mark_stack_locations 4132 gc.c           static void mark_stack_locations(rb_objspace_t *objspace, rb_thread_t *th,
mark_stack_locations 4156 gc.c               mark_stack_locations(objspace, th, stack_start, stack_end);
mark_stack_locations 4166 gc.c               mark_stack_locations(objspace, th, stack_start, stack_end);