1 /* 2 * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 #ifndef SHARE_GC_Z_ZADDRESS_HPP 25 #define SHARE_GC_Z_ZADDRESS_HPP 26 27 #include "memory/allocation.hpp" 28 29 class ZAddress : public AllStatic { 30 public: 31 static bool is_null(uintptr_t value); 32 static bool is_bad(uintptr_t value); 33 static bool is_good(uintptr_t value); 34 static bool is_good_or_null(uintptr_t value); 35 static bool is_weak_bad(uintptr_t value); 36 static bool is_weak_good(uintptr_t value); 37 static bool is_weak_good_or_null(uintptr_t value); 38 static bool is_marked(uintptr_t value); 39 static bool is_finalizable(uintptr_t value); 40 static bool is_remapped(uintptr_t value); 41 42 static uintptr_t address(uintptr_t value); 43 static uintptr_t offset(uintptr_t value); 44 static uintptr_t good(uintptr_t value); 45 static uintptr_t good_or_null(uintptr_t value); 46 static uintptr_t finalizable_good(uintptr_t value); 47 static uintptr_t marked(uintptr_t value); 48 static uintptr_t marked0(uintptr_t value); 49 static uintptr_t marked1(uintptr_t value); 50 static uintptr_t remapped(uintptr_t value); 51 static uintptr_t remapped_or_null(uintptr_t value); 52 }; 53 54 class ZAddressMasks : public AllStatic { 55 friend class ZAddressTest; 56 57 private: 58 static void set_good_mask(uintptr_t mask); 59 60 public: 61 static void initialize(); 62 static void flip_to_marked(); 63 static void flip_to_remapped(); 64 }; 65 66 #endif // SHARE_GC_Z_ZADDRESS_HPP