mach_thread 90 gc/darwin_stop_world.c p->stop_info.mach_thread, mach_thread 12 gc/include/private/darwin_stop_world.h mach_port_t mach_thread; mach_thread 858 gc/pthread_support.c t -> stop_info.mach_thread = mach_thread_self(); mach_thread 1140 gc/pthread_support.c me -> stop_info.mach_thread = mach_thread_self();