[RFC] Enhanced Garbage Collection Probe Points

[Lukas Berk <lberk at redhat dot com>]

Hey,

I've been working on adding improved probe point within the garbage
collection system.  This will allow system administrators using various
tools to better analyze which garbage collection algorithms are
effective and java developers to better understand how (often) their
objects are being collected.

Specific probe points that I've aimed to include are:

- G1, concurrent mark sweep, parallel mark sweep, and tenured
  collections

- new generation definitions

- parallel scavenges

- parallel compaction

- object 'moves/resizes' between memory addresses

Please note that the attached patch should be appended to the
patch/systemtap.patch file.  Any feedback or suggestions would be
greatly appreciated.

Cheers,

Lukas

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