hotspot/agent/src/share/classes/sun/jvm/hotspot/code/RuntimeStub.java
author never
Mon, 05 Sep 2011 17:09:05 -0700
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7051798: SA-JDI: NPE in Frame.addressOfStackSlot(Frame.java:244) Reviewed-by: kvn
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/*
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 * Copyright (c) 2000, 2004, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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package sun.jvm.hotspot.code;
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import java.util.*;
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import sun.jvm.hotspot.debugger.*;
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import sun.jvm.hotspot.runtime.*;
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import sun.jvm.hotspot.types.*;
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public class RuntimeStub extends CodeBlob {
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  private static CIntegerField callerMustGCArgumentsField;
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  static {
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    VM.registerVMInitializedObserver(new Observer() {
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        public void update(Observable o, Object data) {
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          initialize(VM.getVM().getTypeDataBase());
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        }
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      });
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  }
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  private static void initialize(TypeDataBase db) {
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    Type type = db.lookupType("RuntimeStub");
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    callerMustGCArgumentsField                = type.getCIntegerField("_caller_must_gc_arguments");
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    // FIXME: add any needed fields
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  }
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  public RuntimeStub(Address addr) {
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    super(addr);
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  }
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  public boolean isRuntimeStub() {
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    return true;
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  }
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  public boolean callerMustGCArguments() {
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    return callerMustGCArgumentsField.getValue(addr) != 0;
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  }
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  public String getName() {
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    return "RuntimeStub: " + super.getName();
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  }
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}