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seth

Member

Registered: 2012-09-03

Posts: 51,143

Re: [SOLVED] Gnome-Shell Crashed Randomly.....libgjs.so.0.0.0

This looks promising
https://bugzilla.gnome.org/show_bug.cgi?id=783935

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ethernode

Member

Registered: 2006-11-09

Posts: 24

Re: [SOLVED] Gnome-Shell Crashed Randomly.....libgjs.so.0.0.0

Awesome; thanks to your finding i was able to compile gjs as debug:

packages/gjs/trunk$ svn diff PKGBUILD 
Index: PKGBUILD
===================================================================
--- PKGBUILD	(révision 300688)
+++ PKGBUILD	(copie de travail)
@@ -26,7 +26,8 @@
 
 build() {
   cd $pkgname
-  ./configure --prefix=/usr --disable-static --libexecdir=/usr/lib
+  export CXXFLAGS='-g -O0'
+  ./configure --prefix=/usr --disable-static --libexecdir=/usr/lib --enable-debug-symbols=-gdwarf-2
   sed -i -e 's/ -shared / -Wl,-O1,--as-needed\0/g' libtool
   make
 }

After a crash:

$ coredumpctl -1
TIME                            PID   UID   GID SIG COREFILE  EXE
Mon 2017-07-17 15:34:49 CEST  27368  1000  1000  11 present   /usr/bin/gnome-shell

$ coredumpctl gdb 27368
Program terminated with signal SIGSEGV, Segmentation fault.
#0  js::GCMethods<JSObject*>::needsPostBarrier (v=0x7fbc0a9548c0) at /usr/include/mozjs-38/js/RootingAPI.h:663
663	        return v != nullptr && gc::IsInsideNursery(reinterpret_cast<gc::Cell*>(v));
[Current thread is 1 (Thread 0x7fbc7c3d69c0 (LWP 27368))]
(gdb) bt
#0  0x00007fbc7b997945 in js::GCMethods<JSObject*>::needsPostBarrier(JSObject*) (v=0x7fbc0a9548c0) at /usr/include/mozjs-38/js/RootingAPI.h:663
#1  0x00007fbc7b997945 in JS::Heap<JSObject*>::set(JSObject*) (newPtr=0x0, this=0x254c260) at /usr/include/mozjs-38/js/RootingAPI.h:296
#2  0x00007fbc7b997945 in JS::Heap<JSObject*>::operator=(JSObject* const&) (p=<optimized out>, this=0x254c260) at /usr/include/mozjs-38/js/RootingAPI.h:266
#3  0x00007fbc7b997945 in GjsMaybeOwned<JSObject*>::reset() (this=0x254c250) at ./gjs/jsapi-util-root.h:267
#4  0x00007fbc7b997945 in closure_clear_idle(void*) (data=0x254c220) at gi/closure.cpp:133
#5  0x00007fbc79abd8c5 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#6  0x00007fbc79abdc88 in  () at /usr/lib/libglib-2.0.so.0
#7  0x00007fbc79abdfa2 in g_main_loop_run () at /usr/lib/libglib-2.0.so.0
#8  0x00007fbc7b27508c in meta_run () at /usr/lib/libmutter-0.so.0
#9  0x0000000000401ff7 in main ()

wadestone

Member

Registered: 2017-08-06

Posts: 1

Re: [SOLVED] Gnome-Shell Crashed Randomly.....libgjs.so.0.0.0

Thanks for the most promising thread I could find on this problem.  I've been affected by this off and on over the past year.

For what it might be worth: the bt posted above showed me that libmozjs is involved in these freezes.

I noticed that when I have firefox running - and I have gnome-shell-integration installed as an add-on on my platforms and I also use gnome-shell-extension taskbar - these segfaults are catastrophic - meaning they cause me to have to restart lightdm (or gdm - I've used both).  gnome-shell isn't auto-restarted in that case.  I haven't root caused that yet - nor has anyone, I think.

I stopped using firefox for the past few hours - I had generally only been using firefox for gnome-shell-integration and the purpose of management of the gnome extensions, otherwise I use chrome for general browsing, so no big for me to stop using it for now. 

I've seen twice now without using firefox that I still get the segfaults from libgjs.so.0, but gnome-shell auto restarts cleanly - it looks a lot like the behavior seen with a controlled restart using Alt-F2 <r>, for example.

I'll keep watching it.  My first order of business is to stop the catastrophes where I need to restart the display manager.  If it means not keeping firefox running for now - I'll live with it. 

This bug with libgjs dates way back - there seem to be many bug reports that taper off to no resolution.

Again - this back-trace with symbols is a big help - thanks for posting that and the link to the bugzilla-gnome work.

ethernode

Member

Registered: 2006-11-09

Posts: 24

Re: [SOLVED] Gnome-Shell Crashed Randomly.....libgjs.so.0.0.0

gjs patch has ben included in 1.48.6-1 (no need to patch it anymore) but i'm still getting some crashes.