rb_thread_atfork  462 include/ruby/intern.h void rb_thread_atfork(void);
rb_thread_atfork 6023 io.c           	    rb_thread_atfork();
rb_thread_atfork 3720 process.c      	rb_thread_atfork();
rb_thread_atfork 6043 process.c          rb_thread_atfork();
rb_thread_atfork 6050 process.c            case 0:  rb_thread_atfork(); break; \