Mercurial > hg > truffle
comparison agent/src/share/classes/sun/jvm/hotspot/oops/MethodCounters.java @ 10105:aeaca88565e6
8010862: The Method counter fields used for profiling can be allocated lazily.
Summary: Allocate the method's profiling related metadata until they are needed.
Reviewed-by: coleenp, roland
author | jiangli |
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date | Tue, 09 Apr 2013 17:17:41 -0400 |
parents | |
children | de6a9e811145 |
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9055:dcdeb150988c | 10105:aeaca88565e6 |
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1 /* | |
2 * Copyright (c) 2013, 2013, 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.oops; | |
26 | |
27 import java.io.*; | |
28 import java.util.*; | |
29 import sun.jvm.hotspot.debugger.*; | |
30 import sun.jvm.hotspot.runtime.*; | |
31 import sun.jvm.hotspot.types.*; | |
32 import sun.jvm.hotspot.utilities.*; | |
33 | |
34 public class MethodCounters extends Metadata { | |
35 public MethodCounters(Address addr) { | |
36 super(addr); | |
37 } | |
38 | |
39 static { | |
40 VM.registerVMInitializedObserver(new Observer() { | |
41 public void update(Observable o, Object data) { | |
42 initialize(VM.getVM().getTypeDataBase()); | |
43 } | |
44 }); | |
45 } | |
46 | |
47 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException { | |
48 Type type = db.lookupType("MethodCounters"); | |
49 | |
50 interpreterInvocationCountField = new CIntField(type.getCIntegerField("_interpreter_invocation_count"), 0); | |
51 interpreterThrowoutCountField = new CIntField(type.getCIntegerField("_interpreter_throwout_count"), 0); | |
52 if (!VM.getVM().isCore()) { | |
53 invocationCounter = new CIntField(type.getCIntegerField("_invocation_counter"), 0); | |
54 backedgeCounter = new CIntField(type.getCIntegerField("_backedge_counter"), 0); | |
55 } | |
56 } | |
57 | |
58 private static CIntField interpreterInvocationCountField; | |
59 private static CIntField interpreterThrowoutCountField; | |
60 private static CIntField invocationCounter; | |
61 private static CIntField backedgeCounter; | |
62 | |
63 public int interpreterInvocationCount() { | |
64 return (int) interpreterInvocationCountField.getValue(this); | |
65 } | |
66 | |
67 public int interpreterThrowoutCount() { | |
68 return (int) interpreterThrowoutCountField.getValue(this); | |
69 } | |
70 public long getInvocationCounter() { | |
71 if (Assert.ASSERTS_ENABLED) { | |
72 Assert.that(!VM.getVM().isCore(), "must not be used in core build"); | |
73 } | |
74 return invocationCounter.getValue(this); | |
75 } | |
76 public long getBackedgeCounter() { | |
77 if (Assert.ASSERTS_ENABLED) { | |
78 Assert.that(!VM.getVM().isCore(), "must not be used in core build"); | |
79 } | |
80 return backedgeCounter.getValue(this); | |
81 } | |
82 | |
83 public void printValueOn(PrintStream tty) { | |
84 } | |
85 } | |
86 |