| /* |
| * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| package sun.jvm.hotspot.oops; |
| |
| import java.io.*; |
| import java.util.*; |
| import sun.jvm.hotspot.debugger.*; |
| import sun.jvm.hotspot.runtime.*; |
| import sun.jvm.hotspot.types.*; |
| import sun.jvm.hotspot.utilities.*; |
| |
| // Entries in a ProfileData object to record types: it can either be |
| // none (no profile), unknown (conflicting profile data) or a klass if |
| // a single one is seen. Whether a null reference was seen is also |
| // recorded. No counter is associated with the type and a single type |
| // is tracked (unlike VirtualCallData). |
| public abstract class TypeEntries<K,M> { |
| static final int nullSeen = 1; |
| static final int typeMask = ~nullSeen; |
| static final int typeUnknown = 2; |
| static final int statusBits = nullSeen | typeUnknown; |
| static final int typeKlassMask = ~statusBits; |
| |
| final ProfileData pd; |
| final int baseOff; |
| final MethodDataInterface<K,M> methodData; |
| |
| boolean wasNullSeen(int index) { |
| int v = pd.intptrAt(index); |
| return (v & nullSeen) != 0; |
| } |
| |
| boolean isTypeUnknown(int index) { |
| int v = pd.intptrAt(index); |
| return (v & typeUnknown) != 0; |
| } |
| |
| boolean isTypeNone(int index) { |
| int v = pd.intptrAt(index); |
| return (v & typeMask) == 0; |
| } |
| |
| K validKlass(int index) { |
| if (!isTypeNone(index) && |
| !isTypeUnknown(index)) { |
| return methodData.getKlassAtAddress(pd.addressAt(index).andWithMask(typeKlassMask)); |
| } else { |
| return null; |
| } |
| } |
| |
| void printKlass(PrintStream st, int index) { |
| if (isTypeNone(index)) { |
| st.print("none"); |
| } else if (isTypeUnknown(index)) { |
| st.print("unknown"); |
| } else { |
| methodData.printKlassValueOn(validKlass(index), st); |
| } |
| if (wasNullSeen(index)) { |
| st.print(" (null seen)"); |
| } |
| } |
| |
| TypeEntries(MethodDataInterface<K,M> methodData, ProfileData pd, int baseOff) { |
| this.pd = pd; |
| this.baseOff = baseOff; |
| this.methodData = methodData; |
| } |
| |
| long intptrAt(int index) { |
| return pd.intptrAt(index); |
| } |
| |
| } |