Patch: not checked in: -Xtrace

[Bryce McKinlay]

Tom Tromey wrote:

>I'm not checking this in yet.  It isn't quite complete and I wanted
>to wait until after the 4.0 branch is made.
>
>This adds support for a new "-Xtrace" option to gij.  With this
>option, we try to print a line for every method call that is made.
>e.g:
>
>opsy. gij -Xtrace C
>[Call main ([Ljava.lang.String;)V]
>
>I'm not sure how useful this will be in practice; it just seemed like
>a fun hack.
>  
>

Cool. Maybe someone can implement some more of JVMPI using this as a base.

Bryce