1 /*
   2  * Copyright (c) 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 
  25 package sun.jvm.hotspot.gc.z;
  26 
  27 import sun.jvm.hotspot.debugger.Address;
  28 import sun.jvm.hotspot.runtime.VM;
  29 
  30 class ZAddress {
  31     static long as_long(Address value) {
  32         if (value == null) {
  33             return 0;
  34         }
  35         return value.asLongValue();
  36     };
  37 
  38     static boolean is_null(Address value) {
  39         return value == null;
  40     }
  41 
  42     static boolean is_weak_bad(Address value) {
  43         return (as_long(value) & ZGlobals.ZAddressWeakBadMask()) != 0;
  44     }
  45 
  46     static boolean is_weak_good(Address value) {
  47         return !is_weak_bad(value) && !is_null(value);
  48     }
  49 
  50     static boolean is_weak_good_or_null(Address value) {
  51         return !is_weak_bad(value);
  52     }
  53 
  54     static long offset(Address address) {
  55         return as_long(address) & ZGlobals.ZAddressOffsetMask;
  56     }
  57 
  58     static Address address(long value) {
  59         VM vm = VM.getVM();
  60         if (vm.getOS().equals("solaris") && vm.getCPU().equals("sparc")) {
  61             value |= ZGlobals.ZAddressSpaceStart;
  62         }
  63 
  64         return ZOop.to_address(value);
  65     }
  66 
  67     static Address good(Address value) {
  68         return address(offset(value) | ZGlobals.ZAddressGoodMask());
  69     }
  70 
  71     static Address good_or_null(Address value) {
  72         return is_null(value) ? value : good(value);
  73     }
  74 }
--- EOF ---