(minor) issues after upgrading to 2.20

[Joe Marcus Clarke]

On Mon, 2007-10-08 at 02:14 -0500, Jeremy Messenger wrote:
> On Mon, 08 Oct 2007 01:18:21 -0500, Joe Marcus Clarke <marcus at FreeBSD.org>  
> wrote:
> 
> > On Sun, 2007-10-07 at 20:56 -0500, Jeremy Messenger wrote:
> >> On Sun, 07 Oct 2007 20:41:16 -0500, Joe Marcus Clarke  
> >> <marcus at FreeBSD.org>
> >> wrote:
> >>
> >> > On Sun, 2007-10-07 at 20:18 -0500, Jeremy Messenger wrote:
> >> >> On Sun, 07 Oct 2007 17:07:43 -0500, Jeremy Messenger <mezz7 at cox.net>
> >> >> wrote:
> >> >>
> >> <snip>
> >> >> > Yelp likes to crash at the every exit. I couldn't get good
> >> >> backtraces, I
> >> >> > think I will have to reinstall firefox with WITH_DEBUG to get good
> >> >> one.
> >> >>
> >> >> The backtraces look better now after reinstall firefox w/ WITH_DEBUG.
> >> >>
> >> >> http://people.freebsd.org/~mezz/gdb/gdb-yelp.txt
> >> >
> >> > Firefox is trying to call some method in a module that gdb doesn't  
> >> know
> >> > about.  Do you have any plug-ins or extensions loaded in Firefox?
> >>
> >> Not that I know as I don't use Firefox. I went to Firefox's add-on place
> >> and it shows that I have 'DOM Inspector 1.8.1.7', that's it. Other days
> >> ago, I did add flashblock to reproduce Frank Jahnke's problem and I
> >> deleted it after that, but I can reproduce Yelp problem before I added
> >> flashblock.
> >>
> >> > Can you print out the value of mInfo in frame 1 of the stack?
> >>
> >> Yeah, I re-ran gdb and now it's frame 3, so here:
> >>
> >> (gdb) f 3
> >> #3  0x292bcded in ~nsGenericFactory (this=0x824f380) at
> >> nsGenericFactory.cpp:64
> >> 64      nsGenericFactory.cpp: No such file or directory.
> >>          in nsGenericFactory.cpp
> >> Current language:  auto; currently c++
> >> (gdb) print mInfo
> >> $1 = (const nsModuleComponentInfo *) 0xbfbfe7e0
> >
> > I need to see the contents of the pointer, so:
> >
> > print *mInfo
> 
> (gdb) print *mInfo
> $1 = {
>    mDescription = 0x878dd004 <Error reading address 0x878dd004: Bad  
> address>,
>    mCID = {m0 = 673230848, m1 = 16744, m2 = 10495, m3 =  
> "\020\036?(?|\021\b"},
>    mContractID = 0xbfbfe838 "X???N??(",
>    mConstructor = 0x28076ba1 <_rtld_bind_start+17>,
>    mRegisterSelfProc = 0x28209800, mUnregisterSelfProc = 0x20,
>    mFactoryDestructor = 0x80cdcf0,
>    mGetInterfacesProc = 0x293794c8 <vtable for nsTraceRefcntImpl+8>,
>    mGetLanguageHelperProc = 0x28ff41c8 <__JCR_LIST__+4>,
>    mClassInfoGlobal = 0x28ff1e10, mFlags = 0}
> 

It almost looks like it's trying to dereference a pointer to something
that is no longer in memory.  Like a module has already been unloaded,
and that code is being called.  I just upgraded my -CURRENT amd64
machine, and I can't reproduce there either.

But I did find something that may help.  Extract Firefox, then edit
embedding/base/nsEmbedAPI.cpp, and uncomment line 56.  Rebuild Firefox,
and see if this helps.  We may need to add that for < -CURRENT.

Joe

-- 
Joe Marcus Clarke
FreeBSD GNOME Team      ::      gnome at FreeBSD.org
FreeNode / #freebsd-gnome
http://www.FreeBSD.org/gnome
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