rb_thread_struct 4869 thread.c       	    struct rb_thread_struct volatile *mth;
rb_thread_struct   11 thread_sync.c      struct rb_thread_struct volatile *th;
rb_thread_struct  176 vm_core.h      struct rb_thread_struct;
rb_thread_struct  193 vm_core.h      	struct rb_thread_struct *running_thread;
rb_thread_struct  489 vm_core.h          struct rb_thread_struct *main_thread;
rb_thread_struct  490 vm_core.h          struct rb_thread_struct *running_thread;
rb_thread_struct  656 vm_core.h          struct rb_thread_struct *th;
rb_thread_struct 1498 vm_trace.c         struct rb_thread_struct *th; /* created thread, reserved */