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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * 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 PhaseCFG extends Phase {
  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("PhaseCFG");
  45     numBlocksField = new CIntField(type.getCIntegerField("_num_blocks"), 0);
  46     blocksField = type.getAddressField("_blocks");
  47     bbsField = type.getAddressField("_bbs");
  48     brootField = type.getAddressField("_broot");
  49   }
  50 
  51   private static CIntField numBlocksField;
  52   private static AddressField blocksField;
  53   private static AddressField bbsField;
  54   private static AddressField brootField;
  55 
  56   public PhaseCFG(Address addr) {
  57     super(addr);
  58   }
  59 
  60   public void dump(PrintStream out) {
  61     int addressSize = (int)VM.getVM().getAddressSize();
  62     int numBlocks = (int)numBlocksField.getValue(getAddress());
  63     Block_List blocks = new Block_List(getAddress().addOffsetTo(blocksField.getOffset()));
  64     int offset = 0;
  65     for (int i  = 0; i < numBlocks; i++) {
  66       blocks.at(i).dump(out);
  67     }
  68   }
  69 }