Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/oops/ReceiverTypeData.java @ 18665:96861e3f8cc5
made CFGPrinterObserver reset (upon close) properly
author | Doug Simon <doug.simon@oracle.com> |
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date | Thu, 11 Dec 2014 22:14:30 +0100 |
parents | da91efe96a93 |
children |
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/* * Copyright (c) 2011, 2012, 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.*; // ReceiverTypeData // // A ReceiverTypeData is used to access profiling information about a // dynamic type check. It consists of a counter which counts the total times // that the check is reached, and a series of (Klass, count) pairs // which are used to store a type profile for the receiver of the check. public class ReceiverTypeData extends CounterData { static final int receiver0Offset = counterCellCount; static final int count0Offset = receiver0Offset + 1; static final int receiverTypeRowCellCount = (count0Offset + 1) - receiver0Offset; public ReceiverTypeData(DataLayout layout) { super(layout); //assert(layout.tag() == DataLayout.receiverTypeDataTag || // layout.tag() == DataLayout.virtualCallDataTag, "wrong type"); } boolean isReceivertypedata() { return true; } static int staticCellCount() { return counterCellCount + MethodData.TypeProfileWidth * receiverTypeRowCellCount; } public int cellCount() { return staticCellCount(); } // Direct accessors public static int rowLimit() { return MethodData.TypeProfileWidth; } public static int receiverCellIndex(int row) { return receiver0Offset + row * receiverTypeRowCellCount; } public static int receiverCountCellIndex(int row) { return count0Offset + row * receiverTypeRowCellCount; } // Get the receiver at row. The 'unchecked' version is needed by parallel old // gc; it does not assert the receiver is a klass. During compaction of the // perm gen, the klass may already have moved, so the isKlass() predicate // would fail. The 'normal' version should be used whenever possible. Klass receiverUnchecked(int row) { //assert(row < rowLimit(), "oob"); Address recv = addressAt(receiverCellIndex(row)); return (Klass)Metadata.instantiateWrapperFor(recv); } public Klass receiver(int row) { Klass recv = receiverUnchecked(row); //assert(recv == NULL || ((oop)recv).isKlass(), "wrong type"); return recv; } public int receiverCount(int row) { //assert(row < rowLimit(), "oob"); return uintAt(receiverCountCellIndex(row)); } // Code generation support static int receiverOffset(int row) { return cellOffset(receiverCellIndex(row)); } static int receiverCountOffset(int row) { return cellOffset(receiverCountCellIndex(row)); } static int receiverTypeDataSize() { return cellOffset(staticCellCount()); } void printReceiverDataOn(PrintStream st) { int row; int entries = 0; for (row = 0; row < rowLimit(); row++) { if (receiver(row) != null) entries++; } st.println("count(" + count() + ") entries(" + entries + ")"); for (row = 0; row < rowLimit(); row++) { if (receiver(row) != null) { tab(st); receiver(row).printValueOn(st); st.println("(" + receiverCount(row) + ")"); } } } public void printDataOn(PrintStream st) { printShared(st, "ReceiverTypeData"); printReceiverDataOn(st); } }