x7fac431dd366 content::NavigationRequest::OnRequestFailed()
#16 0x7fac4329ffb0 content::NavigationURLLoaderImpl::OnComplete()
#17 0x7fac448dceca base::TaskAnnotator::RunTask()
#18 0x7fac448ec0be base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::DoWorkImpl()
#19 0x7fac448ebcfe base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::DoSomeWork()
#20 0x7fac448a3fb6 base::MessagePumpGlib::Run()
#21 0x7fac448ecab9 base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::Run()
#22 0x7fac448bf927 base::RunLoop::RunWithTimeout()
#23 0x7fac44797f40 CefDoMessageLoopWork()
#24 0x7fac3637ec82 cef_do_work_func()
#25 0x7fac3f77cd03 <unknown>
#26 0x7fac3f77c285 g_main_context_dispatch
#27 0x7fac3f77c650 <unknown>
#28 0x7fac3f77c962 g_main_loop_run
#29 0x7fac3fce09f3 gst_bus_poll
#30 0x560794d31bb3 <unknown>
#31 0x560794d30a1e <unknown>
#32 0x7fac3f141b97 __libc_start_main
#33 0x560794d310da <unknown>
 r8: 0000000000000000  r9: 00007ffdcafed101 r10: 0000000000000000 r11: 000005e96d22da80
r12: 0000000000000000 r13: 000005e96d1d5e40 r14: 00007ffdcafed098 r15: 000005e96d1a2600
 di: 0000000000000010  si: 00007fac4493a3ae  bp: 00007ffdcafed0c0  bx: 0000000000000010
 dx: 0000000000000010  ax: 00007fac4493a3ae  cx: 0000000000000001  sp: 00007ffdcafed088
 ip: 00007fac3f51afa0 efl: 0000000000010202 cgf: 002b000000000033 erf: 0000000000000004
trp: 000000000000000e msk: 0000000000000000 cr2: 0000000000000020
[end of stack trace]
Calling _exit(1). Core file will not be generated.

And the core dump say :

gdb gst-launch-1.0 /data/cores/core.gst-launch-1.0.23910
bt

[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `gst-launch-1.0 cefsrc url=https://soundcloud.com/platform/sama ! queue ! cefdem'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  __GI___pthread_mutex_lock (mutex=0x10) at ../nptl/pthread_mutex_lock.c:65
65      ../nptl/pthread_mutex_lock.c: No such file or directory.
[Current thread is 1 (Thread 0x7fbe8e0fd740 (LWP 23910))]
(gdb) bt
#0  0x00007fbe8d448fa0 in __GI___pthread_mutex_lock (mutex=0x10) at ../nptl/pthread_mutex_lock.c:65
#1  0x00007fbe874aa188 in base::internal::LockImpl::Lock() () at ./libcef.so
#2  0x00007fbe8732413a in CefFrameHostImpl::RefreshAttributes() () at ./libcef.so
#3  0x00007fbe872f98c1 in CefBrowserHostImpl::DidFinishNavigation(content::NavigationHandle*) () at ./libcef.so
#4  0x00007fbe86010dd0 in content::WebContentsImpl::DidFinishNavigation(content::NavigationHandle*) () at ./libcef.so
#5  0x00007fbe85d443d9 in content::NavigationHandleImpl::~NavigationHandleImpl() () at ./libcef.so
#6  0x00007fbe85d446ee in content::NavigationHandleImpl::~NavigationHandleImpl() () at ./libcef.so
#7  0x00007fbe85d47eac in content::NavigationRequest::~NavigationRequest() () at ./libcef.so
#8  0x00007fbe85d4833e in content::NavigationRequest::~NavigationRequest() () at ./libcef.so
#9  0x00007fbe85d1f94d in content::FrameTreeNode::ResetNavigationRequest(bool, bool) () at ./libcef.so
#10 0x00007fbe85d48ac2 in content::NavigationRequest::OnRequestFailedInternal(network::URLLoaderCompletionStatus const&, bool, base::Optional<std::__1::basic_string<char, std::__1::char_traits<char>, std:
:__1::allocator<char> > > const&, bool) () at ./libcef.so
#11 0x00007fbe85d4d136 in content::NavigationRequest::OnRequestFailed(network::URLLoaderCompletionStatus const&) () at ./libcef.so
#12 0x00007fbe85e0fd80 in content::NavigationURLLoaderImpl::OnComplete(network::URLLoaderCompletionStatus const&) () at ./libcef.so
#13 0x00007fbe8744cd8a in base::TaskAnnotator::RunTask(char const*, base::PendingTask*) () at ./libcef.so
#14 0x00007fbe8745bf7e in base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::DoWorkImpl(base::sequence_manager::LazyNow*, bool*) () at ./libcef.so
#15 0x00007fbe8745bbbe in base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::DoSomeWork() () at ./libcef.so
#16 0x00007fbe8741cd37 in base::(anonymous namespace)::WorkSourceDispatch(_GSource*, int (*)(void*), void*) () at ./libcef.so
#17 0x00007fbe8d6aa417 in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#18 0x00007fbe8d6aa650 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x00007fbe8d6aa6dc in g_main_context_iteration () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007fbe87413e5e in base::MessagePumpGlib::Run(base::MessagePump::Delegate*) () at ./libcef.so
#21 0x00007fbe8745c979 in non-virtual thunk to base::sequence_manager::internal::ThreadControllerWithMessagePumpImpl::Run(bool, base::TimeDelta) () at ./libcef.so
#22 0x00007fbe8742f7e7 in base::RunLoop::RunWithTimeout(base::TimeDelta) () at ./libcef.so
#23 0x00007fbe87307ec0 in CefDoMessageLoopWork() () at ./libcef.so
#24 0x00007fbe8bf73c82 in cef_do_work_func(_GstCefSrc*) () at /overlay/cef-gstreamer/Release/libgstcef.so
#25 0x00007fbe8d6aad03 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007fbe8d6aa285 in g_main_context_dispatch () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007fbe8d6aa650 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007fbe8d6aa962 in g_main_loop_run () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#29 0x00007fbe8dc0e9f3 in gst_bus_poll () at /usr/lib/x86_64-linux-gnu/libgstreamer-1.0.so.0
#30 0x000055820a0b0bb3 in  ()
#31 0x000055820a0afcb7 in  ()
#32 0x00007fbe8d06fb97 in __libc_start_main (main=0x55820a0af460, argc=17, argv=0x7fffc028bce8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffc028bcd8)
   at ../csu/libc-start.c:310
#33 0x000055820a0b00da in  ()

As far i know, google told me that it can be reproduce with a virtualbox image.

The problem seen that one :

I have declare a CEF issue :

https://magpcss.org/ceforum/viewtopic.php?f=10&t=17130&p=43550#p43550

Any idea of the problem ?

Thierry

centricular / gstcefsrc

crash of the libcef runnin a gstcef pipeline on a VM #6