Mercurial > hg > graal-jvmci-8
annotate agent/src/share/classes/sun/jvm/hotspot/runtime/PerfMemory.java @ 24234:ea6f94ab283b default tip
Added tag jvmci-0.36 for changeset 8128b98d4736
author | Gilles Duboscq <gilles.m.duboscq@oracle.com> |
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date | Mon, 18 Sep 2017 18:49:45 +0200 |
parents | c18cbe5936b8 |
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0 | 1 /* |
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2 * Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 package sun.jvm.hotspot.runtime; | |
26 | |
27 import java.util.*; | |
28 import sun.jvm.hotspot.debugger.*; | |
29 import sun.jvm.hotspot.oops.*; | |
30 import sun.jvm.hotspot.types.*; | |
31 | |
32 public class PerfMemory { | |
33 private static AddressField startField; | |
34 private static AddressField endField; | |
35 private static AddressField topField; | |
36 private static CIntegerField capacityField; | |
37 private static AddressField prologueField; | |
38 private static JIntField initializedField; | |
39 | |
40 static { | |
41 VM.registerVMInitializedObserver(new Observer() { | |
42 public void update(Observable o, Object data) { | |
43 initialize(VM.getVM().getTypeDataBase()); | |
44 } | |
45 }); | |
46 } | |
47 | |
48 private static synchronized void initialize(TypeDataBase db) { | |
49 Type type = db.lookupType("PerfMemory"); | |
50 startField = type.getAddressField("_start"); | |
51 endField = type.getAddressField("_end"); | |
52 topField = type.getAddressField("_top"); | |
53 capacityField = type.getCIntegerField("_capacity"); | |
54 prologueField = type.getAddressField("_prologue"); | |
55 initializedField = type.getJIntField("_initialized"); | |
56 } | |
57 | |
58 // Accessors | |
59 public static Address start() { | |
60 return startField.getValue(); | |
61 } | |
62 | |
63 public static Address end() { | |
64 return endField.getValue(); | |
65 } | |
66 | |
67 public static Address top() { | |
68 return topField.getValue(); | |
69 } | |
70 | |
71 public static long capacity() { | |
72 return capacityField.getValue(); | |
73 } | |
74 | |
75 public static boolean initialized() { | |
76 return ((int) initializedField.getValue()) != 0; | |
77 } | |
78 | |
79 public static PerfDataPrologue prologue() { | |
80 return (PerfDataPrologue) VMObjectFactory.newObject( | |
81 PerfDataPrologue.class, prologueField.getValue()); | |
82 } | |
83 | |
84 public static boolean contains(Address addr) { | |
85 return start() != null && | |
86 addr.minus(start()) >= 0 && | |
87 end().minus(addr) > 0; | |
88 } | |
89 | |
90 // an interface supplied to iterate PerfDataEntries | |
91 public static interface PerfDataEntryVisitor { | |
92 // returns false to stop the iteration | |
93 public boolean visit(PerfDataEntry pde); | |
94 } | |
95 | |
96 public static void iterate(PerfDataEntryVisitor visitor) { | |
97 PerfDataPrologue header = prologue(); | |
98 int off = header.entryOffset(); | |
99 int num = header.numEntries(); | |
100 Address addr = header.getAddress(); | |
101 | |
102 for (int i = 0; i < num; i++) { | |
103 PerfDataEntry pde = (PerfDataEntry) VMObjectFactory.newObject( | |
104 PerfDataEntry.class, addr.addOffsetTo(off)); | |
105 off += pde.entryLength(); | |
106 if (visitor.visit(pde) == false) return; | |
107 } | |
108 } | |
109 } |