RUBY_MARK_ENTER   173 cont.c             RUBY_MARK_ENTER("cont");
RUBY_MARK_ENTER   309 cont.c             RUBY_MARK_ENTER("cont");
RUBY_MARK_ENTER   108 iseq.c             RUBY_MARK_ENTER("iseq");
RUBY_MARK_ENTER   145 nacl/pepper_main.c   RUBY_MARK_ENTER("PepperInstance"0);
RUBY_MARK_ENTER   267 proc.c             RUBY_MARK_ENTER("binding");
RUBY_MARK_ENTER  1980 vm.c               RUBY_MARK_ENTER("vm");
RUBY_MARK_ENTER  2228 vm.c               RUBY_MARK_ENTER("thread");