agent/src/share/classes/sun/jvm/hotspot/runtime/CompilerThread.java

*** 1,7 ****
  /*
!  * Copyright (c) 2000, 2003, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
--- 1,7 ----
  /*
!  * Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
*** 23,36 ****
--- 23,66 ----
   */
  
  package sun.jvm.hotspot.runtime;
  
  import java.io.*;
+ import java.util.*;
  import sun.jvm.hotspot.debugger.*;
  import sun.jvm.hotspot.types.*;
+ import sun.jvm.hotspot.ci.*;
  
  public class CompilerThread extends JavaThread {
+   static {
+     VM.registerVMInitializedObserver(new Observer() {
+         public void update(Observable o, Object data) {
+           initialize(VM.getVM().getTypeDataBase());
+         }
+       });
+   }
+ 
+   private static AddressField _env_field;
+ 
+   private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
+     Type type      = db.lookupType("CompilerThread");
+ 
+     _env_field = type.getAddressField("_env");
+   }
+ 
+   private ciEnv _env;
+ 
+   public synchronized ciEnv env() {
+     if (_env == null) {
+       Address v = _env_field.getValue(this.getAddress());
+       if (v != null) {
+         _env = new ciEnv(v);
+       }
+     }
+     return _env;
+   }
+ 
    public CompilerThread(Address addr) {
      super(addr);
    }
  
    public boolean isJavaThread() { return false; }