GC_call_with_alloc_lock  861 gc/finalize.c      GC_PTR GC_call_with_alloc_lock(fn, client_data)
GC_call_with_alloc_lock  370 gc/gcc_support.c     return (void*) GC_call_with_alloc_lock( PointerWithLock, wp );}
GC_call_with_alloc_lock  396 gc/gcc_support.c     return (int) GC_call_with_alloc_lock( EqualWithLock, &ec );}