LazyMutex        2039 src/gdb-jit.cc static LazyMutex mutex = LAZY_MUTEX_INITIALIZER;
LazyMutex        7195 src/heap.cc    static LazyMutex checkpoint_object_stats_mutex = LAZY_MUTEX_INITIALIZER;
LazyMutex          59 src/v8.cc      static LazyMutex entropy_mutex = LAZY_MUTEX_INITIALIZER;