* gc.c (garbage_collect): all GC is start from garbage_collect()
  (or garbage_collect_body()). `garbage_collect()' accept additional
  two parameters `full_mark' and `immediate_sweep'.
  If `full_mark' is TRUE, then force it full gc (major gc), otherwise,
  it depends on status of object space. Now, it will be minor gc.
  If `immediate_sweep' is TRUE, then disable lazy sweep.
  To allocate free memory, `full_mark' and `immediate_sweep' should be
  TRUE. Otherwise, they should be FALSE.
* gc.c (gc_prepare_free_objects): use `garbage_collect_body()'.
* gc.c (slot_sweep, before_gc_sweep, after_gc_sweep): add logging code.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40884 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* 2013-05-22

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40885 b2dd03c8-39d4-4d8f-98ff-823fe69b080e