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 *
37 private static long AddressRangeShift = ZGlobals.ZPageSizeMinShift;
38
39 static {
40 VM.registerVMInitializedObserver((o, d) -> initialize(VM.getVM().getTypeDataBase()));
41 }
42
43 static private synchronized void initialize(TypeDataBase db) {
44 Type type = db.lookupType("ZAddressRangeMapForPageTable");
45
46 mapField = type.getAddressField("_map");
47 }
48
49 public ZAddressRangeMapForPageTable(Address addr) {
50 super(addr);
51 }
52
53 private Address map() {
54 return mapField.getValue(addr);
55 }
56
57 private long index_for_addr(Address addr) {
58 long index = ZAddress.offset(addr) >> AddressRangeShift;
59
60 return index;
61 }
62
63 Address get(Address addr) {
64 long index = index_for_addr(addr);
65
66 return map().getAddressAt(index * VM.getVM().getBytesPerLong());
67 }
68 }
|
1 /*
2 * Copyright (c) 2018, 2019, 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 *
37 private static long AddressRangeShift = ZGlobals.ZPageSizeMinShift;
38
39 static {
40 VM.registerVMInitializedObserver((o, d) -> initialize(VM.getVM().getTypeDataBase()));
41 }
42
43 static private synchronized void initialize(TypeDataBase db) {
44 Type type = db.lookupType("ZAddressRangeMapForPageTable");
45
46 mapField = type.getAddressField("_map");
47 }
48
49 public ZAddressRangeMapForPageTable(Address addr) {
50 super(addr);
51 }
52
53 private Address map() {
54 return mapField.getValue(addr);
55 }
56
57 public long size() {
58 return ZGlobals.ZAddressOffsetMax >> AddressRangeShift;
59 }
60
61 private long index_for_addr(Address addr) {
62 long index = ZAddress.offset(addr) >> AddressRangeShift;
63
64 return index;
65 }
66
67 Address at(long index) {
68 return map().getAddressAt(index * VM.getVM().getBytesPerLong());
69 }
70
71 Address get(Address addr) {
72 long index = index_for_addr(addr);
73 return at(index);
74 }
75
76 public class Iterator {
77 private long next = 0;
78
79 boolean hasNext() {
80 return next < size();
81 }
82
83 Address next() {
84 if (next >= size()) {
85 throw new RuntimeException("OOIBE");
86 }
87
88 return at(next++);
89 }
90 }
91 }
|