review for 7098528: crash with java -XX:+ExtendedDTraceProbes

[Tom Rodriguez]

http://cr.openjdk.java.net/~never/7098528
61 lines changed: 46 ins; 12 del; 3 mod; 6107 unchg

7098528: crash with java -XX:+ExtendedDTraceProbes
Reviewed-by: kvn

The problem is that the dtrace and jvmti code asks for the size of the
java.lang.Class instance before we've set the oop_size.  We could just
pass the size argument down through the various interfaces but that
seems fragile.  Instead I changed the initialization path for Class
instances to setup the indirections earlier so that the dtrace paths
work correctly.  Tested with failing command from bug report.