Mercurial > hg > graal-jvmci-8
view agent/src/share/classes/sun/jvm/hotspot/oops/ReceiverTypeData.java @ 3972:4f93f0d00802
7059019: G1: add G1 support to the SA
Summary: Extend the SA to recognize the G1CollectedHeap and implement any code that's needed by our serviceability tools (jmap, jinfo, jstack, etc.) that depend on the SA.
Reviewed-by: never, poonam, johnc
author | tonyp |
---|---|
date | Tue, 20 Sep 2011 09:59:59 -0400 |
parents | f6f3bb0ee072 |
children | 4bec1b1f7b33 |
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/* * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved. * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. * * * * * * * * * * * * * * * * * * * */ 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"); Oop recv = oopAt(receiverCellIndex(row)); return (Klass)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); } }