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 * Copyright (c) 2002, 2022, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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 */

package sun.jvm.hotspot.oops;

import java.util.*;

import sun.jvm.hotspot.debugger.*;
import sun.jvm.hotspot.runtime.*;
import sun.jvm.hotspot.types.*;
import sun.jvm.hotspot.utilities.Observable;
import sun.jvm.hotspot.utilities.Observer;

public class BreakpointInfo extends VMObject {
  private static CIntegerField origBytecodeField;
  private static CIntegerField bciField;
  private static CIntegerField nameIndexField;
  private static CIntegerField signatureIndexField;
  private static AddressField  nextField;

  static {
    VM.registerVMInitializedObserver(new Observer() {
        public void update(Observable o, Object data) {
          initialize(VM.getVM().getTypeDataBase());
        }
      });
  }

  private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
    if (!VM.getVM().isJvmtiSupported()) {
      // no BreakpointInfo support without JVMTI
      return;
    }

    Type type                  = db.lookupType("BreakpointInfo");

    origBytecodeField   = type.getCIntegerField("_orig_bytecode");
    bciField            = type.getCIntegerField("_bci");
    nameIndexField      = type.getCIntegerField("_name_index");
    signatureIndexField = type.getCIntegerField("_signature_index");
    nextField           = type.getAddressField ("_next");
  }

  public BreakpointInfo(Address addr) {
    super(addr);
  }

  public int  getOrigBytecode()   { return (int) origBytecodeField.getValue(addr);   }
  public int  getBCI()            { return (int) bciField.getValue(addr);            }
  public long getNameIndex()      { return nameIndexField.getValue(addr);            }
  public long getSignatureIndex() { return signatureIndexField.getValue(addr);       }
  public BreakpointInfo getNext() {
    return VMObjectFactory.newObject(BreakpointInfo.class, nextField.getValue(addr));
  }

  public boolean match(Method m, int bci) {
    return (bci == getBCI() && match(m));
  }

  public boolean match(Method m) {
    return (getNameIndex() == m.getNameIndex() &&
            getSignatureIndex() == m.getSignatureIndex());
  }
}
