1 /*
   2  * Copyright (c) 2011, 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  20  * CA 95054 USA or visit www.sun.com if you need additional information or
  21  * have any questions.
  22  *
  23  */
  24 
  25 package sun.jvm.hotspot.opto;
  26 
  27 import java.util.*;
  28 import java.io.PrintStream;
  29 import sun.jvm.hotspot.debugger.*;
  30 import sun.jvm.hotspot.runtime.*;
  31 import sun.jvm.hotspot.oops.*;
  32 import sun.jvm.hotspot.types.*;
  33 
  34 public class Block extends VMObject {
  35   static {
  36     VM.registerVMInitializedObserver(new Observer() {
  37         public void update(Observable o, Object data) {
  38           initialize(VM.getVM().getTypeDataBase());
  39         }
  40       });
  41   }
  42 
  43   private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
  44     Type type      = db.lookupType("Block");
  45     nodesField = type.getAddressField("_nodes");
  46     succsField = type.getAddressField("_succs");
  47     numSuccsField = new CIntField(type.getCIntegerField("_num_succs"), 0);
  48     preOrderField = new CIntField(type.getCIntegerField("_pre_order"), 0);
  49     domDepthField = new CIntField(type.getCIntegerField("_dom_depth"), 0);
  50     idomField = type.getAddressField("_idom");
  51     freqField = type.getJFloatField("_freq");
  52   }
  53 
  54   private static AddressField nodesField;
  55   private static AddressField succsField;
  56   private static CIntField numSuccsField;
  57   private static CIntField preOrderField;
  58   private static CIntField domDepthField;
  59   private static AddressField idomField;
  60   private static JFloatField freqField;
  61 
  62   public Block(Address addr) {
  63     super(addr);
  64   }
  65 
  66   public int preOrder() {
  67     return (int)preOrderField.getValue(getAddress());
  68   }
  69 
  70   public float freq() {
  71     return (float)freqField.getValue(getAddress());
  72   }
  73 
  74   public Node_List nodes() {
  75     return new Node_List(getAddress().addOffsetTo(nodesField.getOffset()));
  76   }
  77 
  78   public void dump(PrintStream out) {
  79     out.print("B" + preOrder());
  80     out.print(" Freq: " + freq());
  81     out.println();
  82     Node_List nl = nodes();
  83     int cnt = nl.size();
  84     for( int i=0; i<cnt; i++ )
  85       nl.at(i).dump(out);
  86     out.print("\n");
  87   }
  88 }