[patch] Fix oddity in personality routine

[Jack Howarth]

On Mon, Nov 16, 2009 at 07:08:49PM +0000, Andrew Haley wrote:
> 
> There's another unwinder?  Gosh.
> 
> Set a bp on '_Jv_Throw' and step through.  You'll need to compile libgcc
> with -O0 or you'll go insane.  The unwinder is quite complex, and it takes
> a fair while to understand it.
> 
> Andrew.

Andrew,
   I have added an unwinder_walk.txt attachment to PR41991. It is a walk
from the _Jv_Throw breakpoint for ecj1 compiling the testme.java test code
with a libgcc compiled with -O0 installed. This is with current gcc trunk
using the patch from http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41991#c3
compiled on x86_64-apple-darwin9.8.0 to make sure that the FSF libgcc is
used. Hopefully a fix can be found in the libjava code that calls the
unwinder as fixing this within the unwinder won't help us with darwin10
or later.
            Jack