Access checking, yes, but the scope of memory corruption does increase unavoidably, given the main thing the pgsql-hackers investigating threads want: one virtu

Access checking, yes, but the scope of memory corruption does increase unavoidably, given the main thing the pgsql-hackers investigating threads want: one virtual memory context when toggling between concurrent work. Of course, there's a huge amount of shared space already, so a willful corruption can already do virtually anything. But, more is more.