[rvm-research] Modifying GenMutator

[Dingwen Y. <pd...@gm...>]

Hi all,

I want to modify GenMutator to get to know which objects in the
nursery are dead and which are alive after gc. And I noticed
CopyLocal.linearScan() can help me to do it. However, the
nursery.rebind(Gen.nurserySpace) has reset everything. Is it safe to
move this line to the block "phaseId == Gen.RELEASE", in this way I
think I can do some useful scans.

GenMutator.java
@NoInline
  public void collectionPhase(short phaseId, boolean primary) {

    if (phaseId == Gen.PREPARE) {
       nursery.rebind(Gen.nurserySpace);
      ...
    }

    if (phaseId == Gen.RELEASE) {
    	....
    }
    super.collectionPhase(phaseId, primary);
  }

Thanks!

Dingwen