1 /* 2 * Copyright (c) 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