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.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.types.*;
  33 
  34 public class SafePointNode extends MultiNode {
  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("SafePointNode");
  45     jvmsField = type.getAddressField("_jvms");
  46   }
  47 
  48   private static AddressField jvmsField;
  49 
  50   public SafePointNode(Address addr) {
  51     super(addr);
  52   }
  53 
  54   public JVMState jvms() {
  55     return JVMState.create(jvmsField.getValue(getAddress()));
  56   }
  57 
  58   public void dumpSpec(PrintStream out) {
  59     JVMState jvms = jvms();
  60     if (jvms != null) out.print(" !");
  61     while (jvms != null) {
  62       Method m = jvms.method().method();
  63       int bci = jvms.bci();
  64       out.print(" " + m.getMethodHolder().getName().asString().replace('/', '.') + "::" + m.getName().asString() + " @ bci:" + bci);
  65       jvms = jvms.caller();
  66     }
  67   }
  68 }