Bug 175574 – [GStreamer] gst_gl_shader_attach_unlocked: assertion failed: (shader->context->gl_vtable->IsProgram (shader-> priv->program_handle))

• Status: RESOLVED
• Resolution: FIXED
• Component: Media

[Michael Catanzaro]

Layout test compositing/video/video-object-fit.html sometimes crashes on the following release assert:

STDERR: ERROR:/home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/gst-plugins-bad-1.10.5/gst-libs/gst/gl/gstglshader.c:540:gst_gl_shader_attach_unlocked: assertion failed: (shader->context->gl_vtable->IsProgram (shader-> priv->program_handle))

Crappy backtrace:

Thread 1 (Thread 0x2b1795a48700 (LWP 10255)):
#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
#1  0x00002b137aabb3fa in __GI_abort () at abort.c:89
#2  0x00002b13762d9595 in g_assertion_message () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/glib-2.52.1/glib/gtestutils.c:2433
#3  0x00002b13762d961a in g_assertion_message_expr () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/glib-2.52.1/glib/gtestutils.c:2456
#4  0x00002b13754cee77 in gst_gl_shader_attach_unlocked () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/gst-plugins-bad-1.10.5/gst-libs/gst/gl/gstglshader.c:539
#5  0x00002b13754cef27 in gst_gl_shader_attach () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/gst-plugins-bad-1.10.5/gst-libs/gst/gl/gstglshader.c:577
#6  0x00002b13754cf20b in gst_gl_shader_compile_attach_stage () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/gst-plugins-bad-1.10.5/gst-libs/gst/gl/gstglshader.c:607
#7  0x00002b13754d5267 in _create_shader () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/gst-plugins-bad-1.10.5/gst-libs/gst/gl/gstglcolorconvert.c:1934
#8  _init_convert () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/gst-plugins-bad-1.10.5/gst-libs/gst/gl/gstglcolorconvert.c:2028
#9  _do_convert () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/gst-plugins-bad-1.10.5/gst-libs/gst/gl/gstglcolorconvert.c:2368
#10 0x00002b13754d9683 in _run_message_sync () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/gst-plugins-bad-1.10.5/gst-libs/gst/gl/gstglwindow.c:601
#11 0x00002b13754d9622 in _run_message_async () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/gst-plugins-bad-1.10.5/gst-libs/gst/gl/gstglwindow.c:668
#12 0x00002b13762b35ca in g_main_dispatch () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/glib-2.52.1/glib/gmain.c:3212
#13 g_main_context_dispatch () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/glib-2.52.1/glib/gmain.c:3865
#14 0x00002b13762b3948 in g_main_context_iterate () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/glib-2.52.1/glib/gmain.c:3938
#15 0x00002b13762b3c62 in g_main_loop_run () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/glib-2.52.1/glib/gmain.c:4134
#16 0x00002b13754d96f5 in gst_gl_window_default_run () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/gst-plugins-bad-1.10.5/gst-libs/gst/gl/gstglwindow.c:527
#17 0x00002b13754c295c in gst_gl_context_create_thread () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/gst-plugins-bad-1.10.5/gst-libs/gst/gl/gstglcontext.c:1273
#18 0x00002b13762da315 in g_thread_proxy () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/glib-2.52.1/glib/gthread.c:784
#19 0x00002b1379993494 in start_thread (arg=0x2b1795a48700) at pthread_create.c:333
#20 0x00002b137ab6f93f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

The crash is rare enough that I'm not going to touch the expectations. We just need to fix it.

[Michael Catanzaro]

I changed my mind and added a crash expectation for this test.

[Michael Catanzaro]

Another variant:

Thread 1 (Thread 0x2ad968200700 (LWP 15438)):
#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
#1  0x00002ad8ba12e3fa in __GI_abort () at abort.c:89
#2  0x00002ad8b5c54595 in g_assertion_message () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/glib-2.52.1/glib/gtestutils.c:2433
#3  0x00002ad8b5c5461a in g_assertion_message_expr () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/glib-2.52.1/glib/gtestutils.c:2456
#4  0x00002ad8b4e49b59 in gst_gl_shader_detach_unlocked () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/gst-plugins-bad-1.10.5/gst-libs/gst/gl/gstglshader.c:462
#5  0x00002ad8b4e4a75f in gst_gl_shader_release_unlocked () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/gst-plugins-bad-1.10.5/gst-libs/gst/gl/gstglshader.c:738
#6  0x00002ad8b4e4a7cf in _cleanup_shader () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/gst-plugins-bad-1.10.5/gst-libs/gst/gl/gstglshader.c:103
#7  0x00002ad8b4e3c990 in gst_gl_context_thread_add () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/gst-plugins-bad-1.10.5/gst-libs/gst/gl/gstglcontext.c:1537
#8  0x00002ad8b4e49514 in gst_gl_shader_finalize () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/gst-plugins-bad-1.10.5/gst-libs/gst/gl/gstglshader.c:128
#9  0x00002ad8b5ba402a in g_object_unref () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/glib-2.52.1/gobject/gobject.c:3185
#10 0x00002ad8b4e51379 in _create_shader () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/gst-plugins-bad-1.10.5/gst-libs/gst/gl/gstglcolorconvert.c:1950
#11 _init_convert () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/gst-plugins-bad-1.10.5/gst-libs/gst/gl/gstglcolorconvert.c:2028
#12 _do_convert () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/gst-plugins-bad-1.10.5/gst-libs/gst/gl/gstglcolorconvert.c:2368
#13 0x00002ad8b4e54683 in _run_message_sync () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/gst-plugins-bad-1.10.5/gst-libs/gst/gl/gstglwindow.c:601
#14 0x00002ad8b4e54622 in _run_message_async () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/gst-plugins-bad-1.10.5/gst-libs/gst/gl/gstglwindow.c:668
#15 0x00002ad8b5c2e5ca in g_main_dispatch () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/glib-2.52.1/glib/gmain.c:3212
#16 g_main_context_dispatch () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/glib-2.52.1/glib/gmain.c:3865
#17 0x00002ad8b5c2e948 in g_main_context_iterate () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/glib-2.52.1/glib/gmain.c:3938
#18 0x00002ad8b5c2ec62 in g_main_loop_run () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/glib-2.52.1/glib/gmain.c:4134
#19 0x00002ad8b4e546f5 in gst_gl_window_default_run () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/gst-plugins-bad-1.10.5/gst-libs/gst/gl/gstglwindow.c:527
#20 0x00002ad8b4e3d95c in gst_gl_context_create_thread () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/gst-plugins-bad-1.10.5/gst-libs/gst/gl/gstglcontext.c:1273
#21 0x00002ad8b5c55315 in g_thread_proxy () at /home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/glib-2.52.1/glib/gthread.c:784
#22 0x00002ad8b9006494 in start_thread (arg=0x2ad968200700) at pthread_create.c:333
#23 0x00002ad8ba1e293f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

STDERR: 
STDERR: warning: core file may not match specified executable file.
STDERR: 51	../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
STDERR: **
STDERR: ERROR:/home/slave/webkitgtk/gtk-linux-64-release-tests/build/WebKitBuild/DependenciesGTK/Source/gst-plugins-bad-1.10.5/gst-libs/gst/gl/gstglshader.c:463:gst_gl_shader_detach_unlocked: assertion failed: (shader->context->gl_vtable->IsProgram (shader-> priv->program_handle))

Adding crash expectation for compositing/visibility/visibility-simple-video-layer.html.

I worry this crash could cause flakiness for a large number of tests.

[Philippe Normand]

Both tests are green these days. Closing.