GC_GUARDED_PTR   1113 vm_backtrace.c     rb_ary_store(frame, CALLER_BINDING_BINDING, GC_GUARDED_PTR(cfp)); /* create later */
GC_GUARDED_PTR   1115 vm_backtrace.c     rb_ary_store(frame, CALLER_BINDING_CFP, GC_GUARDED_PTR(cfp));
GC_GUARDED_PTR   1130 vm_backtrace.c     rb_ary_store(frame, CALLER_BINDING_CFP, GC_GUARDED_PTR(cfp));
GC_GUARDED_PTR    962 vm_core.h      #define VM_ENVVAL_BLOCK_PTR(v)     (GC_GUARDED_PTR(v) | VM_ENVVAL_BLOCK_PTR_FLAG)
GC_GUARDED_PTR    964 vm_core.h      #define VM_ENVVAL_PREV_EP_PTR(v)   ((VALUE)GC_GUARDED_PTR(v))