view agent/src/share/classes/sun/jvm/hotspot/oops/VirtualCallData.java @ 6169:cfa2c82f4c04

7175133: jinfo failed to get system properties after 6924259 Summary: String offset and count fields as fix of 6924259 were removed, and become optional. SA still use offset and count fields to read String contents and failed. Fix if they exist, use them other then use value field only to read, this keeps consistent with the changes in 6924259. Reviewed-by: dholmes, mikael Contributed-by: yumin.qi@oracle.com
author minqi
date Fri, 22 Jun 2012 15:35:30 -0700
parents 4bec1b1f7b33
children b9a9ed0f8eeb
line wrap: on
line source

/*
 * Copyright (c) 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.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */

package sun.jvm.hotspot.oops;

import java.io.*;
import java.util.*;
import sun.jvm.hotspot.debugger.*;
import sun.jvm.hotspot.runtime.*;
import sun.jvm.hotspot.types.*;
import sun.jvm.hotspot.utilities.*;

// VirtualCallData
//
// A VirtualCallData is used to access profiling information about a
// call.  For now, it has nothing more than a ReceiverTypeData.
public class VirtualCallData extends ReceiverTypeData {
  public VirtualCallData(DataLayout layout) {
    super(layout);
    //assert(layout.tag() == DataLayout.virtualCallDataTag, "wrong type");
  }

  static int staticCellCount() {
    // At this point we could add more profile state, e.g., for arguments.
    // But for now it's the same size as the base record type.
    return ReceiverTypeData.staticCellCount();
  }

  public int cellCount() {
    return staticCellCount();
  }

  // Direct accessors
  static int virtualCallDataSize() {
    return cellOffset(staticCellCount());
  }

  public void printDataOn(PrintStream st) {
    printShared(st, "VirtualCallData");
    printReceiverDataOn(st);
  }
}