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annotate agent/src/share/classes/sun/jvm/hotspot/oops/MethodCounters.java @ 10105:aeaca88565e6

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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
date Tue, 09 Apr 2013 17:17:41 -0400
parents
children de6a9e811145
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10105
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1 /*
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2 * Copyright (c) 2013, 2013, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
aeaca88565e6 8010862: The Method counter fields used for profiling can be allocated lazily.
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6 * under the terms of the GNU General Public License version 2 only, as
aeaca88565e6 8010862: The Method counter fields used for profiling can be allocated lazily.
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aeaca88565e6 8010862: The Method counter fields used for profiling can be allocated lazily.
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aeaca88565e6 8010862: The Method counter fields used for profiling can be allocated lazily.
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aeaca88565e6 8010862: The Method counter fields used for profiling can be allocated lazily.
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 package sun.jvm.hotspot.oops;
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26
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27 import java.io.*;
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28 import java.util.*;
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29 import sun.jvm.hotspot.debugger.*;
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30 import sun.jvm.hotspot.runtime.*;
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31 import sun.jvm.hotspot.types.*;
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32 import sun.jvm.hotspot.utilities.*;
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33
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34 public class MethodCounters extends Metadata {
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35 public MethodCounters(Address addr) {
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36 super(addr);
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37 }
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38
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39 static {
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40 VM.registerVMInitializedObserver(new Observer() {
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41 public void update(Observable o, Object data) {
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42 initialize(VM.getVM().getTypeDataBase());
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43 }
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44 });
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45 }
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46
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47 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
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48 Type type = db.lookupType("MethodCounters");
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49
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50 interpreterInvocationCountField = new CIntField(type.getCIntegerField("_interpreter_invocation_count"), 0);
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51 interpreterThrowoutCountField = new CIntField(type.getCIntegerField("_interpreter_throwout_count"), 0);
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52 if (!VM.getVM().isCore()) {
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53 invocationCounter = new CIntField(type.getCIntegerField("_invocation_counter"), 0);
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54 backedgeCounter = new CIntField(type.getCIntegerField("_backedge_counter"), 0);
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55 }
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56 }
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57
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58 private static CIntField interpreterInvocationCountField;
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59 private static CIntField interpreterThrowoutCountField;
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60 private static CIntField invocationCounter;
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61 private static CIntField backedgeCounter;
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62
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63 public int interpreterInvocationCount() {
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64 return (int) interpreterInvocationCountField.getValue(this);
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65 }
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66
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67 public int interpreterThrowoutCount() {
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68 return (int) interpreterThrowoutCountField.getValue(this);
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69 }
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70 public long getInvocationCounter() {
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71 if (Assert.ASSERTS_ENABLED) {
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72 Assert.that(!VM.getVM().isCore(), "must not be used in core build");
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73 }
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74 return invocationCounter.getValue(this);
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75 }
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76 public long getBackedgeCounter() {
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77 if (Assert.ASSERTS_ENABLED) {
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78 Assert.that(!VM.getVM().isCore(), "must not be used in core build");
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79 }
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80 return backedgeCounter.getValue(this);
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81 }
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82
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83 public void printValueOn(PrintStream tty) {
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84 }
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85 }
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86