Mercurial > hg > truffle
diff agent/src/share/classes/sun/jvm/hotspot/oops/RetData.java @ 3945:8ed53447f690
Merge
author | iveresov |
---|---|
date | Thu, 15 Sep 2011 12:44:09 -0700 |
parents | f6f3bb0ee072 |
children | 79f492f184d0 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/src/share/classes/sun/jvm/hotspot/oops/RetData.java Thu Sep 15 12:44:09 2011 -0700 @@ -0,0 +1,113 @@ +/* + * Copyright (c) 2011, 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.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.*; + +// RetData +// +// A RetData is used to access profiling information for a ret bytecode. +// It is composed of a count of the number of times that the ret has +// been executed, followed by a series of triples of the form +// (bci, count, di) which count the number of times that some bci was the +// target of the ret and cache a corresponding data displacement. +public class RetData extends CounterData { + + static final int bci0Offset = counterCellCount; + static final int count0Offset = bci0Offset + 1; + static final int displacement0Offset = count0Offset + 1; + static final int retRowCellCount = (displacement0Offset + 1) - bci0Offset; + + public RetData(DataLayout layout) { + super(layout); + //assert(layout.tag() == DataLayout.retDataTag, "wrong type"); + } + + static final int noBci = -1; // value of bci when bci1/2 are not in use. + + static int staticCellCount() { + return counterCellCount + MethodData.BciProfileWidth * retRowCellCount; + } + + public int cellCount() { + return staticCellCount(); + } + + static int rowLimit() { + return MethodData.BciProfileWidth; + } + static int bciCellIndex(int row) { + return bci0Offset + row * retRowCellCount; + } + static int bciCountCellIndex(int row) { + return count0Offset + row * retRowCellCount; + } + static int bciDisplacementCellIndex(int row) { + return displacement0Offset + row * retRowCellCount; + } + + // Direct accessors + int bci(int row) { + return intAt(bciCellIndex(row)); + } + int bciCount(int row) { + return uintAt(bciCountCellIndex(row)); + } + int bciDisplacement(int row) { + return intAt(bciDisplacementCellIndex(row)); + } + + // Code generation support + static int bciOffset(int row) { + return cellOffset(bciCellIndex(row)); + } + static int bciCountOffset(int row) { + return cellOffset(bciCountCellIndex(row)); + } + static int bciDisplacementOffset(int row) { + return cellOffset(bciDisplacementCellIndex(row)); + } + + public void printDataOn(PrintStream st) { + printShared(st, "RetData"); + int row; + int entries = 0; + for (row = 0; row < rowLimit(); row++) { + if (bci(row) != noBci) entries++; + } + st.println("count(" + count() + ") entries(" + entries + ")"); + for (row = 0; row < rowLimit(); row++) { + if (bci(row) != noBci) { + tab(st); + st.println(" bci(" + bci(row) + ": count(" + bciCount(row) + ") displacement(" + bciDisplacement(row) + "))"); + } + } + } +}