Problems with _Unwind_Backtrace() vs signal handlers

[Bryce McKinlay]

Andrew Haley wrote:

>I see that the signal handlers in libgcj create the exception before
>calling MAKE_THROW_FRAME: that's a bug.  In the past this wasn't a bug
>because we didn't use the unwinder to generate the stack trace.
>
>We shouldn't see an incorrect return address unless we're calling
>_Unwind_Backtrace before MAKE_THROW_FRAME, and there's no reason to do
>that.
>
>I suggest you try something like
>
>SIGNAL_HANDLER (catch_segv)
>{
>  unblock_signal (SIGSEGV);
>  MAKE_THROW_FRAME (nullp);
>  java::lang::NullPointerException *nullp 
>    = new java::lang::NullPointerException;
>  throw nullp;
>}
>  
>

This was indeed the problem - thanks Andrew!

Regards

Bryce