GC_stopping_thread  298 gc/pthread_stop_world.c pthread_t GC_stopping_thread;
GC_stopping_thread  312 gc/pthread_stop_world.c     GC_stopping_thread = my_thread;    /* debugging only.      */
GC_stopping_thread  408 gc/pthread_stop_world.c     GC_stopping_thread = 0;  /* debugging only */