Comment by Sanddancer

I'm looking through the source I have for DTrace, and there is code written by folks other than Oracle, so changing the license is more difficult than just that. Regarding the GPL, one must ask at the same time why the GPL makes itself deliberately incompatible with four-clause BSD code, or other Free licenses that predated the GPL. Viral licensing just leads to petty fiefdoms and precludes the very sharing they claim to protect.