openjdk team mailing list archive

[Grant Gayed <grant_gayed@xxxxxxxxxx>]

I've traced through the WebKitGTK source and identified all paths that
lead to webkitWebViewRegisterForIconNotification().  Once the icons
database has been disabled these paths all detect this and run away
before making this call.  By running a WebKitGTK instrumented with
fprintf's the only way I can see this function possibly being
encountered is if one of these paths happens before the database has
been disabled.

The Browser's first invocation of webkit_get_favicon_database(), which
is needed in order to disable it, seems like the only place where this
could happen in theory, because it creates a background thread that can
ultimately invoke webkitWebViewRegisterForIconNotification() after re-
joining the main thread.  The timing of this re-join is of course
variable.  In testing I was never able to get this case to actually
happen, but I did see some variance in ordering that occurred as a
result of the thread join happening at different times.

I've changed the fix in the 4.4 stream to only run for the first
WebKitGTK-based Browser since the icons database is shared amongst all
instances.  I'd like to put the change in 4.3.1, and am reasonably sure
that it's not dangerous, but the fact that the crash has been seen in
the 4.4 stream is a bit discouraging.  Does the frequency of this crash
seem at least diminished in 4.4 from what it was in 4.3?

-- 
You received this bug notification because you are a member of OpenJDK,
which is subscribed to openjdk-6 in Ubuntu.
https://bugs.launchpad.net/bugs/968308

Title:
  Opening Eclipse workbench causes SIGSEGV

Status in Eclipse:
  Confirmed
Status in “openjdk-6” package in Ubuntu:
  Confirmed

Bug description:
  Using Ubuntu 12.04 updated kernel 3.3.0-030300-generic x86_64.
  To reproduce:
   - Do fresh install of eclipse
   - open eclipse
   - click on Workbench icon

  The following error occurs:

  # A fatal error has been detected by the Java Runtime Environment:
  #
  #  SIGSEGV (0xb) at pc=0x00007f611eb2f5e0, pid=11709, tid=140057214498560
  #
  # JRE version: 6.0_24-b24
  # Java VM: OpenJDK 64-Bit Server VM (20.0-b12 mixed mode linux-amd64 compressed oops)
  # Derivative: IcedTea6 1.11.1
  # Distribution: Ubuntu precise (development branch), package 6b24-1.11.1-3ubuntu3
  # Problematic frame:
  # C  [libwebkitgtk-1.0.so.0+0x3da5e0]  webkitWebViewRegisterForIconNotification+0xc0

  See attached error log.

To manage notifications about this bug go to:
https://bugs.launchpad.net/eclipse/+bug/968308/+subscriptions