1 /*
   2  * Copyright (c) 2011, 2012, 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.io.PrintStream;
  28 import java.util.*;
  29 import sun.jvm.hotspot.debugger.*;
  30 import sun.jvm.hotspot.runtime.*;
  31 import sun.jvm.hotspot.oops.*;
  32 import sun.jvm.hotspot.ci.*;
  33 import sun.jvm.hotspot.types.*;
  34 
  35 public class JVMState extends VMObject {
  36   static {
  37     VM.registerVMInitializedObserver(new Observer() {
  38         public void update(Observable o, Object data) {
  39           initialize(VM.getVM().getTypeDataBase());
  40         }
  41       });
  42   }
  43 
  44   private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
  45     Type type      = db.lookupType("JVMState");
  46     mapField = type.getAddressField("_map");
  47     methodField = type.getAddressField("_method");
  48     bciField = new CIntField(type.getCIntegerField("_bci"), 0);
  49     spField = new CIntField(type.getCIntegerField("_sp"), 0);
  50     endoffField = new CIntField(type.getCIntegerField("_endoff"), 0);
  51     try {
  52         scloffField = new CIntField(type.getCIntegerField("_scloff"), 0);
  53     } catch (Exception e) {
  54     }
  55     monoffField = new CIntField(type.getCIntegerField("_monoff"), 0);
  56     stkoffField = new CIntField(type.getCIntegerField("_stkoff"), 0);
  57     locoffField = new CIntField(type.getCIntegerField("_locoff"), 0);
  58     depthField = new CIntField(type.getCIntegerField("_depth"), 0);
  59     callerField = type.getAddressField("_caller");
  60   }
  61 
  62   private static AddressField mapField;
  63   private static AddressField methodField;
  64   private static CIntField bciField;
  65   private static CIntField spField;
  66   private static CIntField endoffField;
  67   private static CIntField scloffField;
  68   private static CIntField monoffField;
  69   private static CIntField stkoffField;
  70   private static CIntField locoffField;
  71   private static CIntField depthField;
  72   private static AddressField callerField;
  73 
  74   public static JVMState create(Address addr) {
  75     if (addr == null) return null;
  76     return new JVMState(addr);
  77   }
  78 
  79   public JVMState(Address addr) {
  80     super(addr);
  81   }
  82 
  83   public ciMethod method() {
  84     return (ciMethod) ciObjectFactory.getMetadata(methodField.getValue(getAddress()));
  85   }
  86 
  87   public int bci() {
  88     return (int)bciField.getValue(getAddress());
  89   }
  90 
  91   public int depth() {
  92     return (int)depthField.getValue(getAddress());
  93   }
  94 
  95   public JVMState caller() {
  96     return create(callerField.getValue(getAddress()));
  97   }
  98 
  99   public void dumpSpec(PrintStream out) {
 100     ciMethod m = method();
 101     if (m != null) {
 102       Method meth = m.method();
 103       out.print(" " + meth.getMethodHolder().getName().asString().replace('/', '.') + "::" +
 104                 meth.getName().asString() + " @ bci:" + bci());
 105     } else {
 106       out.print(" runtime stub");
 107     }
 108     if (caller() != null)  caller().dumpSpec(out);
 109   }
 110 }